javascript - How does jquery proxy work -

i more curious else. how pass context function. wrap function in object? sure there simple straightforward code doing in js without jquery proxy

function abc(){   console.log(this.name); } var obj={name:"something"}; $.proxy(abc,obj); 

how can without jquery proxy?

without jquery may use bind :

var newfunction = abc.bind(obj); 

and if want compatible ie8, may do

var newfunction = function(){ abc.call(obj) }; 

here's how jquery :

// bind function context, optionally partially applying // arguments. proxy: function( fn, context ) {     var args, proxy, tmp;      if ( typeof context === "string" ) {         tmp = fn[ context ];         context = fn;         fn = tmp;     }      // quick check determine if target callable, in spec     // throws typeerror, return undefined.     if ( !jquery.isfunction( fn ) ) {         return undefined;     }      // simulated bind     args = core_slice.call( arguments, 2 );     proxy = function() {         return fn.apply( context || this, args.concat( core_slice.call( arguments ) ) );     };      // set guid of unique handler same of original handler, can removed     proxy.guid = fn.guid = fn.guid || jquery.guid++;      return proxy; },