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JS技巧

2016-06-21 10:11 351 查看
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">

var i=10;
while(i--)
{
alert(i);
}

var a=true;
var b = false;

var obj = { name: 'xiaoxiao',  m1: function () { alert('m1'); } }
obj.m1;
alert(JSON.stringify(obj));
var i = 1;
i = +i;alert(i);
var test =''|| false; alert(test);
alert(test);

var array = [1,2,3];
len = array.length;
i = i ? i < 0 ? Math.max(0, len + i) : i : 0;
alert(i);

var results = null;

var ret = results || [];

alert(ret.length);

for (; i < 10; ) {
alert(i);
i++;
}

var ja = function () { alert('this is ja'); }

ja.c = function () { alert('acccccc'); };
ja.pg = function () { alert('this is pg'); abc = 'this is abc00001'; return this.pg; };
//        ja.pg() = function () { alert('this is pg()'); }
//ja.pg().ac = function () { alert("this is ac"); return '01'; }
ja.pg().title = 'this is title';
alert(ja.pg().title);
alert(ja.pg.title+'static');
//        alert(ja.pg['a01']);
//        alert(ja.pg()['a01']);
//        ja.pg().c = function () { alert('this is c1'); }
//        ja.pg().c();
//        ja.pg().c = "ccc1";
//        ja.pg()['ac'] = 'this is ac';
//        alert(ja.pg()['ac']);
//       alert( ja.pg().c);
</script>
</head>
<body>

</body>
</html>
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