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What is the html read-only attribute?

藏色散人

Apr 01, 2021 am 11:30 AM

html

htmlThe read-only attribute refers to the readonly attribute, which stipulates that the input field is read-only; the readonly attribute prevents users from modifying the value until certain conditions are met; the setting syntax for this attribute is "".

What is the html read-only attribute?

The operating environment of this article: Windows7 system, HTML5&&CSS3 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">

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Attribute value, readonly sets the input field to read-only.

Example:

HTML form with two text fields and a submit button:

Code

<html>
<body>

<form action="/example/html/form_action.asp" method="get">
  
  <p>Name:<input type="text" name="email" /></p>

  <p>Country:<input type="text" name="country" 
  value="China" readonly="readonly" /></p>
  
  <input type="submit" value="Submit" />
</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>

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Running effect ：

What is the html read-only attribute?

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