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Vanessa219 avatar Vanessa219 commented on September 7, 2024

DOMContentLoaded 已经结束才进行监听就会无效。可以换成 alert 就可以看到是否执行了。

<div>
<script>
alert(1)
    document.addEventListener('DOMContentLoaded', function() {
        var jsSupported = document.getElementById('js-supported');
        jsSupported.innerHTML = 'JavaScript is supported!';
        jsSupported.style.color = 'green';
    });
</script>
</head>
<body>
    <div id="js-supported" style="font-size: 24px; text-align: center; margin-top: 50px;">
        Checking JavaScript support...
    </div>
    <noscript>
        <div style="font-size: 24px; text-align: center; margin-top: 50px; color: red;">
            JavaScript is not supported on your browser.
        </div>
    </noscript>
</body>
</div>

from siyuan.

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