set : function (value) { show_txt.innerHTML = value; } });
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>双向数据绑定</title>
</head>
<body>
<div>
<input type="text">
<p></p>
</div>
<script>
var obj={};
var txt = document.getElementById("txt");
var show_txt = document.getElementById("show-txt");
Object.defineProperty(obj,‘txt‘,{
get : function () {
return obj;
},
set : function (value) {
show_txt.innerHTML = value;
}
});
txt.addEventListener(‘keyup‘,function (e) {
obj.txt = e.target.value;
});
</script>
</body>
</html>
js双向数据绑定
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