W3School TIY Editor
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运行代码
<!DOCTYPE html> <html> <body> <h1>input minlength 属性</h1> <form action="/demo/action_page.php"> <label for="password">密码：</label> <input type="password" id="password" name="password" minlength="8"><br><br> <input type="submit" value="提交"> </form> </body> </html>