What is the difference between call and apply method in jQuery
This question already has an answer here:
They're not jQuery things, they're JavaScript things.
They do the same thing: They call the given function using a specific value for this within the function call. The only difference is how you specify the arguments to pass to the function. With call , you specify them as a series of discrete arguments (after the first one, which is what to use as this ). With apply , you specify them as an array (again after the first arg, which is what to use as this ).
So say we have:
function foo(a, b, c) {
console.log("this = " + this);
console.log("a = " + a);
console.log("b = " + b);
console.log("a = " + c);
}
These two calls do exactly the same thing:
foo.call("bar", 1, 2, 3);
// Note --------^--^--^--- a series of discrete args
foo.apply("bar", [1, 2, 3]);
// Note ---------^-------^-- args as an array
In both cases, we see:
this = bar a = 1 b = 2 c = 3链接地址: http://www.djcxy.com/p/18040.html