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<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>输入用户名案例</title>
</head><body><script>// 1.用户输入// prompt('请输入姓名')// 2.内部处理保存数据let uname = prompt('请输入姓名')// 3.打印输出document.writeln(uname)</script>
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