How to disable selection in css

CSS is an important part of front-end development. Its design can make the website more beautiful and easier to use. In CSS, there are many interesting features, one of which is that the CSS specification can prevent the user from selecting the text of a specific element.

How is this feature implemented? In CSS, we can use the "user-select" attribute to define whether the user is allowed to select the text of an element. This attribute has three values ​​that can be set:

1. auto (default value): The user can select the text of the element.
2. none: The user cannot select the element's text.
3. text: Users can only select text within the element.

Let’s take a look at how to implement it:

When we want to prevent users from selecting the text of the entire page, we can write CSS like this:

html {
  -webkit-user-select: none; /* webkit浏览器 */
  -moz-user-select: none; /* Firefox */
  -ms-user-select: none; /* IE10+ */
  user-select: none; /* 标准语法 */
}

In the above code The "user-select" attribute is used to disable selection of the entire page's text. This line of code will make text selection unavailable for all elements on the entire HTML page, and will work across different browsers.

When we need to prohibit text selection of a specific element, we can write CSS like this:

p.no-select {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

In the above code, we use the "no-select" class to define unselectable paragraphs. When we need to prohibit the selection of text in a specific element, we only need to add the class name in the HTML tag:

<p class="no-select">这是一段不能被选择的文本。</p>

In addition to prohibiting users from selecting the text of a certain element, we can also use "user -select" attribute to let the user select only the text within it. This prevents users from selecting text within other elements. Here is an example:

div.selected {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

In the above code, we use the "selected" class to define a div in which only the text within it can be selected. When we need to implement this restriction, we can add the class name in the HTML tag.

To summarize, the CSS "user-select" attribute can conveniently disable selection, limit selection and control the selection content. We can use it to improve the usability and aesthetics of the page. Hope this article is helpful to everyone.

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