Given An application instance app are set to the variable, which of the following function calls would Middleware called logger ?
Answer:
Default MiddlewareApp.use (logger);
What's the only middleware this ' s shipped with Express 4?
Answer:express-static
Express StaticChange the app.js express-static Middleware instead of the response.sendFile() function.
var express = require (' Express '); var app = Express (); App.get (function (request, Response) { + '/public/ Index.html ');}); App.get (function(req, res) { var cities = [' Lotopia ', ' Caspiana ', ' Indigo ' ]; Res.send (cities);}); App.listen (3001);Remove our app.get() containing the root ‘/‘ route.
Mount the static middleware and serve files under the public directory.
Answer:
var express = require (' Express '); var app = Express (); /* app.get ('/', function (request, response) { response.sendfile (__dirname + '/public/index.html ');}); */ // CDPublic app.use (express.static (' public ')); App.get (function(req, res) { var cities = [' Lotopia ', ' Caspiana ', ' Indigo ']; Res.send (cities);}); App.listen (3001);Now we can add some client side JavaScript by including the jquery.js and client.js files.
Within index.html , include jquery.js using a <script> tag.
Within index.html , include client.js using a <script> tag.
Now on client.js the file, complete the code for $.get the function so it calls /cities the URL path, and then runs the function.
<!DOCTYPE HTML><HTMLLang= "en"><Head> <MetaCharSet= "UTF-8"> <title>Cities</title></Head><Body> <H1>Cities</H1> <ulclass= ' city-list '></ul> <Scriptsrc= "Jquery.js"></Script> <Scriptsrc= "Client.js"></Script></Body></HTML>
Now on client.js the file, complete the code for $.get the function so it calls /cities the URL path, and then runs the function.
$ (function() { $.get ('/cities ', appendtolist); function Appendtolist (cities) { var list = []; for (var in cities) { List.push ($ (' <li> ', {text:cities[i]}); } $ ('. City-list '). Append (list); }});[Express] Level 2:middleware--1
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
