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joplin notion extension/Web Development/nodejs/ejs.md

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+ejs
+
+https://www.digitalocean.com/community/tutorials/how-to-use-ejs-to-template-your-node-application
+![How To Use EJS to Template Your Node Application _ DigitalOcean.pdf](../../../_resources/How%20To%20Use%20EJS%20to%20Template%20Your%20Node%20Application%20_.pdf)
+
+layouts
+use this for layouts https://www.npmjs.com/package/express-ejs-layouts
+
+```js
+const express = require('express');
+const expressLayouts = require('express-ejs-layouts');
+const app = express();
+
+// Set EJS as the view engine
+app.set('view engine', 'ejs');
+
+// Use the layouts middleware
+app.use(expressLayouts);
+
+// Optional: Define a default layout file
+app.set('layout', 'layouts/layout'); 
+
+```
+
+layout at `views/layouts/layout.ejs`
+```html
+...
+<body>
+    <main>
+        <!-- Individual page content is injected here -->
+        <%- body %> 
+    </main>
+</body>
+
+
+```
+
+view at `views/index.ejs`
+```html
+<h1>Welcome to my Homepage!</h1>
+<p>This is the main content of the home page.</p>
+
+```
+
+for custom layout
+```js
+app.get('/admin', (req, res) => {
+    res.render('admin-dashboard', { layout: 'layouts/admin-layout' });
+});
+
+```
+
+&nbsp;
+
+when using variable which might be undefined this is safest way to do it
+
+```html
+<% if( typeof keyword!=='undefined' && keyword ){ %>
+	<br>	
+<% } %>
+```