How to implement input css read-only

In our web design, we often use the input element to implement the function of the input box. But in some cases, we don't want users to be able to modify the contents of these input boxes, such as displaying some read-only text information. At this time, we can use the readonly attribute readonly of the input element to achieve this requirement.

The function of the readonly attribute of the input element is to set the input box to a read-only state, that is, the user can view the content in the input box, but cannot modify or delete the content. This is very useful for scenarios where some information needs to be displayed to the user, such as order numbers, product descriptions, etc.

In CSS, we can use the following attributes to set the read-only status of the input element:

1. readonly

Use the readonly attribute to set the input element Set to read-only status. As shown below:

2. disabled

Use the disabled attribute to change the input The element is set to a disabled state and the user cannot click or take any action. However, the content in the input box cannot be copied in this case. As shown below:

When we want to change the read-only state of the input element, there are two common methods :

1. Use JavaScript to dynamically modify the attribute value

Use JavaScript script to dynamically modify the read-only attribute value of the input element to control its read-only status. As shown below:

document.getElementById("myInput").readOnly = true;
document.getElementById("myInput").readOnly = false;

2. Use CSS The selector selects a read-only input box

Select a read-only input element through a CSS selector, and then add styles to it to change its appearance or trigger other effects. As shown below:

input[readonly] {
color: #ccc;
cursor: not-allowed;
}

Summary

In When designing web pages, the read-only input box is a very practical feature. When using the input element, we can set it to a read-only state through the readonly attribute to achieve our design needs. In addition, using CSS selectors and JavaScript scripts are also common ways to change the state of read-only input boxes.

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