Solve the problem of page flickering caused by Vue asynchronous data update

How to solve the problem of page rendering flickering caused by asynchronous data update in Vue development

In Vue development, we often encounter the problem of page rendering flickering caused by asynchronous data update. This problem generally occurs in scenarios where data needs to be obtained from the backend and rendered on the page. Due to network delays or complex data operations, the elements on the page will be displayed as empty or in the default state before the data is updated, and then suddenly updated to The new data causes an obvious flickering effect on the page, giving users a bad experience.

The following will introduce some methods to solve the problem of page rendering flickering caused by asynchronous data update.

1. Use the v-if directive

You can use the v-if directive to decide whether to render an element based on whether the data exists. In this way, when the data is updated, the element will decide whether to display it based on whether the new data exists, thus avoiding the rendering flicker problem.

For example:

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<div v-if="data">{{data}}</div>

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export default {
data(){

return {
  data: null
}

},
methods:{

getData(){
  // 异步获取数据
  setTimeout(()=>{
    this.data = 'Hello World';
  },1000)
}

},
mounted(){

this.getData();

}
}
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In this way, the page will not display elements before the data is updated, and will only display the elements after the data update is completed. Avoids page rendering flickering issues.

2. Using Vue's transition effects

Vue provides the function of transition effects, which can smoothly handle the flickering problem during page updates by adding transition effects.

For example:

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  <div v-if="data">{{data}}</div>

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In the above code, by using Vue's transition effect, when the data is updated, the elements on the page will have a gradient transition effect, thus making the page update smoother and reducing the feeling of flickering.

3. Using the v-cloak directive

The v-cloak directive is a built-in directive of Vue that retains the original state of the element until the Vue instance completes compilation. By using the v-cloak directive on the element that needs to be rendered, you can ensure that the element will not be displayed until the data is updated, avoiding page flickering problems.

For example:

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<div>{{data}}</div>

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In the above code, the v-cloak directive is used to ensure that the div element will not be displayed until the Vue instance completes compilation, thus avoiding the page rendering flicker problem.

Summary

The above are some methods to solve the problem of page rendering flickering caused by asynchronous data update in Vue development, including using the v-if instruction, using Vue's transition effect and using the v-cloak instruction. Based on specific scenarios and needs, you can choose a method that suits you to solve the problem of page rendering flickering and improve user experience. Hope the above content is helpful to you!

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