What is the difference between call and apply?

Question

What is the difference between using call and apply to invoke a function?

var func = function() {
  alert(\'hello!\');
};
         


        

Answer 1

While this is an old topic, I just wanted to point out that .call is slightly faster than .apply. I can't tell you exactly why.

See jsPerf, http://jsperf.com/test-call-vs-apply/3

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[UPDATE!]

Douglas Crockford mentions briefly the difference between the two, which may help explain the performance difference... http://youtu.be/ya4UHuXNygM?t=15m52s

Apply takes an array of arguments, while Call takes zero or more individual parameters! Ah hah!

.apply(this, [...])

.call(this, param1, param2, param3, param4...)