Express JS：所请求的资源上不存在“ Access-Control-Allow-Origin”标头

除了将请求标头设置为快速路由之外，您还可以尝试将其设置为表达实例本身吗？

var express = require('express');var app = express();var Assessment = require('../app/models/assessment');app.use(function(req, res, next) {  res.header("Access-Control-Allow-Origin", "*");  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");  next();});app.post('/api/status', function (req, res, next) {    // your pre goes here});module.exports = app;

希望这可以帮助！