js anonymous call implementation code_javascript skills

Okay, let's see how the anonymous function is called.
1. Function call to get return value after execution
Js code

Copy code The code is as follows:

//Method 1, call the function and get the return value. The coercion operator causes the function call to execute
(function(x,y){
alert(x y);
return x y;
}(3,4));

Js code
//Method 2, call the function and get the return value. Force the function to be executed directly and then return a reference. The reference is then called and executed

Copy the code The code is as follows:

(function(x,y){
alert(x y);
return x y;
})(3,4);

2. Ignore the return value after execution
Js code

Copy code The code is as follows:

//Method 3, call the function and ignore the return value
void function(x) {
x = x-1;
alert(x);
}(9);

//Method three, call the function and ignore the return value

Copy the code The code is as follows:

void function(x) {
x = x-1;
alert(x);
}(9);

Well, finally look at the error Calling method
Js code
//Wrong calling method

Copy code The code is as follows:

function(x,y){
alert(x y);
return x y;
}(3,4);