节点js上的模态框

Question

我有文件上传API，该API会在文件上传时发送SUCCESS消息，而在未选择文件时会发送FAILURE消息。

app.js

name

代替res.send（），我想显示一些在我的html代码上定义的模式框。在我发帖请求时，需要有关如何合并或显示此模式框的帮助。

index.html

    const express = require("express");
    const app = express();
    const http = require("http").Server(app).listen(3000);
    const upload = require("express-fileupload");
    const request = require("request");

    app.use(express.urlencoded());
    app.use(express.json());
    app.use(upload({
    useTempFiles: true,
    tempFileDir: '/tmp/'
    }));

    console.log("Server Started");

    // To load both HTML and CSS files on the root call
    app.use(express.static(__dirname + "/public"));

    app.get("/", function (req, res) {
    res.sendFile(__dirname + "/index.html");
    }
    )

    app.post("/", function (req, res) {
    if (req.files.filename.name) {
        res.send("uploaded");
    }
    else
        res.send("Please select the file to upload!");
    })