Application () method in JavaScript _javascript skills

We talked about the Javascript call method, and this time we're going to say the Apply method like say and called.

Apply vs Call

The difference between the two is whether a parameter is passed, or an array of arguments

This is the use of call.

Copy Code code as follows:

Thefunction.call (Valueforthis, arg1, arg2, ...)

And this is the Apply

Copy Code code as follows:

Thefunction.apply (Valueforthis, Arrayofargs)

So

Copy Code code as follows:

Arrayofargs = [Arg1, arg2, ...];

Javascript Apply Method

Let's take a look at the previous call usage.

Copy Code code as follows:

function Print (p1, p2) {
Console.log (p1 + ' + p2 ');
}
Print.call (Undefined, "Hello", "World");

By the above narrative, we can conclude that when

Copy Code code as follows:

args = "Hello", "World";
function Print (p1, p2) {
Console.log (p1 + ' + p2 ');
}
Print.call (undefined, args);

The two are equivalent, but they are also equivalent, the output is also "Hello,world"!