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onhashchange

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        if ("onhashchange" in window) {
            alert("该浏览器支持 hashchange 事件!");
        }
        function locationHashChanged() {
            if (location.hash === "#somecoolfeature") {
                // somecoolfeature();
                alert(1)
            }
        }
        window.onhashchange = locationHashChanged;
    </script>
</head>
<body>
    <a href="#somecoolfeature">122121</a>
    <!-- <div id="box"></div> -->
</body>
</html>