Vue devServer proxy is not helping, I still get CORS error

问题

I'm using @vue/cli 3.x and in my vue.config.js I have this:

devServer: {
    proxy: {
      "/api": {
        ws: true,
        changeOrigin: true,
        target: "http://localhost:8080"
      }
    }
  }

But I keep getting CORS error:

Access to XMLHttpRequest at 'http://localhost:8080/api' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Any idea?

回答1:

It looks like the problem was with the axios configurations.

I had this definition: axios.defaults.baseURL = "http://localhost:8080/api"; I changed it to axios.defaults.baseURL = "api";

and it works.

module.exports = {
    ...
    devServer: {
        proxy: {
          "^/api": {
          target: url,
          ws: true,
          changeOrigin: true
        }
     }
  },
}

来源：https://stackoverflow.com/questions/55607326/vue-devserver-proxy-is-not-helping-i-still-get-cors-error