Anonymous funct...LOGIN

Anonymous functions in JavaScript

Anonymous function:

is a function without a name.

  • Anonymous functions cannot be defined or called individually.

  • Anonymous functions are generally used as data to assign values ​​to other variables. You can assign values ​​to ordinary variables, array elements, and object properties.

<!DOCTYPE HTML>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        <title>php.cn</title>
        <script>
            var a=88 ;//将数值赋值给变量a,此时变量a就是“数值型”变量
            var a="asd"; //将字符串赋值给a,此时变量a就是“字符型”变量
            var a=true;  //将布尔值赋值给变量a,此时变量a就是“布尔型”变量
            var a=[10,20];//将数组赋值给变量a,此时变量a就是“数组型”变量
            var a=function(name,age){//将函数值赋值给变量a,此时变量a就是“函数型”变量
                window.alert("我叫"+name+"今年"+age+"岁");
            }
            //调用函数
            a("小明",20);
            var b=a;//将变量a的地址,拷贝一份传给变量b
            b("小白",22);
        </script>
    </head>
    <body>
    </body>
</html>


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<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>php.cn</title> <script> var a=88 ;//将数值赋值给变量a,此时变量a就是“数值型”变量 var a="asd"; //将字符串赋值给a,此时变量a就是“字符型”变量 var a=true; //将布尔值赋值给变量a,此时变量a就是“布尔型”变量 var a=[10,20];//将数组赋值给变量a,此时变量a就是“数组型”变量 var a=function(name,age){//将函数值赋值给变量a,此时变量a就是“函数型”变量 window.alert("我叫"+name+"今年"+age+"岁"); } //调用函数 a("小明",20); var b=a;//将变量a的地址,拷贝一份传给变量b b("小白",22); </script> </head> <body> </body> </html>
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