How to cancel css style

CSS (Cascading Style Sheets) is an essential skill in web design. Through CSS styles, we can make web pages more beautiful, practical and easy to read. However, sometimes you may encounter a situation where you need to cancel the CSS style on an element. This article will discuss how to correctly cancel CSS styles.

When using CSS styles, we usually use a stylesheet file reference, for example:

<link>

Then apply the style to the HTML element:

<div>
  <h1 id="我的网站">我的网站</h1>
  <p>欢迎来到我的网站！</p>
</div>

In the above code example , we added CSS style classes to a container element <div> and two inner elements <code><h1></h1> and <p></p>. CSS style classes can be applied to one or more elements, which makes the design of style sheets more efficient.

However, sometimes you may need to cancel the CSS style on an element. One solution is to replace the original style by overriding the attribute value of the style class. For example, if you didn't want the <h1></h1> element to use the font size of the style class .title, you could write:

h1.title {
  font-size: 16px;
}

h1 {
  font-size: inherit;
}

In the example above , we first defined the font size under the .title class style as 16 pixels. However, by overriding the style of the h1 element in the code below, we can set the font size to the default font size of the parent element (the container element), where inherit is the CSS property value A keyword that allows an element to inherit the styles of its parent element.

However, using CSS inherited properties cannot guarantee consistency across all browsers, operating systems, and devices, especially on mobile device browsers.

Another solution is to use the all attribute and set it to initial. The all attribute will override all CSS styles on the element, while the initial value will set all styles to their default values. This method is the most straightforward, but it may have some side effects, such as it not clearing the element's inline styles.

h1 {
  all: initial;
}

If you want to suppress CSS styles on multiple elements, you can move them into a separate CSS class and add or remove the class as needed:

.cancel-all {
  all: initial;
}

Then in Add this class to the element that needs to be canceled:

<h1 id="我的网站">我的网站</h1>

Since there are many ways to cancel CSS styles, we need to carefully choose which method should be used in a specific situation. In practice, we should adopt some best practices to ensure that our code meets the best performance and readability standards.

To summarize, canceling a CSS style can either be canceled by overriding the property value of the style class, or by resetting all CSS styles to their default values. By adding the elements that need to be unstyled into a separate CSS class, we can easily add or remove the class when needed. Finally, we should be careful about how we choose to unstyle CSS and adopt some best practices to ensure the performance and readability of our code.