node app not visible in browser aws ec2

ByAnurag batra September 26, 2022September 6, 2022

    var express = require('express');
var app = express();

app.listen(3000, ()=>  {
    console.log('listening');
});

app.get('/',(req,res)=>  {
    res.send('hi');
});

Here is what the above code is Doing:
1. We’re requiring the express module.
2. We’re creating an express app.
3. We’re telling the app to listen on port 3000.
4. We’re telling the app to respond to a GET request to the root URL (‘/’) with the text ‘hi’.
5. We’re telling the app to respond to a GET request to the /bye URL with the text ‘goodbye’.
6. We’re telling the app to respond to a GET request to any other URL with the text ‘page not found’.

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clear cache javascript

ByAnurag batra September 27, 2022September 6, 2022

Press the button F12 Go to settings and then to the Network: Now click “Disable Cache (while DevTools are open)” Then click and hold the mouse button on the reload page and select the last option (Reload site and delete Cache) Here is what the above code is Doing: 1. The first line is importing…

Javascript Examples

nuxt function call top scroll to top

ByAnurag batra August 2, 2022June 30, 2022

scrollToTop() { window.scrollTo(0,0); } Here is what the above code is Doing: 1. We are creating a function called scrollToTop() 2. We are using the window.scrollTo() method to scroll to the top of the page. 3. We are calling the scrollToTop() function when the user clicks on the button.

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javascript multiply arguments

ByAnurag batra July 6, 2022June 30, 2022

const mul = (…args) => args.reduce((a, b) => a * b); // Example mul(1, 2, 3, 4); // 24 Here is what the above code is Doing: 1. The function mul takes in any number of arguments. 2. The reduce method is called on the arguments object. 3. The reduce method loops through each item…

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regular expression characters

ByAnurag batra July 14, 2022June 30, 2022

/* shorthand character classes */ regex = /d/; // matches any digit, short for [0-9] regex = /D/; // matches non-digits, short for [^0-9] regex = /S/; // matches non-white space character regex = /s/; // matches any white space character regex = /w/; // matches character, short for [a-zA-Z_0-9] regex = /W/; // matches…

Javascript Examples

jquery alertify

ByAnurag batra October 9, 2022September 6, 2022

/* * @title {String or DOMElement} The dialog title. * @message {String or DOMElement} The dialog contents. * @onok {Function} Invoked when the user clicks OK button or closes the dialog. * * alertify.alert(title, message, onok); * */ alertify.alert(‘Alert Title’, ‘Alert Message!’, function(){ alertify.success(‘Ok’); }); Here is what the above code is Doing: 1. We’re…

Javascript Examples

save canvas as image from website

ByAnurag batra September 30, 2022September 6, 2022

var canvas = document.getElementById(“alpha”); var dataURL = canvas.toDataURL(“image/png”); var newTab = window.open(‘about:blank’,’image from canvas’); newTab.document.write(“”); Here is what the above code is Doing: 1. It’s getting the canvas element from the DOM. 2. It’s converting the canvas to a data URL. 3. It’s opening a new tab and writing the data URL to the tab.

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