Javascript

If you need to download a file in NodeJS without using any third party libraries, then you can do the following. The NodeJS ecosystem comes with a fs module, this is to denote the FileSystem built in library. First declare your imports: const http = require('https'); const fs = require('fs'); Now you can use the https module to download a file, and write it to a stream using fs. const https = require("https"); const fs = require("fs"); const endpoint = "https://example/files/some_csv_file"; https....

If you need to execute a shell script in NodeJS, then you can use the exec keyword. Syntax: exec(command [, options] [, callback] const shell = require('shelljs') shell.exec("npm --version")

If you need to convert Milliseconds to Date in Javascript, then you can do the following: How to Convert Milliseconds to Date in Javascript let date = new Date(milliseconds); date.toString(); Common Date Conversions From Milliseconds in Javascript let originalDate = new Date(milliseconds); // output: "D/MM/YYYY, H:MM:SS PM/AM" originalDate.toLocaleString(); //output: "D/MM/YYYY" originalDate.toLocaleDateString(); // output: "Day Month DD YYYY" originalDate.toDateString(); // output: "HH:MM:SS GMT+0530" originalDate.toTimeString(); // output: "Day Month DD YYYY HH:MM:SS GMT+0500" originalDate....

If you need to convert a String to Title Case in Javascript, then you can do one of the following: Option 1 – Using a for loop function titleCase(str) { str = str.toLowerCase().split(' '); for (var i = 0; i < str.length; i++) str[i] = str[i].charAt(0).toUpperCase() + str[i].slice(1); return str.join(' '); } console.log(titleCase("this is an example of some text!")); Output: This Is An Example Of Some Text! Option 2 – Using map() function titleCase(str) { return str....

If you would like to deploy a React App to AWS S3 and AWS CloudFront, then you can follow this guide. The following solution creates a React App and deploys it to S3 and CloudFront using the client’s CLI. It also chains commands so that a React build, S3 sync and CloudFront invalidation can occur with a single command. Code available at GitHub https://github.com/ao/deploy-react-to-s3-cloudfront Target Architecture Guided Deployment Solution Create a directory for the application:...

In react-router-dom v6, Switch is replaced by routes Routes. You need to update the import from: import { Switch, Route } from "react-router-dom"; to: import { Routes, Route } from 'react-router-dom'; You also need to update the Route declaration from: <Route path="/" component={Home} /> to: <Route path='/welcome' element={<Home/>} />

If you need to get all the checked checkboxes using Javascript, then you can do the following: Option 1 – In a single line const checkedBoxes = document.querySelectorAll('input[name=mycheckboxes]:checked'); Option 2 – Another one liner const data = [...document.querySelectorAll('.mycheckboxes:checked')].map(e => e.value); Option 3 – Create a helper function function getCheckedBoxes(checkboxName) { var checkboxes = document.getElementsByName(checkboxName); var checkboxesChecked = []; for (var i=0; i<checkboxes.length; i++) { if (checkboxes[i].checked) checkboxesChecked.push(checkboxes[i]); } } return checkboxesChecked....

If you want to create a hashtag generator in Javascript, then you can do the following: function generateHashtag(string) { if (string.trim() === '') return false; const stringWithCamelCase = string .split(' ') .map(word => word.charAt(0).toUpperCase() + word.slice(1)) .join(''); const stringWithHashtag = `#${stringWithCamelCase.trim()}`; return stringWithHashtag.length > 140 ? false : stringWithHashtag; } How to use the Hashtag Generator const hashtag = generateHashtag("My New Hashtag !") console.log(hashtag); // #MyNewHashtag!

You can implement a function to be called before the user leaves a page with Javascript as follows: window.onbeforeunload = function(e) { return "Do you want to exit this page?"; }; This is a typically solution for when you want the user to confirm their changes are saved before allowing them to close the current page in editing tools.

If you need to style an element using Javascript then you can use the style object to support all your CSS needs. <html> <body> <p id="p1">Hello World!</p> <script> document.getElementById("p1").style.color = "red"; </script> <p>The paragraph above was changed by a script.</p> </body> </html> If you need to do this purely in a Javascript file itself, then: // Get a reference to the element var myElement = document.querySelector("#p1"); // Now you can update the CSS attributes myElement....