Several methods for writing anonymous functions in JavaScript _javascript tips

Error mode: syntax error warning

Copy Code code as follows:

function () {
Insert code here
}();

Mode one: function literal (functions Literal)

Declare the function object first, and then execute.

Copy Code code as follows:

(function () {
Insert code here
})();

Mode two: Precedence expression (Prior Expression)

Because JavaScript executes an expression from inside to outside, parentheses are used to enforce a declared function.

Copy Code code as follows:

(function () {
Insert code here
}());

Mode III: void operator (void Operator)

Use the Void operator to perform a separate operand.

Copy Code code as follows:

void function () {
Insert code here
}();

Technically speaking, these three code patterns are equivalent. But in practical applications, such as YUI, JQuery and other frameworks, pattern one is more widely used.