WebReflection / Caller Of
Licence: wtfpl
The tiniest yet most powerful JS utility ever :D
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caller-of
The tiniest yet most powerful JS utility ever :D
/** WTFPL Style License */
function callerOf(c) {return c.call.bind(c)}
What Does Above Code Do
Here is what we usually do
object.hasOwnProperty(key)
Here is what callerOf
create
hasOwnProperty(object, key)
so we can borrow any method at any time and reuse it in a minifier friendly way.
var bind = callerOf(Function.bind);
// easy log
var log = bind(console.log, console);
log('it works');
// common borrowed methods
var
has = callerOf({}.hasOwnProperty),
whoIs = callerOf({}.toString),
forEach = callerOf([].forEach),
slice = callerOf([].slice);
has({a:1}, "a"); // true
has({a:1}, "toString"); // false
whoIs([]); // "[object Array]"
whoIs(false); // "[object Boolean]"
slice(document.querySelectorAll("*")); // array
(function (obj){
var args = slice(arguments, 1);
}());
forEach(document.getElementsByTagName("body"), log);
Compatibility
Every JavaScript engine I know, included IE.
For node.js simply npm install caller-of
then var callerOf = require('caller-of')
What If No Function.prototype.bind
You can use this tiny yet working polyfill ^_^
// 139 bytes gzipped
/*! (C) WebReflection, Mit Style License */
(function (P) {
'use strict';
if (!P.bind) {
P.bind = function (s) {
var
c = this,
l = [].slice,
a = l.call(arguments, 1);
return function bind() {
return c.apply(s, a.concat(l.call(arguments)));
};
};
}
}(Function.prototype));
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