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<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<body>
<div class="w">
<div class="controls">
<img src="images/tip.png" alt=""><br>
<textarea placeholder="说点什么吧..." id="area" cols="30" rows="10" maxlength="200"></textarea>
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<span>200</span>
<button id="send">发布</button>
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<div class="contentList">
<ul>
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useCount.innerHTML = area.value.length
})
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