监听INPUT值的即时变化

<!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>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <meta name="auther" content="fq" />

    <title>监听输入框值的即时变化 onpropertychange oninput</title>

    <script type="text/javascript">

    function immediately() {

        var element = document.getElementById("mytext");

        if ("\v" == "v") {

            element.onpropertychange = webChange;

        } else {

            element.addEventListener("input", webChange, false);

        }

        function webChange() {

            if (element.value) {

                document.getElementById("test").innerHTML = element.value

            };

        }

    }

    function addValue() {

        document.getElementById("mytext").value = 'dfdsafdsfsfsdfsdfdsf';

        document.getElementById("mytext2").value = 'dfdsafdsfsfsdfsdfdsf';

    }

    </script>

</head>

<body>

    <input type="button" id="txts" value="点击加载值!" onclick="addValue();" /> 直接写在页面中的示例：

    <input type="text" id="mytext2" name="textfield" oninput="document.getElementById('webtest').innerHTML=this.value;" onpropertychange="document.getElementById('webtest').innerHTML=this.value;" />

    <div>您输入的值为：<span id="webtest">还未输入</span></div>

    <br />

    <br />

    <br />

    <br />

    <br />

    <input type="text" id="mytext3" name="textfield" oninput="document.getElementById('webtest').innerHTML=this.value;" onpropertychange="document.getElementById('webtest').innerHTML=this.value;" />

    <div>您输入的值为：<span id="webtest">还未输入</span></div>

    <br />

    <br />

    <br />

    <br />

    <br /> 写在JS中的示例：

    <input type="text" name="textfield" id="mytext" />

    <div>您输入的值为：<span id="test">还未输入</span></div>

    <script type="text/javascript">

    immediately();

    </script>

    <script type="text/javascript">

  /*  function fn() {

        console.log(this.a);

    }

    var obj = {

        a: 2,

        fn: fn

    };

    var bar = obj.fn;

    var a = "全局";

    bar();

    <!---->

    var obj = {

        a: 2

    };

    fn.call(obj);

    var obj = {

        a: 3

    }

    fn.apply(obj);

    var a = 10;

    fn.call();

    function Fun(a) {

        this.a = a;

    }

    var bar = new Fun(2);

    console.log(bar.a);

    function fn1() {

        var b = 2;

        this.fn2(); //以为this引用的是fn1的词法作用域

    }

    function fn2() {

        console.log(this.b);

    }

    fn1(); //ReferenceError*/

    </script>

  <!--   <script type="text/javascript" src="socket.io.js"></script> -->

</body>

</html>
巴特西

监听INPUT值的即时变化

最新文章

热门文章
