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This article mainly introduces javascript function how to use var definition of related knowledge, detailed and easy to understand, simple and fast operation, has a certain reference value, I believe we read this javascript function how to use var definition article will have some gains, let's take a look at it.

JavaScript functions can be defined with var. In javascript, a function can be defined either declaratively or by an expression with the syntax "var funName = new Function(argument list," function structure statement ");".

Operating environment of this tutorial: Windows 7 system, Javascript version 1.8.5, Dell G3 computer.

In javascript, functions can be defined with the function keyword declaration.

function funName([parameter list]) { statements}

You can also use the Function() constructor to define an expression:

var funName = new Function(parameter list,body);

The argument types of Function() are all strings, and the body represents the function structure statement of the function being created, separated by semicolons.

Examples of use:

You can omit all arguments and pass only a string representing the function body.

var f = new Function ("a", "b", "return a+b"); //clone function structure by constructor

In the above code, f is the name of the function being created. The same is true for defining functions, and using the function keyword you can design functions of the same structure.

function f(a, b) { //Define function structure using function statement return a + b;} About "javascript function how to use var definition" The content of this article is introduced here, thank you for reading! I believe that everyone has a certain understanding of the knowledge of "how to use var definition of javascript function". If you still want to learn more knowledge, please pay attention to the industry information channel.

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