Show DevBest Key Code Converter [JavaScript]

[Markshall]

If you've ever made a web app that involves users having to press keys to perform commands on the website, such as pressing Escape to close a modal dialog box, you'll most likely often find yourself forgetting the numerical values to the key codes, I know I do.

So to 'tackle' that I went away and coded a little function that returns a boolean/object based on the key name rather than a number.

The function will return either a boolean or an object containing the name of the key, whether it is a letter, number, F key (f1-f12) and a symbol depending on which way you use the function.

Some characters have multiple names, for example:

Caps lock button can be called capslock or caps
Delete button can be called delete or del
Backspace can be called backspace or bs
Escape can be called escape or es

Note: I haven't tested this in full production so who knows, maybe some key codes could be different across different operating systems so be careful how dependant you are on this if you decide to use it.

Below I will demonstrate some example uses

<script>
document.getElementById('search').onkeyup = function(e) {
    console.log(convertKeyCode(e.keyCode));
};
</script>

Result:

{
    result: ['semicolon', 'scolon'],
    isLetter: false,
    isNumber: false,
    isFKey: false,
    isSymbol: true
}

<script>
document.getElementById('search').onkeyup = function(e) {
    if (convertKeyCode(e.keyCode, 'esc')) {
        //user clicked Escape key, close modal
    } else {
        //user clicked a different key, do nothing.
    }
};
</script>

Result:

true if user clicks escape key
false if user clicks a different key

It is minified because it's quite long:

function convertKeyCode(e,s){var r={result:"n/a",isFKey:!1,isLetter:!1,isNumber:!1,isSymbol:!1};switch(e){case 8:r.result=["backspace","bs"];break;case 9:r.result="tab";break;case 13:r.result=["enter","return"];break;case 16:r.result="shift";break;case 17:r.result="ctrl";break;case 18:r.result="alt";break;case 19:r.result=["pause","break"];break;case 20:r.result=["capslock","caps"];break;case 27:r.result=["escape","esc"];break;case 32:r.result="space";break;case 33:r.result=["pageup","pup","pgup"];break;case 34:r.result=["pagedown","pdown","pgdown"];break;case 35:r.result="end";break;case 36:r.result="home";break;case 37:r.result=["leftarrow","larrow"];break;case 38:r.result=["uparrow","uarrow"];break;case 39:r.result=["rightarrow","rarrow"];break;case 40:r.result=["downarrow","darrow"];break;case 45:r.result=["insert","ins"];break;case 46:r.result=["delete","del"];break;case 48:r.result=["0","nought","zero"],r.isNumber=!0;break;case 49:r.result=["1","one"],r.isNumber=!0;break;case 50:r.result=["2","two"],r.isNumber=!0;break;case 51:r.result=["3","three"],r.isNumber=!0;break;case 52:r.result=["4","four"],r.isNumber=!0;break;case 53:r.result=["5","five"],r.isNumber=!0;break;case 54:r.result=["6","six"],r.isNumber=!0;break;case 55:r.result=["7","seven"],r.isNumber=!0;break;case 56:r.result=["8","eight"],r.isNumber=!0;break;case 57:r.result=["9","nine"],r.isNumber=!0;break;case 65:r.result="a",r.isLetter=!0;break;case 66:r.result="b",r.isLetter=!0;break;case 67:r.result="c",r.isLetter=!0;break;case 68:r.result="d",r.isLetter=!0;break;case 69:r.result="e",r.isLetter=!0;break;case 70:r.result="f",r.isLetter=!0;break;case 71:r.result="g",r.isLetter=!0;break;case 72:r.result="h",r.isLetter=!0;break;case 73:r.result="i",r.isLetter=!0;break;case 74:r.result="j",r.isLetter=!0;break;case 75:r.result="k",r.isLetter=!0;break;case 76:r.result="l",r.isLetter=!0;break;case 77:r.result="m",r.isLetter=!0;break;case 78:r.result="n",r.isLetter=!0;break;case 79:r.result="o",r.isLetter=!0;break;case 80:r.result="p",r.isLetter=!0;break;case 81:r.result="q",r.isLetter=!0;break;case 82:r.result="r",r.isLetter=!0;break;case 83:r.result="s",r.isLetter=!0;break;case 84:r.result="t",r.isLetter=!0;break;case 85:r.result="u",r.isLetter=!0;break;case 86:r.result="v",r.isLetter=!0;break;case 87:r.result="w",r.isLetter=!0;break;case 88:r.result="x",r.isLetter=!0;break;case 89:r.result="y",r.isLetter=!0;break;case 90:r.result="z",r.isLetter=!0;break;case 93:r.result="select";break;case 96:r.result=["numpad0","numpadnought","numpadzero"],r.isNumber=!0;break;case 97:r.result=["numpad1","numpadone"],r.isNumber=!0;break;case 98:r.result=["numpad2","numpadtwo"],r.isNumber=!0;break;case 99:r.result=["numpad3","numpadthree"],r.isNumber=!0;break;case 100:r.result=["numpad4","numpadfour"],r.isNumber=!0;break;case 101:r.result=["numpad5","numpadfive"],r.isNumber=!0;break;case 102:r.result=["numpad6","numpadsix"],r.isNumber=!0;break;case 103:r.result=["numpad7","numpadseven"],r.isNumber=!0;break;case 104:r.result=["numpad8","numpadeight"],r.isNumber=!0;break;case 105:r.result=["numpad9","numpadnine"],r.isNumber=!0;break;case 110:r.result=["decimal","decpoint","decimalpoint"],r.isSymbol=!0;break;case 112:r.result="f1",r.isFKey=!0;break;case 113:r.result="f2",r.isFKey=!0;break;case 114:r.result="f3",r.isFKey=!0;break;case 115:r.result="f4",r.isFKey=!0;break;case 116:r.result="f5",r.isFKey=!0;break;case 117:r.result="f6",r.isFKey=!0;break;case 118:r.result="f7",r.isFKey=!0;break;case 119:r.result="f8",r.isFKey=!0;break;case 120:r.result="f9",r.isFKey=!0;break;case 121:r.result="f10",r.isFKey=!0;break;case 122:r.result="f11",r.isFKey=!0;break;case 123:r.result="f12",r.isFKey=!0;break;case 144:r.result=["numlock","nlock"];break;case 145:r.result=["scrolllock","slock"];break;case 186:r.result=["semicolon","scolon"];break;case 187:r.result=["equals","equal"];break;case 188:r.result="comma",r.isSymbol=!0;break;case 189:r.result="dash",r.isSymbol=!0;break;case 190:r.result=["period","fs","fullstop"],r.isSymbol=!0;break;case 191:r.result=["forwardslash","fslash"],r.isSymbol=!0;break;case 220:r.result=["backslash","bslash"],r.isSymbol=!0;break;case 192:r.result=["apostrophe","apos","singlequote","squote"],r.isSymbol=!0;break;case 219:r.result=["openbracket","obracket"],r.isSymbol=!0;break;case 221:r.result=["closebracket","cbracket"],r.isSymbol=!0;break;case 222:r.result=["hash","#"],r.isSymbol=!0}return s&&(r=r.result.indexOf(s.toLowerCase())>=0?!0:!1),r}

Hope it helps, if you use it.

Note 2: do not use the function like this

if (convertKeyCode(e.keyCode).result === 'esc') {

...simply because, as mentioned above, some keys have multiple names so are stored in an array.

 

[Sysode]

Nice work nerd. Who'd have thought a pisshead could produce something of this quality - rehab's treating you well eh?

Not sure what use I'd have for this any time soon but I'm sure others will at some point.

 

[Markshall]

Nice work nerd. Who'd have thought a pisshead could produce something of this quality - rehab's treating you well eh?

Not sure what use I'd have for this any time soon but I'm sure others will at some point.

Lmao nice one. Been working onsomething lately that required me to code it so thought fuck it