我正在尝试node.js和一些hello world示例,我收到此错误
TypeError: undefined is not a function
at c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\server.js:10:13
at Layer.handle [as handle_request] (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\layer.js:95:5)
at next (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\route.js:131:13)
at Route.dispatch (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\layer.js:95:5)
at c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\index.js:277:22
at Function.process_params (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\index.js:330:12)
at next (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\index.js:271:10)
at expressInit (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\middleware\init.js:33:5)
at Layer.handle [as handle_request] (c:\users\admin\documents\visual studio 2015\Projects\TheBoard\TheBoard\node_modules\express\lib\router\layer.js:95:5)
这是我的代码
var http = require("http");
var express = require("express");
var app = express();
app.get("/",
function(res, req) {
res.send("<html><body><h1>Express</h1></body></html>");
});
app.get("/api/users",
function(req, res) {
res.send({ name: "Louis", isValid: true, group: "Admin" });
});
var server = http.createServer(app);
server.listen(3000);
时才收到错误消息
后,我没有收到任何错误消息
答案 0 :(得分:3)
参数排序中的问题.. req对象没有任何发送功能。
var http = require("http");
var express = require("express");
var app = express();
app.get("/",
function(req, res) {
res.send("<html><body><h1>Express</h1></body></html>");
});
app.get("/api/users",
function(req, res) {
res.send({ name: "Louis", isValid: true, group: "Admin" });
});
var server = http.createServer(app);
server.listen(3000);
答案 1 :(得分:1)
app.get(&#34; /&#34;)的功能不正确。您传递参数的顺序不正确。正确的方法是首先提供请求对象,然后提供响应对象。正确的方法是这样写:
app.get("/",
function(req, res) {
res.send("<html><body><h1>Express</h1></body></html>");
});
希望这对你有用。 :)