How to use Npm run build in vue to pass different parameters according to the environment

This time I will show you how to use Npm run build in vue to pass different parameters according to the environment, and use Npm run build in vue to pass different parameters according to the environment. What are the precautions?. Here are the actual cases. Let’s take a look.

During project development, the front-end is very troubled when configuring the back-end api domain name. It often appears:

Local development environment: api-dev.demo.com

Test environment: api-test.demo.com

Online production environment: api.demo.com,

This time it is packaged in the Vue.js project, and I will teach you how to do it:

Use npm run build -- xxx , according to the passed parameter xxx to determine different environments and give different domain name configurations.

1. Modification of /config/dev.env.js in the project:

New addition: HOST: '"dev"'

'use strict'
const merge = require('webpack-merge')
const prodEnv = require('./prod.env')
module.exports = merge(prodEnv, {
 NODE_ENV: '"development"',
 HOST: '"dev"'
})

2. Modify /config/prod.env.js in the project:

Get the parameters passed in:

'use strict'
let HOST = process.argv.splice(2)[0] || 'prod';
console.log(HOST);
module.exports = {
 NODE_ENV: '"production"',
 HOST: '"'+HOST+'"'
}

3. Project Modify the ajax package:

/**
** 设置API接口域名
**/
let apiUrl = '';
// 根据 process.env.HOST 的值判断当前是什么环境
// 命令：npm run build -- test ，process.env.HOST就设置为：'test'
let HOST = process.env.HOST;
HOST = HOST === 'prod' ? '' : '-' + HOST;
apiUrl = 'http://api'+HOST+'.demo.com';
axios.defaults.baseURL = apiUrl;

4. Finally type the command:

npm run build -- test

Note – it is two horizontal bars, followed by parameters, so that process.env.HOST will get the parameter 'test',

apiUrl = 'http://api-test.demo.com'

If the online prod is released and packaged, npm run build -- prod

apiUrl = 'http://api.demo.com'

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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The above is the detailed content of How to use Npm run build in vue to pass different parameters according to the environment. For more information, please follow other related articles on the PHP Chinese website!