The This in JS

1. First analyze the function that this is located as which object is called by method, then the object is the object referenced by this.

2. Through call and apply you can redefine the execution environment of the function, which is the point of this, which is very

Commonly used. The first argument to call and apply is which object the function is called, and this points to the object. Other parameters are bound

The formal parameters of the function. The difference is that call accepts multiple parameters, and apply accepts only two arguments, and the second argument is the binding function's

The array that the formal parameter consists of.

3. The function parameter is not a call to an object, it is a global call, and its this point is a pointer to an object.

4.bind () Function: Take the method out of the object and call it, and you want this to point to the original object when you can

Nice to solve with the bind function.

The target function binds the bind function, this is bound to this in the binding function.

The This in JS