How to solve the problem that the uniapp global style component does not take effect

Recently, when using uniapp for development, I encountered a problem: the global style component cannot take effect. After some searching and trying, I finally solved this problem. So, next I will introduce the cause and solution of this problem in detail.

Problem description:

When developing with uniapp, sometimes we need to define global styles. At this time, we can define global style components in the App.vue file. However, in some cases, the global style component does not take effect. For example, in a certain page or component, we reference the global style, but it does not take effect. This is a very confusing question.

Cause of the problem:

When using uniapp for development, there may be multiple pages or components, and the styles of these pages or components may override the global styles. This causes global styles to fail to take effect. This is mainly because when it comes to style priority, local styles have higher priority than global styles. When writing CSS style sheets, in order to improve maintainability, we usually use classes and their combinations to define styles, which makes the naming of styles very complicated.

Solution:

So, how to solve this problem? Next, I will introduce two possible methods.

Method 1: Use the !important tag to change the priority of the style. Add the !important tag to the global style, so that the priority of the global style can be increased, so that the global style can take effect. For example:

.global-class {
  color: red !important;
}

Method 2: Use custom components and set default styles. In the custom component, define the default style, and then reference the component to the page or component that needs the global style to take effect. For example:

1. Create a component named MyText in the components directory:

<template>
  <span><slot></slot></span>
</template>

<style>
.default-text {
  color: #333;
  font-size: 16px;
}
</style>

2. Reference the component in the page or component that needs the global style to take effect, and change the class name is the name of the global style. For example:

<template>
  <div>
    <my-text>这是一段文本</my-text>
  </div>
</template>

<script>
import MyText from &#39;@/components/MyText.vue&#39;;
export default {
  components: {
    MyText
  }
}
</script>

<style>
.global-class {
  color: red;
  font-size: 18px;
}
</style>

The above are two methods to solve the problem that the uniapp global style component does not take effect. Of course, there are many other ways to solve this problem, but the above two methods are more practical.

Summary:

In actual development, we often encounter problems with confusing styles and difficulty in maintaining. Therefore, when developing, we should follow the style naming convention, use classes and their combinations to define styles, and try to use tools such as CSS preprocessors to improve the maintainability of styles. At the same time, you should also understand the issue of style priority and master the methods to solve style priority, so that you can better deal with development problems.

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