通过express路由调用HTML中的Javascript函数

Calling Javascript function in HTML through express routes

本文关键字：中的 Javascript 函数 HTML 调用 express 路由 通过      更新时间：2024-04-20

在尝试调用function2.js中的函数时出错。该函数是下面的一个简单测试方法createString。我需要调用driver.html中的函数。我使用app.get在服务器文件（app.js）中查找javascript文件，但我一直收到错误"gethttp://localhost:3000/DRIVER/js/function2.js"当我跑步时"http://localhost:3000/DRIVER/"没有名为driver的文件夹。我只需要使用它。js文件夹就在主文件夹中。如何在express routes 中调用html中的js文件夹

函数2.js

function createString() {
  var hash;
  var firstWord = randomWord();
  var secondWord = randomWord();
  var number = Math.floor(Math.random()*999)+1;
  hash = firstWord + number + secondWord;
  return hash.toString();
} 
function randomWord(){
  var words = ["Apple", "Apricot", "Avocado", "Banana", "Blackberry", "Blueberry", "Cherry", "Grapefruit", "Lemon", "Lime",
            "Coconut","Kiwi","Peach","Pear","Pineapple","Melon","Watermelon","Raspberry","Strawberry","Hanger",
            "Grape","Plum","London","Dublin","Moscow","Berlin","Madrid","Paris","Stockholm","Vienna",
            "Chair","Texas","California","Nevada","Florida","Montana","Bravo","Delta","Echo","Hotel",
            "Tango","Whiskey","Foxtrot","Golf","Zulu","Yankee","Magnet","Button","Watch","Red",
            "White","Green","Black","Yellow","Grey","Blue","Pink","Purple","Diary","Bottle",
            "Water","Fire","Wind","Sweet","Sugar","Stamp","Brush","Small","Medium","Large",
            "Brown","Piano","Guitar","Canvas","Carrot","Mouse","Dog","Cat","Squirrel","Truck",
            "Rabbit","Toothbrush","Chalk","Puddle","Elephant","Giraffe","Frog","Falcon","Eagle","Parrot",
            "Shark","Tiger","Butterfly","Turtle","Snake","Fish","Whale","Walrus","Kangaroo","Wolverine"];
  return words[(Math.floor(Math.random()*100)+0)];
}

Driver.html：

<!doctype html>
<html lang="en">
 <head>
 <meta charset="utf-8">
 <title>driver</title>
 <meta name="description" content="The HTML5 Herald">
 <meta name="author" content="SitePoint">
 <!--[if lt IE 9]>
 <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
 <![endif]-->
 </head>
 <body>
 <script src="js/function2.js"></script>
 <script>
    var session = createString();
    console.log(session);
    var url = window.location.href;
    console.log(url);
    var urlNew = url + "/" + session;
    console.log(urlNew);
    window.location.href = urlNew;
    location.replace(link);
    console.log(link);
 </script>
 </body>
 </html>

app.js:

var express = require('express');
var app     = express();
var path    = require("path");
//possible routes
app.get('/', function (req, res) {
  res.sendFile(path.join(__dirname+'/homepage.html'));
});
app.get('/DRIVER/', function (req, res) {
  res.sendFile(path.join(__dirname+'/driver.html'));
  console.log(req.url);
});
app.get('/NAV/', function (req, res) {
  res.sendFile(path.join(__dirname+'/homepage.html'));
  console.log(req.url);
});
var x = '+([A-Z])+([0-9])+([A-Z])+'
app.get('/DRIVER/'+x, function (req, res) {
  res.send('Hello Driver!');
  console.log(req.url);
});
app.get('/NAV/'+x, function (req, res) {
  res.send('Hello Navigator!');
  console.log(req.url);
});
// route to javascript
app.get('/js/function2', function (req, res) {
  res.sendFile(path.join('/js/function2.js'));
  console.log(req.url);
});
app.listen(3000, function () {
  console.log('Example app listening on port 3000!');
});

您必须为此添加express.static

为了提供静态文件，例如图像、CSS文件和JavaScript文件，使用express中的express.static内置中间件功能。

在您的情况下，您必须在第一次应用程序之前添加。设置此行

app.use(express.static('public'));

您必须将公用替换为文件夹

请参阅在Express 中提供静态文件

app.get('/js/function2', function (req, res)：function2 之后没有.js

<script src="js/function2.js"></script>需要/js/function2.js路由

然而express.static最好像js文件一样提供静态内容。。。

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