How to make text boxes such as form input read-only and non-editable in HTML

Sometimes, we hope that the text box in the form is read-only so that the user cannot modify the information in it. For example, the content of the input text, the Chinese characters cannot be modified

Sometimes, we I hope that the text box in the form is read-only so that the user cannot modify the information in it. For example, if the content of 27f99ac88de2effeb81280b6bf4887ac is made, the word "China" Cannot be modified. To summarize, the implementation methods are as follows.

Method 1: onfocus=this.blur() Leave the focus when the mouse cannot be placed

<input type="text" name="input1" value="中国" onfocus=this.blur()>

Method 2: readonly

<input type="text" name="input1" value="中国" readonly> 
<input type="text" name="input1" value="中国" readonly="true">

Method 3 : disabled

<input type="text" name="input1" value="中国" disabled="true">

Complete example:

<input name="ly_qq" type="text" tabindex="2" onMouseOver="this.className=&#39;input_1&#39;" onMouseOut="this.className=&#39;input_2&#39;" value="123456789" disabled="true"　readOnly="true" />

disabled="true" In this case, the text will turn gray and cannot be edited.
readOnly="true" The text will not change color and is not editable

css shielded input: 4b2a1e8279b079c809aae37fa3e2a6d2

There are two methods. First: disabled="disabled" is defined so that the disabled input element is neither available nor clickable. Second: readonly="readonly" read-only fields cannot be modified. However, users can still use the tab key to switch to the field, and can also select or copy its text;

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