Express.js | app.render() Function
The app.render() function is used to rendered HTML of a view via the callback function. This function returns the html in the callback function.
Syntax:
app.render(view, [locals], callback)
Parameters:
- view: It is the name of the HTML page which is to be rendered.
- locals: It is an optional parameter that which is an object containing local variables for the view parameter passed.
- callback: It is a function that is passed as a parameter.
Installation of express module:
- You can visit the link to Install express module. You can install this package by using this command.
npm install express
- After installing express module, you can check your express version in command prompt using the command.
npm version express
- Create a email.ejs file in views folder with the following code:
Filename: email.ejs<html><head><title>Function Demo</title></head><body><h3>Greetings from GeeksforGeeks</h3></body></html>Note: You may use any view engine, like in this case, we have used ejs.
- After that, you can just create a folder and add a file for example, index.js. To run this file you need to run the following command.
node index.js
Filename: index.js
varexpress = require('express');varapp = express();varPORT = 3000;// View engine setupapp.set('view engine','ejs');app.render('email',function(err, html) {if(err) console.log(err);console.log(html);});app.listen(PORT,function(err){if(err) console.log("Error in server setup");console.log("Server listening on Port", PORT);});
Steps to run the program:
- Make sure you have installed express and ejs module using following command:
npm install express npm install ejs
- Run index.js file using below command:
node index.js
Output:
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