This time I will show you how to set the input to read-only effect through disabled and readonly, and set the input to read-only effect through disabled and readonly. What are the precautions?, the following is a practical case, Let’s take a look.
There are two ways to achieve the read-only effect of input: disabled and readonly.
Of course the two effects can only be read but not edited, but they are very different.
Disabled indicates that the input is invalid and its value will not be passed to any program, such as asp, php, etc.
Readonly only cannot be edited and does not affect the transfer of its value.
Disabled使用:<INPUT type="text" name="username" value="james" disabled> Readonly使用:<INPUT type="text" name="partNumber" value="1500" readonly>
I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!
Related reading:
How to use the href attribute and onclick event of a tag
How to use marquee to implement text in html Scroll left and right
How to add styles to images for radio and multi-select buttons
Button has several Click response methods
There are several ways to disable form controls in HTML
The above is the detailed content of How to set input to read-only through disabled and readonly. For more information, please follow other related articles on the PHP Chinese website!

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The function of HTML is to define the structure and content of a web page, and its purpose is to provide a standardized way to display information. 1) HTML organizes various parts of the web page through tags and attributes, such as titles and paragraphs. 2) It supports the separation of content and performance and improves maintenance efficiency. 3) HTML is extensible, allowing custom tags to enhance SEO.

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The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

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HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.


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