What functions are impossible to achieve with css style sheets?

CSS style sheet is an indispensable part of web development. It can be used to beautify web pages, change font styles, adjust layout, add dynamic effects, etc. However, CSS also has some limitations, and some functions cannot be achieved by it. This article will explore some functions that cannot be achieved with CSS and how to solve these problems.

1. Completely control the style inside the input box

In web development, we often need to use input boxes, such as login forms, search boxes, etc. However, CSS does not fully control the style inside the input box. For example, we cannot modify the "Clear" button of the input box, modify the placeholder text style of the input box, add an icon to the input box, etc. These limitations bring great challenges to our design and development.

Solution:

In order to solve this problem, we can use JavaScript or jQuery to dynamically modify the style inside the input box. For example, you can use JavaScript to select the parent node of an input box and then add or modify the style of the internal elements. Alternatively, we can also use third-party components, such as Bootstrap, Semantic UI, etc., which have some built-in input box components to better solve this problem.

2. Achieve absolute centering

In web development, we often need to achieve absolute centering of an element, such as a modal box, a drop-down menu, a button, etc. However, achieving absolute centering with CSS is very difficult because of factors such as the browser window size and the size of the element.

Solution:

In order to solve this problem, we can use JavaScript or jQuery to calculate the size of the element, and then dynamically adjust the position of the element. Or we can also use flex layout and set attributes such as display:flex and align-items:center to the parent container to achieve absolute centering of elements.

3. Achieve vertical centering of multi-line text

In web development, we often need to vertically center multi-line text, such as a title, a paragraph, a menu, etc. However, it is also very difficult to use CSS to vertically center multi-line text because factors such as the number of lines, font size, line spacing, etc. must be taken into consideration.

Solution:

In order to solve this problem, we can use CSS properties such as display:flex and align-items:center to center multi-line text. Alternatively, we can also use JavaScript or jQuery to dynamically obtain the height and line spacing of the element, then calculate the position of the text and adjust its style.

4. Implement effects such as "display when hovering over other elements"

In web development, we often need to implement some special effects, such as popping up when the mouse is hovering over other elements. layers, dynamically display information when the mouse moves over an element, display fixed buttons in some locations, etc. However, it is also very difficult to achieve these effects in CSS.

Solution:

In order to solve this problem, we can use JavaScript or jQuery to control the display and hiding of elements. For example, we can dynamically create or delete elements and add or remove styles through DOM operations. Alternatively, we can also use third-party components, such as Popper.js, Tooltipster, etc., to achieve these special effects more conveniently.

Summary:

Although CSS style sheets can make our web pages more beautiful and dynamic, it also has some limitations and some functions cannot be realized. Through the introduction and solutions in this article, we can better understand the limitations of CSS and find better solutions to meet our needs.

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