func.apply

Already we saw about call and its expecting comma separated parameters. But in apply we should pass array arguments.

A simple example,

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function say(time, phrase) { alert(`[${time}] ${this.name}: ${phrase}`); } let user = { name: "John" }; let arrayData = ['10:00', 'Hello']; say.apply(user, arrayData);

Explanation :

1. We are using apply at line no 9. Here user is our context and arrayData is array arguments for this apply.

2. In the arrayData 10:00 will be considered as time and phrase will be considered as Hello.

3. After executing lie no 9 control moves to line 1 to execute a method say and will print the output.