What's wrong with the vue code in the mini program not taking effect?

Recently, many small program developers have encountered a very difficult problem when developing using the vue framework - the vue code does not take effect in the small program. What exactly causes this problem to occur? Let’s analyze them one by one below.

1. The difference between mini program and vue

Mini program is an application form launched by Tencent, which is mainly used for a small application embedded in WeChat. Unlike traditional applications, mini programs do not occupy excessive memory and CPU resources when running, and can be quickly started and used without exiting WeChat. They are lightweight applications.

And vue is a front-end development framework, mainly used to build single-page applications (SPA) and dynamic websites. It uses some special syntax to quickly build applications and improve development efficiency.

Although on the surface there is no obvious connection between the mini program and vue, in fact, we can use the vue framework to build the user interface of the mini program and implement some functions of the mini program.

2. Why does the vue code not take effect in the mini program?

1. Mini programs do not support ES6

ES6 is the abbreviation of ECMAScript 6, also known as ECMAScript 2015, which is the latest standard version of JavaScript. The vue framework uses ES6 syntax extensively, but the applet does not support ES6. Therefore, when using the vue framework to develop small programs, it is recommended to use tools such as babel or typescript to convert ES6 code into ES5 code.

2. The vue framework needs to be compiled

Vue is a component-based front-end development framework, but this syntax does not support small programs. Therefore, when using the Vue framework to develop a small program, you need to compile it and convert the component syntax of Vue into the component syntax of the small program. It is recommended to use open source tools such as mpvue, uni-app, and wepy for compilation.

3. When using custom components in mini programs, you need to pay attention.

Custom components in mini programs are different from components in the vue framework. When using the vue framework to develop custom components, you need to pay attention to the following points:

• The properties and events of custom components and the components that come with the mini program are not necessarily exactly the same. You need to pass the props of the custom component and custom events to deliver data and events.
• When using v-for syntax to render a list, you need to use the wx:for directive instead of the v-for directive.
• Events triggered in child components need to be passed to the parent component through the $emit() method instead of calling it directly.
• The execution order of events on custom components needs to follow the event bubbling mechanism of the mini program, rather than the event capture mechanism of the vue framework.

3. Solution

The above mentioned reasons why the vue code does not take effect in the mini program, so how do we solve this problem? Here are several ways to solve the problem that the Vue code in the mini program does not take effect.

1. Use the mpvue framework

mpvue is a development framework based on vue.js and small programs, which can quickly develop small programs based on vue.js syntax. Using mpvue, you can choose ES6 or typescript to write code, and you can also use plug-ins such as vue-i18n to achieve internationalization.

2. Use the uni-app framework

uni-app is a multi-terminal application framework developed based on vue.js. In uni-app, you can use vue.js syntax to develop small programs , and supports multi-terminal packaging, which can package the code into applications for multiple platforms at one time.

3. Use the wepy framework

Wepy is a small program development framework similar to vue.js. You can use vue.js syntax to develop small programs and supports ES6 syntax. The wepy framework supports component development, which can encapsulate components and reduce code coupling.

To sum up, we can find that it is not too difficult to make vue code effective in small programs. You only need to master some mini program and Vue skills, and choose a suitable development framework, you can quickly develop efficient and stable mini program applications.

The above is the detailed content of What's wrong with the vue code in the mini program not taking effect?. For more information, please follow other related articles on the PHP Chinese website!