How to switch keyboard layout between Russian and English using JavaScript 04.08.23

```javascript
'use strict';

var map = {
    ru: [ "й", "ц", "у", "к", "е", "н", "г", "ш", "щ", "з", "х", "ъ", "ф", "ы", "в", "а", "п", "р", "о", "л", "д", "ж", "э", "я", "ч", "с", "м", "и", "т", "ь", "б", "ю" ],
    en: [ "q", "w", "e", "r", "t", "y", "u", "i", "o", "p", "[", "]", "a", "s", "d", "f", "g", "h", "j", "k", "l", ";", "'", "z", "x", "c", "v", "b", "n", "m", ",", "." ]
};

var ru = document.getElementById( 'ru' );
var en = document.getElementById( 'en' );

ru.__lang = [ 'ru', 'en' ];
en.__lang = [ 'en', 'ru' ];

ru.addEventListener( 'keydown', setInputText );
en.addEventListener( 'keydown', setInputText );

function setInputText ( e ) {
    var i, k = e.key,
            start = this.selectionStart,
            end = this.selectionEnd;

if ( ( i = map[this.__lang[1]].indexOf( k ) ) !== -1 ) {
        e.preventDefault();
        this.setRangeText( map[this.__lang[0]][i], start, end );
        this.setSelectionRange( start + 1, start + 1 );
    }
    else if ( ( i = map[this.__lang[1]].indexOf( k.toLowerCase() ) ) !== -1 ) {
        e.preventDefault();
        this.setRangeText( map[this.__lang[0]][i].toUpperCase(), start, end );
        this.setSelectionRange( start + 1, start + 1 );
    }
}
```

```html
<!DOCTYPE html>
<html>
    <head>
        <title>keyboard-layout</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <style>
            input {
                display: block;
                width: 300px;
                margin: 10px;
            }
        </style>
    </head>
    <body>
        <h1>Keyboard layout</h1>
        <label for="ru">ru</label>
        <input type="text" id="ru">
        <label for="en">en</label>
        <input type="text" id="en">
        <script src="keyboard-layout.js" type="application/javascript"></script>
    </body>
</html>
```

https://ru.stackoverflow.com/questions/948326

Anonymous

How to switch keyboard layout between Russian and English using JavaScript 04.08.23

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