Add forward delete functionality. Fixes #1033

Bumps [terser-webpack-plugin](https://github.com/webpack-contrib/terser-webpack-plugin) from 5.1.1 to 5.1.2.
- [Release notes](https://github.com/webpack-contrib/terser-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/terser-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/terser-webpack-plugin/compare/v5.1.1...v5.1.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

.github/workflows/pull_request.yml

@@ -17,8 +17,6 @@ jobs:
     - name: npm install, build, and test
       run: |
         npm install
-        npm run start -- --testMode
-        npm run demo
         npm run coverage
       env:
         CI: true

README.md

@@ -1,6 +1,6 @@
 <p>
   <a href="https://simple-keyboard.com/demo">
-	<img alt="simple-keyboard: Javascript Virtual Keyboard" src="https://i.imgur.com/Po6659n.gif">
+	<img alt="simple-keyboard: Javascript Virtual Keyboard" src="https://i.imgur.com/PrpbdIu.png">
   </a>
 	
   <a href="https://www.npmjs.com/package/simple-keyboard">
@@ -14,10 +14,6 @@
   <a href="https://github.com/hodgef/simple-keyboard/actions">
      <img alt="Publish Status" src="https://github.com/hodgef/simple-keyboard/workflows/Publish/badge.svg?color=green" />
   </a>
-
-  <a href="https://bundlephobia.com/result?p=simple-keyboard">
-    <img src="https://badgen.net/bundlephobia/minzip/simple-keyboard/?color=green" alt="install size">
-  </a>
   
   <a href="https://david-dm.org/hodgef/simple-keyboard">
     <img src="https://badgen.net/david/dep/hodgef/simple-keyboard" alt="coverage">
@@ -30,17 +26,17 @@
 
 <blockquote>Virtual Keyboard for Javascript. Compatible with your JS, React, Angular or Vue projects.</blockquote>
 
-## Demo 🚀
+## 🚀 Demo
 
 [Demo Showcase (Vanilla, Angular, React, Vue)](https://simple-keyboard.com/demo)
 
-## Installation & Usage 📦
+## 📦 Installation & Usage
 
 You can use simple-keyboard as a `<script>` tag from a CDN, or install it from npm.
 
 Check out the [Getting Started](https://simple-keyboard.com/getting-started) docs to begin.
 
-## Documentation 📖
+## 📖 Documentation
 
 Check out the [simple-keyboard documentation](https://simple-keyboard.com/documentation) site.
 
@@ -63,7 +59,7 @@ Feel free to browse the [Questions & Answers (FAQ)](https://simple-keyboard.com/
 
 <a href="https://discordapp.com/invite/SJexsCG" title="Join our Discord chat" target="_blank"><img src="https://discordapp.com/api/guilds/498978399801573396/widget.png?style=banner2" align="center"></a>
 
-## Modules ✳️
+## ✳️ Modules
 
 You can extend simple-keyboard's functionality with [modules](https://hodgef.com/simple-keyboard/modules/). Such as:
 
@@ -74,7 +70,7 @@ You can extend simple-keyboard's functionality with [modules](https://hodgef.com
 
 Want to create your own module? Check out the [Modules page](https://hodgef.com/simple-keyboard/modules/) for instructions.
 
-## Compatibility 🎯
+## 🎯 Compatibility
 
 - Internet Explorer 11
 - Edge (Spartan) 16+
@@ -84,7 +80,7 @@ Want to create your own module? Check out the [Modules page](https://hodgef.com/
 - Firefox 57+
 - iOS 9+
 
-## Contributing ✅
+## ✅ Contributing
 
 PRs and issues are always welcome. Feel free to submit any issues you have at:
 [https://github.com/hodgef/simple-keyboard/issues](https://github.com/hodgef/simple-keyboard/issues)

build/css/index.css

@@ -1,6 +1,6 @@
 /*!
  * 
- *   simple-keyboard v3.0.0
+ *   simple-keyboard v3.1.0
  *   https://github.com/hodgef/simple-keyboard
  *
  *   Copyright (c) Francisco Hodge (https://github.com/hodgef) and project contributors.

build/types/components/Keyboard.d.ts

@@ -13,8 +13,8 @@ declare class SimpleKeyboard {
     input: KeyboardInput;
     options: KeyboardOptions;
     utilities: any;
-    caretPosition: number;
-    caretPositionEnd: number;
+    caretPosition: number | null;
+    caretPositionEnd: number | null;
     keyboardDOM: KeyboardElement;
     keyboardPluginClasses: string;
     keyboardDOMClass: string;
@@ -34,8 +34,9 @@ declare class SimpleKeyboard {
     holdTimeout: number;
     isMouseHold: boolean;
     initialized: boolean;
-    candidateBox: CandidateBox;
+    candidateBox: CandidateBox | null;
     keyboardRowsDOM: KeyboardElement;
+    defaultName: string;
     /**
      * Creates an instance of SimpleKeyboard
      * @param {Array} params If first parameter is a string, it is considered the container class. The second parameter is then considered the options object. If first parameter is an object, it is considered the options object.
@@ -47,20 +48,20 @@ declare class SimpleKeyboard {
     handleParams: (params: KeyboardParams) => {
         keyboardDOMClass: string;
         keyboardDOM: KeyboardElement;
-        options: Partial<KeyboardOptions>;
+        options: Partial<KeyboardOptions | undefined>;
     };
     /**
      * Getters
      */
     getOptions: () => KeyboardOptions;
-    getCaretPosition: () => number;
-    getCaretPositionEnd: () => number;
+    getCaretPosition: () => number | null;
+    getCaretPositionEnd: () => number | null;
     /**
      * Changes the internal caret position
      * @param {number} position The caret's start position
      * @param {number} positionEnd The caret's end position
      */
-    setCaretPosition(position: number, endPosition?: number): void;
+    setCaretPosition(position: number | null, endPosition?: number | null): void;
     /**
      * Retrieve the candidates for a given input
      * @param input The input string to check
@@ -104,7 +105,7 @@ declare class SimpleKeyboard {
      * Clear the keyboard’s input.
      * @param {string} [inputName] optional - the internal input to select
      */
-    clearInput(inputName: string): void;
+    clearInput(inputName?: string): void;
     /**
      * Get the keyboard’s input (You can also get it from the onChange prop).
      * @param  {string} [inputName] optional - the internal input to select
@@ -166,7 +167,7 @@ declare class SimpleKeyboard {
      * Get the DOM Element of a button. If there are several buttons with the same name, an array of the DOM Elements is returned.
      * @param  {string} button The button layout name to select
      */
-    getButtonElement(button: string): KeyboardElement | KeyboardElement[];
+    getButtonElement(button: string): KeyboardElement | KeyboardElement[] | undefined;
     /**
      * This handles the "inputPattern" option
      * by checking if the provided inputPattern passes

build/types/interfaces.d.ts

@@ -3,10 +3,10 @@ import Utilities from "./services/Utilities";
 export interface KeyboardLayoutObject {
     [key: string]: string[];
 }
-export interface KeyboardButtonTheme {
+export declare type KeyboardButtonTheme = {
     class: string;
     buttons: string;
-}
+} | null;
 export interface KeyboardButtonAttributes {
     attribute: string;
     value: string;
@@ -32,16 +32,18 @@ export declare type CandidateBoxRenderParams = {
     onItemSelected: (selectedCandidate: string) => void;
 };
 export declare type KeyboardElement = HTMLDivElement | HTMLButtonElement;
-export declare type KeyboardHandlerEvent = PointerEvent & TouchEvent & KeyboardEvent & {
-    target: HTMLDivElement & HTMLInputElement;
-};
+export declare type KeyboardHandlerEvent = any;
 export interface KeyboardButtonElements {
     [key: string]: KeyboardElement[];
 }
 export interface UtilitiesParams {
     getOptions: () => KeyboardOptions;
-    getCaretPosition: () => number;
-    getCaretPositionEnd: () => number;
+    getCaretPosition: () => number | null;
+    getCaretPositionEnd: () => number | null;
+    dispatch: any;
+}
+export interface PhysicalKeyboardParams {
+    getOptions: () => KeyboardOptions;
     dispatch: any;
 }
 export interface KeyboardOptions {

build/types/services/PhysicalKeyboard.d.ts

@@ -1,4 +1,4 @@
-import { KeyboardOptions, UtilitiesParams } from "../interfaces";
+import { KeyboardOptions, PhysicalKeyboardParams } from "../interfaces";
 /**
  * Physical Keyboard Service
  */
@@ -8,7 +8,7 @@ declare class PhysicalKeyboard {
     /**
      * Creates an instance of the PhysicalKeyboard service
      */
-    constructor({ dispatch, getOptions }: Partial<UtilitiesParams>);
+    constructor({ dispatch, getOptions }: PhysicalKeyboardParams);
     handleHighlightKeyDown(event: KeyboardEvent): void;
     handleHighlightKeyUp(event: KeyboardEvent): void;
     /**

build/types/services/Utilities.d.ts

@@ -5,8 +5,8 @@ import { KeyboardOptions, UtilitiesParams } from "../interfaces";
  */
 declare class Utilities {
     getOptions: () => KeyboardOptions;
-    getCaretPosition: () => number;
-    getCaretPositionEnd: () => number;
+    getCaretPosition: () => number | null;
+    getCaretPositionEnd: () => number | null;
     dispatch: any;
     maxLengthReached: boolean;
     /**
@@ -72,6 +72,7 @@ declare class Utilities {
         "{home}": string;
         "{pageup}": string;
         "{delete}": string;
+        "{forwarddelete}": string;
         "{end}": string;
         "{pagedown}": string;
         "{numpadmultiply}": string;
@@ -122,7 +123,7 @@ declare class Utilities {
      * @param  {number} length Represents by how many characters the input should be moved
      * @param  {boolean} minus Whether the cursor should be moved to the left or not.
      */
-    updateCaretPosAction(length: number, minus?: boolean): number;
+    updateCaretPosAction(length: number, minus?: boolean): number | null;
     /**
      * Adds a string to the input at a given position
      *
@@ -133,20 +134,27 @@ declare class Utilities {
      */
     addStringAt(source: string, str: string, position?: number, positionEnd?: number, moveCaret?: boolean): string;
     /**
-     * Removes an amount of characters at a given position
+     * Removes an amount of characters before a given position
      *
      * @param  {string} source The source input
      * @param  {number} position The (cursor) position from where the characters should be removed
      * @param  {boolean} moveCaret Whether to update simple-keyboard's cursor
      */
     removeAt(source: string, position?: number, positionEnd?: number, moveCaret?: boolean): string;
+    /**
+     * Removes an amount of characters after a given position
+     *
+     * @param  {string} source The source input
+     * @param  {number} position The (cursor) position from where the characters should be removed
+     */
+    removeForwardsAt(source: string, position?: number, positionEnd?: number, moveCaret?: boolean): string;
     /**
      * Determines whether the maxLength has been reached. This function is called when the maxLength option it set.
      *
      * @param  {object} inputObj
      * @param  {string} updatedInput
      */
-    handleMaxLength(inputObj: KeyboardInput, updatedInput: string): boolean;
+    handleMaxLength(inputObj: KeyboardInput, updatedInput: string): boolean | undefined;
     /**
      * Gets the current value of maxLengthReached
      */

package.json

@@ -1,6 +1,6 @@
 {
   "name": "simple-keyboard",
-  "version": "3.0.0",
+  "version": "3.1.0",
   "description": "On-screen Javascript Virtual Keyboard",
   "main": "build/index.js",
   "types": "build/types/index.d.ts",
@@ -39,38 +39,38 @@
   ],
   "license": "MIT",
   "devDependencies": {
-    "@babel/cli": "^7.13.0",
-    "@babel/core": "^7.13.8",
+    "@babel/cli": "^7.13.16",
+    "@babel/core": "^7.14.2",
     "@babel/plugin-proposal-class-properties": "^7.13.0",
     "@babel/plugin-transform-typescript": "^7.13.0",
     "@babel/polyfill": "^7.12.1",
-    "@babel/preset-env": "^7.13.9",
-    "@types/jest": "^26.0.20",
-    "@typescript-eslint/eslint-plugin": "^4.16.1",
-    "@typescript-eslint/parser": "^4.16.1",
+    "@babel/preset-env": "^7.14.2",
+    "@types/jest": "^26.0.23",
+    "@typescript-eslint/eslint-plugin": "^4.23.0",
+    "@typescript-eslint/parser": "^4.23.0",
     "autoprefixer": "^10.2.5",
     "babel-eslint": "^10.1.0",
     "babel-loader": "^8.2.2",
     "babel-preset-minify": "^0.5.0",
-    "core-js": "^3.9.1",
-    "css-loader": "^5.1.1",
-    "eslint": "^7.21.0",
+    "core-js": "^3.12.1",
+    "css-loader": "^5.2.4",
+    "eslint": "^7.26.0",
     "file-loader": "^6.2.0",
-    "html-webpack-plugin": "^5.3.0",
+    "html-webpack-plugin": "^5.3.1",
     "jest": "^26.6.3",
-    "mini-css-extract-plugin": "^1.3.9",
+    "mini-css-extract-plugin": "^1.6.0",
     "optimize-css-assets-webpack-plugin": "^5.0.4",
-    "postcss": "^8.2.8",
+    "postcss": "^8.2.15",
     "postcss-loader": "^5.2.0",
-    "prettier": "^2.2.1",
+    "prettier": "^2.3.0",
     "prettier-webpack-plugin": "^1.2.0",
     "style-loader": "^2.0.0",
-    "terser-webpack-plugin": "^5.1.1",
-    "typescript": "^4.2.3",
+    "terser-webpack-plugin": "^5.1.2",
+    "typescript": "^4.2.4",
     "url-loader": "^4.1.1",
-    "webpack": "^5.24.3",
-    "webpack-cli": "^4.5.0",
-    "webpack-dev-server": "4.0.0-beta.0"
+    "webpack": "^5.37.0",
+    "webpack-cli": "^4.7.0",
+    "webpack-dev-server": "4.0.0-beta.3"
   },
   "jest": {
     "roots": [

src/lib/components/CandidateBox.ts

@@ -9,7 +9,7 @@ import {
 
 class CandidateBox {
   utilities: Utilities;
-  candidateBoxElement: HTMLDivElement;
+  candidateBoxElement!: HTMLDivElement;
   pageIndex = 0;
   pageSize;
 

src/lib/components/Keyboard.ts

@@ -22,28 +22,29 @@ import CandidateBox from "./CandidateBox";
  * - Handles button functionality
  */
 class SimpleKeyboard {
-  input: KeyboardInput;
-  options: KeyboardOptions;
+  input!: KeyboardInput;
+  options!: KeyboardOptions;
   utilities: any;
-  caretPosition: number;
-  caretPositionEnd: number;
-  keyboardDOM: KeyboardElement;
-  keyboardPluginClasses: string;
-  keyboardDOMClass: string;
-  buttonElements: KeyboardButtonElements;
-  currentInstanceName: string;
-  allKeyboardInstances: { [key: string]: SimpleKeyboard };
-  keyboardInstanceNames: string[];
-  isFirstKeyboardInstance: boolean;
-  physicalKeyboard: PhysicalKeyboard;
-  modules: { [key: string]: any };
-  activeButtonClass: string;
-  holdInteractionTimeout: number;
-  holdTimeout: number;
-  isMouseHold: boolean;
-  initialized: boolean;
-  candidateBox: CandidateBox;
-  keyboardRowsDOM: KeyboardElement;
+  caretPosition!: number | null;
+  caretPositionEnd!: number | null;
+  keyboardDOM!: KeyboardElement;
+  keyboardPluginClasses!: string;
+  keyboardDOMClass!: string;
+  buttonElements!: KeyboardButtonElements;
+  currentInstanceName!: string;
+  allKeyboardInstances!: { [key: string]: SimpleKeyboard };
+  keyboardInstanceNames!: string[];
+  isFirstKeyboardInstance!: boolean;
+  physicalKeyboard!: PhysicalKeyboard;
+  modules!: { [key: string]: any };
+  activeButtonClass!: string;
+  holdInteractionTimeout!: number;
+  holdTimeout!: number;
+  isMouseHold!: boolean;
+  initialized!: boolean;
+  candidateBox!: CandidateBox | null;
+  keyboardRowsDOM!: KeyboardElement;
+  defaultName = "default";
 
   /**
    * Creates an instance of SimpleKeyboard
@@ -159,8 +160,9 @@ class SimpleKeyboard {
      * @property {object} default Default SimpleKeyboard internal input.
      * @property {object} myInputName Example input that can be set through `options.inputName:"myInputName"`.
      */
+    const { inputName = this.defaultName } = this.options;
     this.input = {};
-    this.input[this.options.inputName] = "";
+    this.input[inputName] = "";
 
     /**
      * @type {string} DOM class of the keyboard wrapper, normally "simple-keyboard" by default.
@@ -231,7 +233,7 @@ class SimpleKeyboard {
   ): {
     keyboardDOMClass: string;
     keyboardDOM: KeyboardElement;
-    options: Partial<KeyboardOptions>;
+    options: Partial<KeyboardOptions | undefined>;
   } => {
     let keyboardDOMClass;
     let keyboardDOM;
@@ -287,15 +289,15 @@ class SimpleKeyboard {
    * Getters
    */
   getOptions = (): KeyboardOptions => this.options;
-  getCaretPosition = (): number => this.caretPosition;
-  getCaretPositionEnd = (): number => this.caretPositionEnd;
+  getCaretPosition = (): number | null => this.caretPosition;
+  getCaretPositionEnd = (): number | null => this.caretPositionEnd;
 
   /**
    * Changes the internal caret position
    * @param {number} position The caret's start position
    * @param {number} positionEnd The caret's end position
    */
-  setCaretPosition(position: number, endPosition = position): void {
+  setCaretPosition(position: number | null, endPosition = position): void {
     this.caretPosition = position;
     this.caretPositionEnd = endPosition;
   }
@@ -379,8 +381,7 @@ class SimpleKeyboard {
    * @param  {string} button The button's layout name.
    */
   handleButtonClicked(button: string, e?: KeyboardHandlerEvent): void {
-    const debug = this.options.debug;
-
+    const { inputName = this.defaultName, debug } = this.options;
     /**
      * Ignoring placeholder buttons
      */
@@ -389,15 +390,14 @@ class SimpleKeyboard {
     /**
      * Creating inputName if it doesn't exist
      */
-    if (!this.input[this.options.inputName])
-      this.input[this.options.inputName] = "";
+    if (!this.input[inputName]) this.input[inputName] = "";
 
     /**
      * Calculating new input
      */
     const updatedInput = this.utilities.getUpdatedInput(
       button,
-      this.input[this.options.inputName],
+      this.input[inputName],
       this.caretPosition,
       this.caretPositionEnd
     );
@@ -410,7 +410,7 @@ class SimpleKeyboard {
 
     if (
       // If input will change as a result of this button press
-      this.input[this.options.inputName] !== updatedInput &&
+      this.input[inputName] !== updatedInput &&
       // This pertains to the "inputPattern" option:
       // If inputPattern isn't set
       (!this.options.inputPattern ||
@@ -432,7 +432,7 @@ class SimpleKeyboard {
        */
       const newInputValue = this.utilities.getUpdatedInput(
         button,
-        this.input[this.options.inputName],
+        this.input[inputName],
         this.caretPosition,
         this.caretPositionEnd,
         true
@@ -483,7 +483,7 @@ class SimpleKeyboard {
             this.keyboardDOM
           );
         } else {
-          this.candidateBox.destroy();
+          this.candidateBox?.destroy();
         }
       }
     }
@@ -639,8 +639,9 @@ class SimpleKeyboard {
    * Clear the keyboard’s input.
    * @param {string} [inputName] optional - the internal input to select
    */
-  clearInput(inputName: string): void {
-    inputName = inputName || this.options.inputName;
+  clearInput(
+    inputName: string = this.options.inputName || this.defaultName
+  ): void {
     this.input[inputName] = "";
 
     /**
@@ -658,7 +659,10 @@ class SimpleKeyboard {
    * Get the keyboard’s input (You can also get it from the onChange prop).
    * @param  {string} [inputName] optional - the internal input to select
    */
-  getInput(inputName = this.options.inputName, skipSync = false): string {
+  getInput(
+    inputName: string = this.options.inputName || this.defaultName,
+    skipSync = false
+  ): string {
     /**
      * Enforce syncInstanceInputs, if set
      */
@@ -697,7 +701,7 @@ class SimpleKeyboard {
    */
   setInput(
     input: string,
-    inputName = this.options.inputName,
+    inputName: string = this.options.inputName || this.defaultName,
     skipSync?: boolean
   ): void {
     this.input[inputName] = input;
@@ -758,19 +762,6 @@ class SimpleKeyboard {
    * @param  {object} options The options to set
    */
   onSetOptions(changedOptions: string[] = []): void {
-    /**
-     * Changed: inputName
-     */
-    if (changedOptions.includes("inputName")) {
-      /**
-       * inputName changed. This requires a caretPosition reset
-       */
-      if (this.options.debug) {
-        console.log("inputName changed. caretPosition reset.");
-      }
-      this.setCaretPosition(null);
-    }
-
     /**
      * Changed: layoutName
      */
@@ -851,7 +842,7 @@ class SimpleKeyboard {
          * If class is already defined, we add button to class definition
          */
         this.options.buttonTheme.map((buttonTheme) => {
-          if (buttonTheme.class.split(" ").includes(classNameItem)) {
+          if (buttonTheme?.class.split(" ").includes(classNameItem)) {
             classNameFound = true;
 
             const buttonThemeArray = buttonTheme.buttons.split(" ");
@@ -904,26 +895,28 @@ class SimpleKeyboard {
     ) {
       const buttonArray = buttons.split(" ");
       buttonArray.forEach((button) => {
-        this.options.buttonTheme.map((buttonTheme, index) => {
+        this.options?.buttonTheme?.map((buttonTheme, index) => {
           /**
            * If className is set, we affect the buttons only for that class
            * Otherwise, we afect all classes
            */
           if (
-            (className && className.includes(buttonTheme.class)) ||
+            (buttonTheme &&
+              className &&
+              className.includes(buttonTheme.class)) ||
             !className
           ) {
-            const filteredButtonArray = buttonTheme.buttons
+            const filteredButtonArray = buttonTheme?.buttons
               .split(" ")
               .filter((item) => item !== button);
 
             /**
              * If buttons left, return them, otherwise, remove button Theme
              */
-            if (filteredButtonArray.length) {
+            if (buttonTheme && filteredButtonArray?.length) {
               buttonTheme.buttons = filteredButtonArray.join(" ");
             } else {
-              this.options.buttonTheme.splice(index, 1);
+              this.options.buttonTheme?.splice(index, 1);
               buttonTheme = null;
             }
           }
@@ -940,7 +933,9 @@ class SimpleKeyboard {
    * Get the DOM Element of a button. If there are several buttons with the same name, an array of the DOM Elements is returned.
    * @param  {string} button The button layout name to select
    */
-  getButtonElement(button: string): KeyboardElement | KeyboardElement[] {
+  getButtonElement(
+    button: string
+  ): KeyboardElement | KeyboardElement[] | undefined {
     let output;
 
     const buttonArr = this.buttonElements[button];
@@ -969,7 +964,8 @@ class SimpleKeyboard {
     if (inputPatternRaw instanceof RegExp) {
       inputPattern = inputPatternRaw;
     } else {
-      inputPattern = inputPatternRaw[this.options.inputName];
+      inputPattern =
+        inputPatternRaw[this.options.inputName || this.defaultName];
     }
 
     if (inputPattern && inputVal) {
@@ -1077,10 +1073,11 @@ class SimpleKeyboard {
       }
 
       if (
-        (targetTagName === "textarea" || targetTagName === "input") &&
-        ["text", "search", "url", "tel", "password"].includes(
-          event.target.type
-        ) &&
+        (targetTagName === "textarea" ||
+          (targetTagName === "input" &&
+            ["text", "search", "url", "tel", "password"].includes(
+              event.target.type
+            ))) &&
         !instance.options.disableCaretPositioning
       ) {
         /**
@@ -1106,6 +1103,13 @@ class SimpleKeyboard {
          * If we toggled off disableCaretPositioning, we must ensure caretPosition doesn't persist once reactivated.
          */
         instance.setCaretPosition(null);
+
+        if (instance.options.debug) {
+          console.log(
+            `Caret position reset due to "${event?.type}" event`,
+            event
+          );
+        }
       }
     });
   }
@@ -1146,26 +1150,25 @@ class SimpleKeyboard {
     /**
      * Remove buttons
      */
-    let deleteButton = (buttonElement: KeyboardElement) => {
-      buttonElement.onpointerdown = null;
-      buttonElement.onpointerup = null;
-      buttonElement.onpointercancel = null;
-      buttonElement.ontouchstart = null;
-      buttonElement.ontouchend = null;
-      buttonElement.ontouchcancel = null;
-      buttonElement.onclick = null;
-      buttonElement.onmousedown = null;
-      buttonElement.onmouseup = null;
+    const deleteButton = (buttonElement: KeyboardElement | null) => {
+      if (buttonElement) {
+        buttonElement.onpointerdown = null;
+        buttonElement.onpointerup = null;
+        buttonElement.onpointercancel = null;
+        buttonElement.ontouchstart = null;
+        buttonElement.ontouchend = null;
+        buttonElement.ontouchcancel = null;
+        buttonElement.onclick = null;
+        buttonElement.onmousedown = null;
+        buttonElement.onmouseup = null;
 
-      buttonElement.remove();
-      buttonElement = null;
+        buttonElement.remove();
+        buttonElement = null;
+      }
     };
 
     this.recurseButtons(deleteButton);
 
-    this.recurseButtons = null;
-    deleteButton = null;
-
     /**
      * Remove wrapper events
      */
@@ -1213,6 +1216,7 @@ class SimpleKeyboard {
     if (Array.isArray(buttonTheme)) {
       buttonTheme.forEach((themeObj) => {
         if (
+          themeObj &&
           themeObj.class &&
           typeof themeObj.class === "string" &&
           themeObj.buttons &&
@@ -1336,7 +1340,7 @@ class SimpleKeyboard {
     }
 
     if (typeof this.options.beforeFirstRender === "function")
-      this.options.beforeFirstRender();
+      this.options.beforeFirstRender(this);
 
     /**
      * Notify about PointerEvents usage
@@ -1369,7 +1373,7 @@ class SimpleKeyboard {
    */
   beforeRender() {
     if (typeof this.options.beforeRender === "function")
-      this.options.beforeRender();
+      this.options.beforeRender(this);
   }
 
   /**
@@ -1574,211 +1578,219 @@ class SimpleKeyboard {
     /**
      * Iterating through each row
      */
-    layout[this.options.layoutName].forEach((row, rIndex) => {
-      let rowArray = row.split(" ");
-
-      /**
-       * Enforce excludeFromLayout
-       */
-      if (this.options.excludeFromLayout[this.options.layoutName]) {
-        rowArray = rowArray.filter(
-          (buttonName) =>
-            !this.options.excludeFromLayout[this.options.layoutName].includes(
-              buttonName
-            )
-        );
-      }
-
-      /**
-       * Creating empty row
-       */
-      let rowDOM = document.createElement("div");
-      rowDOM.className += "hg-row";
-
-      /**
-       * Tracking container indicators in rows
-       */
-      const containerStartIndexes: number[] = [];
-      const containerEndIndexes: number[] = [];
-
-      /**
-       * Iterating through each button in row
-       */
-      rowArray.forEach((button, bIndex) => {
-        /**
-         * Check if button has a container indicator
-         */
-        const buttonHasContainerStart =
-          !disableRowButtonContainers &&
-          typeof button === "string" &&
-          button.length > 1 &&
-          button.indexOf("[") === 0;
-
-        const buttonHasContainerEnd =
-          !disableRowButtonContainers &&
-          typeof button === "string" &&
-          button.length > 1 &&
-          button.indexOf("]") === button.length - 1;
+    layout[this.options.layoutName || this.defaultName].forEach(
+      (row, rIndex) => {
+        let rowArray = row.split(" ");
 
         /**
-         * Save container start index, if applicable
+         * Enforce excludeFromLayout
          */
-        if (buttonHasContainerStart) {
-          containerStartIndexes.push(bIndex);
-
-          /**
-           * Removing indicator
-           */
-          button = button.replace(/\[/g, "");
-        }
-
-        if (buttonHasContainerEnd) {
-          containerEndIndexes.push(bIndex);
-
-          /**
-           * Removing indicator
-           */
-          button = button.replace(/\]/g, "");
-        }
-
-        /**
-         * Processing button options
-         */
-        const fctBtnClass = this.utilities.getButtonClass(button);
-        const buttonDisplayName = this.utilities.getButtonDisplayName(
-          button,
-          this.options.display,
-          this.options.mergeDisplay
-        );
-
-        /**
-         * Creating button
-         */
-        const buttonType = this.options.useButtonTag ? "button" : "div";
-        const buttonDOM = document.createElement(buttonType);
-        buttonDOM.className += `hg-button ${fctBtnClass}`;
-
-        /**
-         * Adding buttonTheme
-         */
-        buttonDOM.classList.add(...this.getButtonThemeClasses(button));
-
-        /**
-         * Adding buttonAttributes
-         */
-        this.setDOMButtonAttributes(
-          button,
-          (attribute: string, value: string) => {
-            buttonDOM.setAttribute(attribute, value);
-          }
-        );
-
-        this.activeButtonClass = "hg-activeButton";
-
-        /**
-         * Handle button click event
-         */
-        /* istanbul ignore next */
         if (
-          this.utilities.pointerEventsSupported() &&
-          !useTouchEvents &&
-          !useMouseEvents
+          this.options.excludeFromLayout &&
+          this.options.excludeFromLayout[
+            this.options.layoutName || this.defaultName
+          ]
         ) {
+          rowArray = rowArray.filter(
+            (buttonName) =>
+              this.options.excludeFromLayout &&
+              !this.options.excludeFromLayout[
+                this.options.layoutName || this.defaultName
+              ].includes(buttonName)
+          );
+        }
+
+        /**
+         * Creating empty row
+         */
+        let rowDOM = document.createElement("div");
+        rowDOM.className += "hg-row";
+
+        /**
+         * Tracking container indicators in rows
+         */
+        const containerStartIndexes: number[] = [];
+        const containerEndIndexes: number[] = [];
+
+        /**
+         * Iterating through each button in row
+         */
+        rowArray.forEach((button, bIndex) => {
           /**
-           * Handle PointerEvents
+           * Check if button has a container indicator
            */
-          buttonDOM.onpointerdown = (e: KeyboardHandlerEvent) => {
-            this.handleButtonClicked(button, e);
-            this.handleButtonMouseDown(button, e);
-          };
-          buttonDOM.onpointerup = (e: KeyboardHandlerEvent) => {
-            this.handleButtonMouseUp(button, e);
-          };
-          buttonDOM.onpointercancel = (e: KeyboardHandlerEvent) => {
-            this.handleButtonMouseUp(button, e);
-          };
-        } else {
+          const buttonHasContainerStart =
+            !disableRowButtonContainers &&
+            typeof button === "string" &&
+            button.length > 1 &&
+            button.indexOf("[") === 0;
+
+          const buttonHasContainerEnd =
+            !disableRowButtonContainers &&
+            typeof button === "string" &&
+            button.length > 1 &&
+            button.indexOf("]") === button.length - 1;
+
           /**
-           * Fallback for browsers not supporting PointerEvents
+           * Save container start index, if applicable
            */
-          if (useTouchEvents) {
+          if (buttonHasContainerStart) {
+            containerStartIndexes.push(bIndex);
+
             /**
-             * Handle touch events
+             * Removing indicator
              */
-            buttonDOM.ontouchstart = (e: KeyboardHandlerEvent) => {
+            button = button.replace(/\[/g, "");
+          }
+
+          if (buttonHasContainerEnd) {
+            containerEndIndexes.push(bIndex);
+
+            /**
+             * Removing indicator
+             */
+            button = button.replace(/\]/g, "");
+          }
+
+          /**
+           * Processing button options
+           */
+          const fctBtnClass = this.utilities.getButtonClass(button);
+          const buttonDisplayName = this.utilities.getButtonDisplayName(
+            button,
+            this.options.display,
+            this.options.mergeDisplay
+          );
+
+          /**
+           * Creating button
+           */
+          const buttonType = this.options.useButtonTag ? "button" : "div";
+          const buttonDOM = document.createElement(buttonType);
+          buttonDOM.className += `hg-button ${fctBtnClass}`;
+
+          /**
+           * Adding buttonTheme
+           */
+          buttonDOM.classList.add(...this.getButtonThemeClasses(button));
+
+          /**
+           * Adding buttonAttributes
+           */
+          this.setDOMButtonAttributes(
+            button,
+            (attribute: string, value: string) => {
+              buttonDOM.setAttribute(attribute, value);
+            }
+          );
+
+          this.activeButtonClass = "hg-activeButton";
+
+          /**
+           * Handle button click event
+           */
+          /* istanbul ignore next */
+          if (
+            this.utilities.pointerEventsSupported() &&
+            !useTouchEvents &&
+            !useMouseEvents
+          ) {
+            /**
+             * Handle PointerEvents
+             */
+            buttonDOM.onpointerdown = (e: KeyboardHandlerEvent) => {
               this.handleButtonClicked(button, e);
               this.handleButtonMouseDown(button, e);
             };
-            buttonDOM.ontouchend = (e: KeyboardHandlerEvent) => {
+            buttonDOM.onpointerup = (e: KeyboardHandlerEvent) => {
               this.handleButtonMouseUp(button, e);
             };
-            buttonDOM.ontouchcancel = (e: KeyboardHandlerEvent) => {
+            buttonDOM.onpointercancel = (e: KeyboardHandlerEvent) => {
               this.handleButtonMouseUp(button, e);
             };
           } else {
             /**
-             * Handle mouse events
+             * Fallback for browsers not supporting PointerEvents
              */
-            buttonDOM.onclick = (e: KeyboardHandlerEvent) => {
-              this.isMouseHold = false;
-              this.handleButtonClicked(button, e);
-            };
-            buttonDOM.onmousedown = (e: KeyboardHandlerEvent) => {
-              this.handleButtonMouseDown(button, e);
-            };
-            buttonDOM.onmouseup = (e: KeyboardHandlerEvent) => {
-              this.handleButtonMouseUp(button, e);
-            };
+            if (useTouchEvents) {
+              /**
+               * Handle touch events
+               */
+              buttonDOM.ontouchstart = (e: KeyboardHandlerEvent) => {
+                this.handleButtonClicked(button, e);
+                this.handleButtonMouseDown(button, e);
+              };
+              buttonDOM.ontouchend = (e: KeyboardHandlerEvent) => {
+                this.handleButtonMouseUp(button, e);
+              };
+              buttonDOM.ontouchcancel = (e: KeyboardHandlerEvent) => {
+                this.handleButtonMouseUp(button, e);
+              };
+            } else {
+              /**
+               * Handle mouse events
+               */
+              buttonDOM.onclick = (e: KeyboardHandlerEvent) => {
+                this.isMouseHold = false;
+                this.handleButtonClicked(button, e);
+              };
+              buttonDOM.onmousedown = (e: KeyboardHandlerEvent) => {
+                this.handleButtonMouseDown(button, e);
+              };
+              buttonDOM.onmouseup = (e: KeyboardHandlerEvent) => {
+                this.handleButtonMouseUp(button, e);
+              };
+            }
           }
-        }
+
+          /**
+           * Adding identifier
+           */
+          buttonDOM.setAttribute("data-skBtn", button);
+
+          /**
+           * Adding unique id
+           * Since there's no limit on spawning same buttons, the unique id ensures you can style every button
+           */
+          const buttonUID = `${this.options.layoutName}-r${rIndex}b${bIndex}`;
+          buttonDOM.setAttribute("data-skBtnUID", buttonUID);
+
+          /**
+           * Adding button label to button
+           */
+          const buttonSpanDOM = document.createElement("span");
+          buttonSpanDOM.innerHTML = buttonDisplayName;
+          buttonDOM.appendChild(buttonSpanDOM);
+
+          /**
+           * Adding to buttonElements
+           */
+          if (!this.buttonElements[button]) this.buttonElements[button] = [];
+
+          this.buttonElements[button].push(buttonDOM);
+
+          /**
+           * Appending button to row
+           */
+          rowDOM.appendChild(buttonDOM);
+        });
 
         /**
-         * Adding identifier
+         * Parse containers in row
          */
-        buttonDOM.setAttribute("data-skBtn", button);
+        rowDOM = this.parseRowDOMContainers(
+          rowDOM,
+          rIndex,
+          containerStartIndexes,
+          containerEndIndexes
+        );
 
         /**
-         * Adding unique id
-         * Since there's no limit on spawning same buttons, the unique id ensures you can style every button
+         * Appending row to hg-rows
          */
-        const buttonUID = `${this.options.layoutName}-r${rIndex}b${bIndex}`;
-        buttonDOM.setAttribute("data-skBtnUID", buttonUID);
-
-        /**
-         * Adding button label to button
-         */
-        const buttonSpanDOM = document.createElement("span");
-        buttonSpanDOM.innerHTML = buttonDisplayName;
-        buttonDOM.appendChild(buttonSpanDOM);
-
-        /**
-         * Adding to buttonElements
-         */
-        if (!this.buttonElements[button]) this.buttonElements[button] = [];
-
-        this.buttonElements[button].push(buttonDOM);
-
-        /**
-         * Appending button to row
-         */
-        rowDOM.appendChild(buttonDOM);
-      });
-
-      /**
-       * Parse containers in row
-       */
-      rowDOM = this.parseRowDOMContainers(
-        rowDOM,
-        rIndex,
-        containerStartIndexes,
-        containerEndIndexes
-      );
-
-      /**
-       * Appending row to hg-rows
-       */
-      this.keyboardRowsDOM.appendChild(rowDOM);
-    });
+        this.keyboardRowsDOM.appendChild(rowDOM);
+      }
+    );
 
     /**
      * Appending row to keyboard
@@ -1806,7 +1818,7 @@ class SimpleKeyboard {
         !useMouseEvents
       ) {
         document.onpointerup = (e: KeyboardHandlerEvent) =>
-          this.handleButtonMouseUp(null, e);
+          this.handleButtonMouseUp(undefined, e);
         this.keyboardDOM.onpointerdown = (e: KeyboardHandlerEvent) =>
           this.handleKeyboardContainerMouseDown(e);
       } else if (useTouchEvents) {
@@ -1814,9 +1826,9 @@ class SimpleKeyboard {
          * Handling ontouchend, ontouchcancel
          */
         document.ontouchend = (e: KeyboardHandlerEvent) =>
-          this.handleButtonMouseUp(null, e);
+          this.handleButtonMouseUp(undefined, e);
         document.ontouchcancel = (e: KeyboardHandlerEvent) =>
-          this.handleButtonMouseUp(null, e);
+          this.handleButtonMouseUp(undefined, e);
 
         this.keyboardDOM.ontouchstart = (e: KeyboardHandlerEvent) =>
           this.handleKeyboardContainerMouseDown(e);
@@ -1825,7 +1837,7 @@ class SimpleKeyboard {
          * Handling mouseup
          */
         document.onmouseup = (e: KeyboardHandlerEvent) =>
-          this.handleButtonMouseUp(null, e);
+          this.handleButtonMouseUp(undefined, e);
         this.keyboardDOM.onmousedown = (e: KeyboardHandlerEvent) =>
           this.handleKeyboardContainerMouseDown(e);
       }

src/lib/components/tests/Keyboard.test.js

@@ -1138,27 +1138,6 @@ it('Keyboard disableRowButtonContainers will bypass parseRowDOMContainers', () =
   expect(containers.length).toBe(0);
 });
 
-it('Keyboard inputName change will trigget caretPosition reset', () => {
-    const keyboard = new Keyboard();
-
-  keyboard.setCaretPosition(0);
-
-  keyboard.getButtonElement("q").onpointerdown();
-  keyboard.getButtonElement("1").onpointerdown();
-
-  expect(keyboard.getCaretPosition()).toBe(2);
-
-  keyboard.setOptions({
-    inputName: "myInput"
-  });
-
-  keyboard.getButtonElement("q").onpointerdown();
-  keyboard.getButtonElement("1").onpointerdown();
-  keyboard.getButtonElement("b").onpointerdown();
-
-  expect(keyboard.getCaretPosition()).toBe(null);
-});
-
 it('Keyboard destroy will work', () => {
     const keyboard = new Keyboard();
   keyboard.destroy();

src/lib/interfaces.ts

@@ -6,10 +6,10 @@ export interface KeyboardLayoutObject {
     [key: string]: string[];
 }
 
-export interface KeyboardButtonTheme {
+export type KeyboardButtonTheme = {
     class: string;
     buttons: string;
-}
+} | null;
 
 export interface KeyboardButtonAttributes {
     attribute: string;
@@ -44,7 +44,7 @@ export type CandidateBoxRenderParams = {
 }
 
 export type KeyboardElement = HTMLDivElement | HTMLButtonElement;
-export type KeyboardHandlerEvent = PointerEvent & TouchEvent & KeyboardEvent & { target: HTMLDivElement & HTMLInputElement };
+export type KeyboardHandlerEvent = any;
 
 export interface KeyboardButtonElements {
     [key: string]: KeyboardElement[]
@@ -52,8 +52,13 @@ export interface KeyboardButtonElements {
 
 export interface UtilitiesParams {
     getOptions: () => KeyboardOptions;
-    getCaretPosition: () => number;
-    getCaretPositionEnd: () => number;
+    getCaretPosition: () => number | null;
+    getCaretPositionEnd: () => number | null;
+    dispatch: any;
+}
+
+export interface PhysicalKeyboardParams {
+    getOptions: () => KeyboardOptions;
     dispatch: any;
 }
 

src/lib/services/PhysicalKeyboard.ts

@@ -1,4 +1,4 @@
-import { KeyboardOptions, UtilitiesParams } from "../interfaces";
+import { KeyboardOptions, PhysicalKeyboardParams } from "../interfaces";
 import Utilities from "../services/Utilities";
 
 /**
@@ -11,7 +11,7 @@ class PhysicalKeyboard {
   /**
    * Creates an instance of the PhysicalKeyboard service
    */
-  constructor({ dispatch, getOptions }: Partial<UtilitiesParams>) {
+  constructor({ dispatch, getOptions }: PhysicalKeyboardParams) {
     /**
      * @type {object} A simple-keyboard instance
      */

src/lib/services/Utilities.ts

@@ -6,10 +6,10 @@ import { KeyboardOptions, UtilitiesParams } from "../interfaces";
  */
 class Utilities {
   getOptions: () => KeyboardOptions;
-  getCaretPosition: () => number;
-  getCaretPositionEnd: () => number;
+  getCaretPosition: () => number | null;
+  getCaretPositionEnd: () => number | null;
   dispatch: any;
-  maxLengthReached: boolean;
+  maxLengthReached!: boolean;
 
   /**
    * Creates an instance of the Utility service
@@ -106,6 +106,7 @@ class Utilities {
       "{home}": "home",
       "{pageup}": "up",
       "{delete}": "del",
+      "{forwarddelete}": "del",
       "{end}": "end",
       "{pagedown}": "down",
       "{numpadmultiply}": "*",
@@ -177,6 +178,11 @@ class Utilities {
       output.length > 0
     ) {
       output = this.removeAt(output, ...commonParams);
+    } else if (
+      (button === "{delete}" || button === "{forwarddelete}") &&
+      output.length > 0
+    ) {
+      output = this.removeForwardsAt(output, ...commonParams);
     } else if (button === "{space}")
       output = this.addStringAt(output, " ", ...commonParams);
     else if (
@@ -243,10 +249,12 @@ class Utilities {
     const options = this.getOptions();
     let caretPosition = this.getCaretPosition();
 
-    if (minus) {
-      if (caretPosition > 0) caretPosition = caretPosition - length;
-    } else {
-      caretPosition = caretPosition + length;
+    if (caretPosition != null) {
+      if (minus) {
+        if (caretPosition > 0) caretPosition = caretPosition - length;
+      } else {
+        caretPosition = caretPosition + length;
+      }
     }
 
     if (options.debug) {
@@ -292,7 +300,7 @@ class Utilities {
   }
 
   /**
-   * Removes an amount of characters at a given position
+   * Removes an amount of characters before a given position
    *
    * @param  {string} source The source input
    * @param  {number} position The (cursor) position from where the characters should be removed
@@ -353,6 +361,65 @@ class Utilities {
 
     return output;
   }
+
+  /**
+   * Removes an amount of characters after a given position
+   *
+   * @param  {string} source The source input
+   * @param  {number} position The (cursor) position from where the characters should be removed
+   */
+  removeForwardsAt(
+    source: string,
+    position = source.length,
+    positionEnd = source.length,
+    moveCaret = false
+  ) {
+    if (position === 0 && positionEnd === 0) {
+      return source;
+    }
+
+    let output;
+
+    if (position === positionEnd) {
+      let nextTwoChars;
+      let emojiMatched;
+      const emojiMatchedReg = /([\uD800-\uDBFF][\uDC00-\uDFFF])/g;
+
+      /**
+       * Emojis are made out of two characters, so we must take a custom approach to trim them.
+       * For more info: https://mathiasbynens.be/notes/javascript-unicode
+       */
+      if (position && position >= 0) {
+        nextTwoChars = source.substring(position, position + 2);
+        emojiMatched = nextTwoChars.match(emojiMatchedReg);
+
+        if (emojiMatched) {
+          output = source.substr(0, position) + source.substr(position + 2);
+        } else {
+          output = source.substr(0, position) + source.substr(position + 1);
+        }
+      } else {
+        nextTwoChars = source.slice(2);
+        emojiMatched = nextTwoChars.match(emojiMatchedReg);
+
+        if (emojiMatched) {
+          output = source.slice(0, 2);
+        } else {
+          output = source.slice(0, 1);
+        }
+      }
+    } else {
+      output = source.slice(0, position) + source.slice(positionEnd);
+      if (moveCaret) {
+        this.dispatch((instance: any) => {
+          instance.setCaretPosition(position);
+        });
+      }
+    }
+
+    return output;
+  }
+
   /**
    * Determines whether the maxLength has been reached. This function is called when the maxLength option it set.
    *
@@ -362,7 +429,7 @@ class Utilities {
   handleMaxLength(inputObj: KeyboardInput, updatedInput: string) {
     const options = this.getOptions();
     const maxLength = options.maxLength;
-    const currentInput = inputObj[options.inputName];
+    const currentInput = inputObj[options.inputName || "default"];
     const condition = updatedInput.length - 1 >= maxLength;
 
     if (
@@ -393,7 +460,8 @@ class Utilities {
     }
 
     if (typeof maxLength === "object") {
-      const condition = updatedInput.length - 1 >= maxLength[options.inputName];
+      const condition =
+        updatedInput.length - 1 >= maxLength[options.inputName || "default"];
 
       if (options.debug) {
         console.log("maxLength (obj) reached:", condition);
@@ -451,7 +519,7 @@ class Utilities {
    * @param  {string} str The string to transform.
    */
   camelCase(str: string): string {
-    if (!str) return;
+    if (!str) return "";
 
     return str
       .toLowerCase()

src/lib/services/tests/Utilities.test.js

@@ -34,6 +34,16 @@ it('Keyboard {bksp} button will work', () => {
   expect(output).toBe("tes");
 });
 
+it('Keyboard {delete} button will work', () => {
+  setDOM();
+
+  const keyboard = new Keyboard();
+
+  const output = keyboard.utilities.getUpdatedInput("{delete}", "test", 1);
+  
+  expect(output).toBe("tst");
+});
+
 it('Keyboard {space} button will work', () => {
   setDOM();
 

tsconfig.json

@@ -11,7 +11,8 @@
       "suppressImplicitAnyIndexErrors": true,
       "lib": ["es2020", "dom"],
       "moduleResolution": "node",
-      "downlevelIteration": true
+      "downlevelIteration": true,
+      "strict": true
     },
     "include": ["src/lib"],
     "exclude": ["src/lib/**/tests"],

webpack.config.js

@@ -27,6 +27,7 @@ const banner = `
 module.exports = {
   mode: "production",
   entry: './src/lib/index.ts',
+  target: 'es5',
   output: {
     filename: 'index.js',
     path: path.resolve(__dirname, 'build'),