In HTML5, the syntax for read-only and disabled is "" and ""; the readonly attribute is used to specify the input field Being read-only, the disabled attribute specifies that the element should be disabled.
The operating environment of this tutorial: Windows 10 system, HTML5 version, Dell G3 computer.
The readonly attribute specifies that the input field is read-only.
Read-only fields cannot be modified. However, users can still tab to the field and select or copy its text.
The readonly attribute prevents users from modifying the value until certain conditions are met (such as a checkbox being selected). Then, you need to use JavaScript to eliminate the readonly value and switch the input field to an editable state.
The readonly attribute can be used with or .
Syntax
<input readonly="value">
The disabled attribute specifies that the input element should be disabled.
A disabled input element is neither available nor clickable. The disabled attribute can be set until some other condition is met (such as a checkbox being selected, etc.). Then, you need to use JavaScript to remove the disabled value and switch the value of the input element to available.
Note: The disabled attribute cannot be used with .
Grammar
<input disabled="value">
The example is as follows:
<html>
<body>
<form action="/example/html/form_action.asp" method="get">
<p>正常的input：<input type="text" name="fname" /></p>
<p>禁用input： <input type="text" name="lname" disabled="disabled" /></p>
<p>只读input：<input type="text" name="country"
value="China" readonly="readonly" /></p>
</form>
<p>请在提交按钮上单击，输入会发送到服务器上名为 "form_action.asp" 的页面。</p>
</body>
</html>Output result:
Recommended tutorial: "html Video tutorial》
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