How to set vue0.1 seconds

Vue is a very popular JavaScript front-end framework. It is efficient and easy to use, making it attract the attention and love of more and more developers. In the process of developing projects using Vue, optimizing page loading speed and user experience is one of the important issues that developers need to solve. This article will introduce how to achieve a page loading speed of 0.1 seconds in Vue.

1. Vue.js execution performance

Vue.js execution performance is related to component complexity. Understanding this point means that whether it is Vue.js or other frameworks and libraries, there is a certain relationship between execution efficiency and complexity.

During the execution of Vue.js, whenever a data change is triggered, the corresponding DOM will be updated. Therefore, the execution efficiency of Vue.js is closely related to the number of DOM operations. Therefore, minimizing DOM operations can improve the execution performance of Vue.js.

2. Vue.js optimization method

1. Minimize DOM operation

In Vue.js, data is transferred and bound through the data attribute It is determined that Vue.js will re-render the DOM when the data changes. If in the process of updating the DOM, the more DOM nodes are updated, the more time it takes to update.

So, how to reduce DOM operations? This can be achieved using the v-if and v-show directives. The v-if directive will remove the DOM node, while the v-show directive just uses the CSS property display:none to hide the element and will not affect the node.

2. Reasonable use of calculated properties

Computed properties are calculated using the getter function. They will only be recalculated when dependencies change, which can reduce unnecessary calculations.

When using calculated properties, you should pay attention to the reasonable use of cache. If the amount of calculation is small or the calculation results change frequently, you can consider turning off the cache. If the amount of calculation is large or the changes are infrequent, you can enable caching.

3. Avoid unnecessary rendering

When the data changes, Vue.js will re-render the DOM, but in some cases, we do not need to re-render the entire component. Instead, only local content needs to be rendered. At this time, you can use the shouldComponentUpdate life cycle hook function.

shouldComponentUpdate determines whether the component needs to be re-rendered. If false is returned, the component will not be re-rendered.

4. Optimize list rendering

For list rendering, you can use the v-for directive, but if the amount of data is too large, it will affect the rendering speed and performance of the page. At this point, we can use the key attribute when using v-for to improve performance. The key attribute is used to specify the unique identifier of each node. When this identifier changes, Vue.js will re-render the DOM.

3. Precautions for Vue.js performance optimization

1. Avoid frequent use of watch

In Vue.js, watch is used to monitor data Change, when the data changes, the corresponding operation will be performed. However, if watch is used improperly, it may cause frequent update operations, thereby reducing performance. At this time, it is recommended to use computed instead of watch.

2. Avoid frequent use of methods

Method calls also take a certain amount of time. If methods are called frequently, it will affect the performance of the page. So, avoid using methods for frequent operations and consider using computed properties or directives.

3. Reasonable use of async/await

Vue.js Using async/await can avoid code nesting problems, but if used improperly, it may cause the page to freeze. Condition. Therefore, when using async/await, you need to make reasonable calls and handle exceptions.

4. Summary

Vue.js is a very excellent front-end framework that is efficient and easy to use. During use, you need to focus on optimizing page loading speed and user experience. This article introduces methods to achieve a page loading speed of 0.1 seconds, including minimizing DOM operations, rational use of calculated properties, avoiding unnecessary rendering, optimizing list rendering, etc.

At the same time, this article also puts forward precautions for performance optimization, avoid frequent use of watch, methods, and reasonable use of async/await to improve Vue.js performance. I believe that these optimization methods and precautions can help developers better use Vue.js.

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