以前解決跨域問題都是后臺設(shè)置好了 Access-Control-Allow-Origin 之后，我就可以在直接調(diào)用所有接口都不跨域了

現(xiàn)在用了vue-cli些vue項(xiàng)目，也知道是在config的index.js文件里面更改，
但是為什么我這樣寫的

    dev: {
        env: require('./dev.env'),
        port: 8080,
        autoOpenBrowser: true,
        assetsSubDirectory: 'static',
        assetsPublicPath: '/',
        proxyTable: {
            '/index':{
                target:'http://線上接口',
                changeOrigin:true,
                pathRewrite:{
                    '^/index':''
                }
            },
            '/ms':{
                target: 'https://www.easy-mock.com/mock/592501a391470c0ac1fab128',
                changeOrigin: true
            }
        },
        // CSS Sourcemaps off by default because relative paths are "buggy"
        // with this option, according to the CSS-Loader README
        // (https://github.com/webpack/css-loader#sourcemaps)
        // In our experience, they generally work as expected,
        // just be aware of this issue when enabling this option.
        cssSourceMap: false
    }

this.$axios({
    method: 'post',
    url:'/index.php?mod=investment&code=check_invest_user',
    data:params
}).then((res)=>{
    console.log(res.data);
    if(res.data.errCode==0){

    }else if(res.data.errCode==1){
        this.$alert(res.data.retData.msg);
    }else if(res.data.errCode==2){
        this.$router.push('/login');
    }
});

調(diào)用接口的時候?yàn)g覽器請求的就變成了本地的
http://localhost:8080/index.php?mod=investment&code=check_invest_user

補(bǔ)充說明：
我重啟下npm run dev 接口可以調(diào)成功了
但是返回的數(shù)據(jù)是空的

之前后臺有設(shè)置過Access-Control-Allow-Origin
如果我把線上接口直接寫在 axios 里面url里 就不會有問題。。。數(shù)據(jù)都能拿到