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why is simple javascript code not running?

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渐次进展 2020-12-07 05:19

why is simple javascript code not running ?
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3条回答
  • 时光取名叫无心
    2020-12-07 06:05

    the order

    <a id="myBtn" href="#">click me </a>
<script type="text/javascript" charset="utf-8">

var btn = document.getElementById("myBtn");
btn.onclick = function(){
alert("Clicked");
};

</script>
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  • 轮回少年
    2020-12-07 06:19

    Have a look at this. The javascript block needs to be after the html element:

    Your code works but is better to use like this:

    var btn =
document.getElementById('myBtn');
btn.addEventListener('click',function
(e) {   alert('my click works after the html element has been created');
},true);
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  • Happy的楠姐
    2020-12-07 06:20

    Assign your onclick handler after document is loaded.

    <script type="text/javascript" charset="utf-8">

function assignHandler() {
    var btn = document.getElementById("myBtn");
    btn.onclick = function() {
        alert("Clicked");
    };
}

</script>

<body onload="assignHandler()">
<a id="myBtn" href="#">click me </a>
</body>
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