manifest.json里找到H5，添加下面代码

请求封装里直接 url = ‘/test’ 就可以

"devServer" : {
    "https" : false,
    "port" : 8080,
    "proxy" : {
        "/test" : {
            "target" : "http://192.168.5.20:8080",
            "changeOrigin" : true,
            "secure" : false,
            "pathRewrite" : {
                "^/test" : ""
            }
        },
        "/online" : {
            "target" : "https://app.com",
            "changeOrigin" : true,
            "secure" : false,
            "pathRewrite" : {
                "^/online" : ""
            }
        }
    }
},
"router" : {
    "mode" : "history"
}