<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
html {
margin: 0;
padding: 0;
}
body {
margin: 0;
padding: 0;
}
</style>
<script>
console.log('head before Mounted:' + document.querySelector('#box')?.innerHTML);
window.addEventListener('DOMContentLoaded', function (e) {
console.log('head dom content loaded: ' + document.querySelector('#box').innerHTML);
});
window.onload = function (e) {
console.log('head window onload: ' + document.querySelector('#box').innerHTML);
}
</script>
</head>
<body>
<script>
console.log('before Mounted:' + document.querySelector('#box')?.innerHTML);
</script>
<div id="box">box</div>[圖片上傳中...(image.png-1bc259-1676256319808-0)]
<script>
console.log('dom end: ' + document.querySelector('#box').innerHTML);
</script>
<script>
window.onload = function (e) {
console.log('window onload: ' + document.querySelector('#box').innerHTML);
}
</script>
<script>
window.addEventListener('DOMContentLoaded', function (e) {
console.log('dom content loaded: ' + document.querySelector('#box').innerHTML);
});
</script>
</body>
</html>
實踐出真知:JS執行順序
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