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mst2
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
<script>
var a={n:1};
var b=a;
a.x=a={n:2};
console.log(a.x);//un
console.log(b.x);//{n:2}
function fun(n,o){
console.log(o);
return{
fun:function(m){
return fun(m,n);
}
}
}
var fn=fun(0);//un
fn.fun(1);//0
fn.fun(2);//0
fn.fun(3);//0
fn=fun(0).fun(1).fun(2).fun(3);//un 0 1 2
fn=fun(0).fun(1);//un 0
fn.fun(2);//1
function Foo(){
getName=function(){
alert(1);
return this;
}
}
Foo.getName=function(){
alert(2);
}
Foo.prototype.getName=function(){
alert(3);
}
var getName=function(){
alert(4);
}
function getName(){
alert(5);
}
Foo.getName();//2
getName();//4
Foo().getName();//报错
getName();//4
new Foo.getName();//2
new Foo().getName();//3
new new Foo().getName();//3
</script>
</html>