Several ways to write anonymous functions in JavaScript_javascript skills

Error mode: Syntax error warning

Copy code The code is as follows:

function(){
// insert code here
}();

Mode 1: Function Literal (Function Literal)

Declare the function object first and then execute it.

Copy code The code is as follows:

(function(){
// insert code here
})();

Mode 2: Priority Expression (Prior Expression)

Since JavaScript executes expressions in order from the inside to the outside, brackets are used to force execution of a declared function.

Copy code The code is as follows:

(function(){
// insert code here
}());

Mode 3: Void Operator (Void Operator)

Use Void operator to execute a single operand.

Copy code The code is as follows:

void function(){
// insert code here
}();

Technically, these three code patterns are equivalent. But in actual applications, such as YUI, jQuery and other frameworks, mode 1 is more widely used.