Javascript function aliasing without .apply

Question

I read this, and I understand it, but, is there a way to attach a function to always execute a function alias on a specific scope, without the user of the function alias have to use the sort of clunky .apply stuff?

without using apply, call or other library binding build in functions? — Shlomi Komemi, Jun 18 '11 at 09:15
Alnitak - the OP doesn't mean context either, at least not for any meaning that is consistent with ECMA-262 . — RobG, Jun 18 '11 at 09:31
I don't want $.apply("document", ["func"]), I want, $.func(); — Dhaivat Pandya, Jun 20 '11 at 07:13

Felix Kling · Accepted Answer · 2011-06-18T09:22:56.727

You can use the new ECMAScript 5 .bind() method. An alternative implementation for browsers that don't support it (taken from the MDC documentation I linked to):

// Function.prototype.bind polyfill
if ( !Function.prototype.bind ) {

  Function.prototype.bind = function( obj ) {
    if(typeof this !== 'function') // closest thing possible to the ECMAScript 5 internal IsCallable function
      throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');

    var slice = [].slice,
        args = slice.call(arguments, 1), 
        self = this, 
        nop = function () {}, 
        bound = function () {
          return self.apply( this instanceof nop ? this : ( obj || {} ), 
                              args.concat( slice.call(arguments) ) );    
        };

    bound.prototype = this.prototype;

    return bound;
  };
}

Javascript function aliasing without .apply

1 Answers1