HTML DOM Input Number readOnly 属性
HTML DOM input number readOnly 属性会在 HTML 文档中返回并修改数字输入框是只读还是可写。
语法
以下是语法 −
返回 readOnly
object.readOnly
修改 readOnly
object.readOnly = true | false
示例
我们来看看数字输入的 readOnly 属性示例 −
<!DOCTYPE html> <html> <head> <style> html{ height:100%; } body{ text-align:center; color:#fff; background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat; height:100%; } p{ font-weight:700; font-size:1.1rem; } input{ display:block; width:35%; border:2px solid #fff; background-color:transparent; color:#fff; font-weight:bold; padding:8px; margin:1rem auto; outline:none; } .btn{ background:#0197F6; border:none; height:2rem; border-radius:2px; width:35%; margin:2rem auto; display:block; color:#fff; outline:none; cursor:pointer; } </style> </head> <body> <h1>DOM Input number readOnly property Demo</h1> <p>Hi, Select your day of birth?</p> <input type="number" class="numberInput"> <button onclick="rFunction()" class="btn">Read Only</button> <button onclick="rWFunction()" class="btn">Read & Write</button> <script> function rFunction() { var monthInput = document.querySelector(".numberInput"); monthInput.readOnly =true; } function rWFunction(){ var monthInput = document.querySelector(".numberInput"); monthInput.readOnly =false; } </script> </body> </html>
输出
将产生如下输出 −
点击“只读”然后点击“读写”按钮来了解 readOnly 属性如何工作。
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