How to Switch Between Vue Production and Development Environments and Use of Filters

Directory 1. Switching between production environment and development environment
Method 1: By configuring the. env file
Method 2
Step 2 Filter
3. Use of moment Time Library

1. Switch between production environment and development environment

Development environment: The development environment is to configure proxyTable under/config/index. js
Production environment: After packaging the project, the agent will fail, so it is necessary to reconfigure 1 under reproduction environment

Method 1: By configuring the. env file

Reference: https://cli.vuejs.org/zh/guide/mode-and-env.html

Method 2

Step 1: Switch through cross-env by creating js files for different environments

 config
    dev.js    
    prod.js
  
dev.js
module.exports = {
  BASE_URL: "https://test.365msmk.com"
};

prod.js

module.exports = {
  BASE_URL: "https://www.365msmk.com"
};

Step 2: Install cross-env and configure the parameters to pass in package. json

Installation instructions: npm install cross-env -D


package. Configuration in json

"scripts": {
    "serve": "cross-env BUILD_ENV=dev vue-cli-service serve",
    "build": "cross-env BUILD_ENV=prod vue-cli-service build"
  }

Step 3: Modify vue. config. js Add configuration for webpack

module.exports = {
 .....
  chainWebpack: config => {
    config.plugin("define").tap(args => {
      args[0]['process.env'].BUILD_ENV = JSON.stringify(process.env.BUILD_ENV);
      return args;
    });
  }
};

Switch environment in business code

// Read process.env Constant object BUILD_ENV
const envType = process.env.BUILD_ENV;

const urlObj = require(`../config/${envType}.js`);

// Create 1 A axios Instances 
const service = axios.create({
  baseURL: urlObj.BASE_URL + vipUrl
});

Step 2 Filter

1. Global Filters
Definition:

Vue.filter(' Filter name ',function(a,b,c) {
  //....
  
 return ...

})

Use:

{{ num |  Filter name (v1,v2) }}

2. Local filter

3. Summary: Filter usage scenario: Used to process background data into the data format finally displayed by the user

Examples: gender, payment status, logistics status, timestamp. . . . . .

3. Use of moment Time Library

moment official website: momentjs. cn/docs/

Installation instructions: npm i moment

Format: moment (timestamp). format ("YYYY year, MM month, DD day, HH time, mm minutes, SS seconds");

Format display: http://momentjs.cn/docs/#/displaying/

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