How vue.js solves cross-domain problems

Vue.js method to solve cross-domain problems: 1. Enter the vue project root directory; 2. Find the vue.config.js file and open it with an editor; 3. Set cross-domain in proxy .

The operating environment of this article: windows10 system, vue 2.5.2, thinkpad t480 computer.

To implement cross-domain in vue development, you need to first enter the vue project root directory, find the vue.config.js file, and then set the cross-domain in the proxy:

Tips: If you cannot find it Go to the vue.config.js file and create one yourself.

devServer: {
    proxy: {  //配置跨域
      '/api': {
        target: 'http://121.121.67.254:8185/',  //这里后台的地址模拟的;应该填写你们真实的后台接口
        changOrigin: true,  //允许跨域
        pathRewrite: {
          /* 重写路径，当我们在浏览器中看到请求的地址为：http://localhost:8080/api/core/getData/userInfo 时
            实际上访问的地址是：http://121.121.67.254:8185/core/getData/userInfo,因为重写了 /api
           */
          '^/api': '' 
        }
      },
    }
  },

The principle of using proxy in vue for cross-domain is: send the domain name to the local server (start the service of the vue project, loclahost:8080), and then the local server requests the real server.

The following are the steps I took to implement cross-domain development in the vue project:

1. Set the address to be accessed in the proxy, and rewrite the /api empty string, because we The actual requested address does not include /api. This rewriting is very important!!!

#2. When creating an axios instance, set the baseURL to /api. At this time Our cross-domain has been completed.

3. If the real address of the request is: http://121.121.67.254:8185/core/getdata/userInfo, but we will see it on the browser Like this: http://localhost:8080/api/core/getData/userInfo, there is an extra /api, but it does not affect our request for data.

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