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| <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <div class="parent"> <span>你好吗</span> </div> </body>
</html> <script> window.onload = function () { var span = document.createElement('span'); span.innerHTML = "你好世界"
var span1 = document.createElement('span'); span1.innerText = 'Hello,world'
var parent = document.querySelector('.parent'); parent.insertBefore(span, parent.childNodes[0]); parent.appendChild(span1) } </script>
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