JSFiddle - React, Tailwind, and code Playground

by jfriend00

HTML

Type here and see it automatically expand: <input id="code" type="text" /><br>
Type here and see it automatically adjust both ways: <input id="code2" type="text" /><br><br>

Also notice that drag/drop and copy/paste trigger the width change too.

CSS

#code, #code2 {
    width:16px;
}

JavaScript

(function($) {

    var isIE = false;
    // conditional compilation which tells us if this is IE
    /*@cc_on
    isIE = true;
    @*/

    // Events to monitor if 'input' event is not supported
    // The boolean value is whether we have to 
    // re-check after the event with a setTimeout()
    var events = [
        "keyup", false,
        "blur", false,
        "focus", false,
        "drop", true,
        "change", false,
        "input", false,
        "textInput", false,
        "paste", true,
        "cut", true,
        "copy", true,
        "contextmenu", true
    ];
    // Test if the input event is supported
    // It's too buggy in IE so we never rely on it in IE
    if (!isIE) {
        var el = document.createElement("input");
        var gotInput = ("oninput" in el);
        if  (!gotInput) {
            el.setAttribute("oninput", 'return;');
            gotInput = typeof el["oninput"] == 'function';
        }
        el = null;
        // if 'input' event is supported, then use a smaller
        // set of events
        if (gotInput) {
            events = [
                "input", false,
                "textInput", false
            ];
        }
    }

    $.fn.userChange = function(fn, data) {
        function checkNotify(e, delay) {
            var self = this;
            var this$ = $(this);

            if (this.value !== this$.data("priorValue")) {
                this$.data("priorValue", this.value);
                fn.call(this, e, data);
            } else if (delay) {
                // The actual data change happens aftersome events
                // so we queue a check for after
                // We need a copy of e for setTimeout() because the real e
                // may be overwritten before the setTimeout() fires
                var eCopy = $.extend({}, e);
                setTimeout(function() {checkNotify.call(self, eCopy, false)}, 1);
            }
        }

        // hook up event handlers for each item in this...