Home  >  Article  >  Web Front-end  >  How to use the Function function for getting started with js

How to use the Function function for getting started with js

高洛峰
高洛峰Original
2017-01-04 16:04:061805browse

In JavaScript, functions can be nested.

For example:

function(){
 
  funcrion square(x){ return x*x; }
 
  return square(10); 
 
}

In JavaScript, a function is bound to an object. The function called by the object is called a method. It is easy to follow. C# is confusing.

1. Function attributes

In the function body, you can get the number of actual parameters passed into the function through arguments.length.

function fun1 (x,y){
 
  document.write(arguments.length());  //输出2,传入的参数是两个
}
fun1();

2. Bind the function to the object

var fun1 = function () {
 alert(this.name);
}
var o = { name:"张三",fn : fun1 };
o.fn();  //输出 张三
var o = { name: "张三", fn: function () { alert(this.name) } }
o.fn();  //输出张三

The above is this article All the content, I hope it will be helpful to everyone, thank you for your support to the PHP Chinese website!

For more articles related to how to use the Function function for getting started with js, please pay attention to the PHP Chinese website!


Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn