JS self-invocation anonymous function to implement _JAVASCRIPT skills

JS often defines a function as a temporary namespace in which variables defined within the namespace do not contaminate the global namespace (preventing local and global variables from being conflicted).

Copy Code code as follows:

function MyModule () {
Module code
}
MyModule ();

can be abbreviated as:

Copy Code code as follows:

(function () {//mymodule () function overrides to anonymous functional expression
Module code
} () <span style= "color: #ff0000;" >) </span>; End Function definition and call it now

Or:

Copy Code code as follows:

(function () {

}<span style= "color: #ff0000;" >) </span> ();

This definition of anonymous functions and immediate invocation (from the call anonymous function) has been very common, beginning to be a bit confusing, the source of jquery is written in this way:

Copy Code code as follows:

(Function (window, undefined) {

All the code for jquery
}) (window);