Several Methods for writing anonymous functions in JavaScript

Error Mode: syntax error warning
Copy codeThe Code is as follows:
Function (){
// Insert code here
}();

Mode 1: Function Literal)

Declare the function object and then execute it.
Copy codeThe Code is as follows:
(Function (){
// Insert code here
})();

Mode 2: Prior Expression)

Since JavaScript executes expressions in the order from inside to outside, brackets are used to force the execution of declared functions.
Copy codeThe Code is as follows:
(Function (){
// Insert code here
}());

Mode 3: Void Operator)

Use the Void operator to execute a separate operand.
Copy codeThe Code is as follows:
Void function (){
// Insert code here
}();

Technically speaking, these three code modes are equivalent. However, in practical applications, such as YUI and jQuery frameworks, Pattern 1 is more widely used.