Pass Node Js Variable to Ejs Template

Pass a variable from javascript to ejs

Here's a very simple example on how app.locals can be used to expose variables to (EJS) templates:

// app.js
var express = require('express');
var app     = express();
var server  = app.listen(3000);

app.locals.myVar = 1;

app.get('/', function(req, res) {
  res.render('index.ejs');
});

// views/index.ejs
<% if (myVar) { %>
  <h1>myVar is here!</h1>
<% } else { %>
  <h1>Boohiss no myVar!</h1>
<% } %>

Passing a variable into every ejs template with app.use not working

pass req.session in locals and then you can use globally username variable in all ejs files

app.use(function (req, res, next) {
    res.locals.username = req.session.username;
    next();
});

now you can call in ejs files

<%= username %>

Passing variable from nodejs to ejs file

You are using single = instead of ==

It should be:

<script>
    if(<%= nbrow %> == 0){
        alert("user not exist");
    }
</script>

Also - regardless to this specific error.

EJS is rendered to html file, so in your browser you can always use 'view source' and see the actual rendered HTML. This way you can debug if the problem is in printing nbrow or the script.

Passing variable from app.js to ejs file into a script tag

res.render() is parameterized. So, try:

res.render("search", {
    myVar: "value"
});

See Express docs for: app.render() and res.render().

Your HTML should look something like this with the <%= myVar %> included.

<html>
<body>
    <h1>Hello</h1>
    <p>Lorem</p>
    <script>
        // Print out the variable I got
        console.log(<%= myVar %>)
        // or
        console.log("<%= myVar %>")
    </script>
</body>
</html>

how to pass variable from one ejs to another ejs in node js

I think you need to submit a value from form1 in page1 and pass that variable to page2

if thats the case you can do like this

const express = require('express'); const bodyParser = require('body-parser');
const app = express();
app.use(bodyParser.urlencoded({ extended: false }));
app.set('view engine', 'ejs');

// send the page1 to the userapp.get('/', (req, res) => {    res.render('page1', { title: 'EJS Demo' });});

//capture the submit from the user and then send another page//to the userapp.post('/submitForm', (req, res) => {    const a = req.body.valueFromA;    res.render('page2',a);});
app.listen(3000, () => {    console.log('Listening....');});

<form name="input" action="\home" method="post">      <input type='checkbox' checked>Cheese    <input type="submit" value="Submit" href="validation.ejs"></form>
<!-- page1 form1 -->
<html><head>  <title> <& title &> </title></head>  <form action='/submitForm' method='post'>    <input type='text' value='' name='valueFromA' />    <input type='submit' />  </form></html>

<!-- page2 ejs -->
<html>  <body>    <p> <% value %> </p>  </body></html>
b.ejs has
<h1><% post my variable here%></h1>in my node js this is what i did const

Passing Variable with EJS Templating

You're not passing an array variable called blogpost to your template, you are instead passing these variables to your template:

title: blogpost.title,
author: blogpost.author,
content: blogpost.content,
date: blogpost.date

You could just do this render() instead of the one you currently have:

res.render('pages/blog', {
  blogpost: blogpost,
});