bottomDollar

bottomDollar.js

/**
Currently non-functional lite jQuery drop-in replacement.

"Bottom Dollar" as name is to express there being a bargain for the 
amount of code, and the "_$" convention also spells this out).

@ todos
1. Replace __noSuchMethod__ with Proxy
*/
var _$;
if (typeof _$ === 'undefined') {
    _$ = function _$ (obj) {
        switch (typeof obj) {
            case 'string':
                if (obj.charAt(0) === '<') { // We could add detection from fragments
                    this[0] = new DOMParser().parseFromString(obj, 'text/html').documentElement;
                }
                else {
                    Array.from(document.querySelectorAll(obj)).forEach(function (elem, idx) {
                        this[idx] = elem;
                    }, this);
                }
                return this;
            case 'function':
                window.addEventListener('DOMContentLoaded', obj);
                return this;
        }
    };
    $.ajax = function (opts) {
        var data = opts.data, 
            req = new XMLHttpRequest();
        data = data ? Object.keys(data).map(function (key) {
            encodeURIComponent(key) + '=' + encodeURIComponent(data[key]);
        }).join('&') : null;
        req.onreadystatechange = function () {
            if (req.readyState === 4) {
                if (req.status === 200) {
                    opts.success(req.responseText, req.status, req); // Not identical to jQuery
                }
                else {
                    opts.error(req, req.status); // Not identical to jQuery
                }
            }
        };
        req.open(opts.type, opts.url, true);
        req.send(data);
    };
    _$.__noSuchMethod__ = function (method, args) { // ECMAScript version??
        if ((/^click|dblclick|mousedown|mouseup|mouseover|mousemove|mouseout|keydown|keypress|keyup|load|unload|abort|error|resize|scroll|select|change|submit|reset|focus|blur|focusin|focusout$/).
                test(method)) {
            var i = 0;
            while (this[i]) {
                this[i++].addEventListener(method, args[0], false);
            }
        }
        throw 'Calling an recognized method on _$';
    };
}