javascript Articles

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What is memoization and how to cache function results in Javascript

What is memoization and how to cache function results in Javascript

Javascript memoization is an optimizing technique to reduce time consuming calculations. It's a type of caching which store previous results in the memory.

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Convert HTMLCollection into array in JavaScript

Convert HTMLCollection into array in JavaScript

Post on how to convert HTMLCollection to an array to apply forEach() method on its element to loop in JavaScript.

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Get the name of the month from a date in Javascript

Get the name of the month from a date in Javascript

Find out how to get the name of the month from a date object using JavaScript. Get the name of the month using date's toLocaleString method method.

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[Solved] date.getDate() is not a function error in JavaScript

[Solved] date.getDate() is not a function error in JavaScript

Find out how to solve the date object error, TypeError: date.getDate() is not a function in JavaScript.

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Check if a timestamp/date is today in JavaScript

Check if a timestamp/date is today in JavaScript

Find out how to check if input date is equal to today's date using JavaScript. Convert the timestamp or date to valid date object and compare it to current day.

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Convert and Save HTML elements as Image using JavaScript

Convert and Save HTML elements as Image using JavaScript

Find out how to convert a div to image without using canvas in JavaScript. Here we will save an HTML element as image using html2canvas package.

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Create Scroll to Top button using JavaScript

Create Scroll to Top button using JavaScript

Find out how to create scroll to top button to scroll to the top of the page using vanilla javascript with the help of window.scroll funcltion.

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Check if String starts with a space in JavaScript

Check if String starts with a space in JavaScript

Find out whether a string starts with a space or not using regex test method, string match method and startsWith method in JavaScript.

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JavaScript - Detect if a string contains any space

JavaScript - Detect if a string contains any space

FInd out how to detect if a string contains any white space using regex test() method and string indexOf() method in Javascript.

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5 ways to flatten nested array in JavaScript

5 ways to flatten nested array in JavaScript

Short tutorial on five different ways on how to convert nested array into flat array (single array) in JavaScript.

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How to Clone/Copy a Object in JavaScript

How to Clone/Copy a Object in JavaScript

Find out how to clone/copy in Javascript. Understand what is shallow copy and deep clone a JavaScript object.

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Get the current directory/folder in Node Js

Get the current directory/folder in Node Js

Find out how to get the current folder or directory path where a Javascript code is executed in Node.

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Delete a file in Node using unlink() and unlinkSync() method

Delete a file in Node using unlink() and unlinkSync() method

Short tutorial on how to remove a file from the file system in node js using unlink() and unlinkSync() functions.

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Add property to each object in an array of object in JavaScript

Add property to each object in an array of object in JavaScript

Short article on how to add property to each object in an array of objects using JavaScript.

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Change Element Class using JavaScript

Change Element Class using JavaScript

Short article on how to change the class name from an element using JavaScript classList.add() and classList.remove() method.

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JavaScript - Get Month Name from Date

JavaScript - Get Month Name from Date

Find out how to get the name of the month from JavaScript Date object using toLocaleString method andd Intl.DateTimeFormat object.

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How to split First name and Last name in JavaScript

How to split First name and Last name in JavaScript

Short article to separate first name and last name in a form field using split method in JavaScript.

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How to change image on hover JavaScript

How to change image on hover JavaScript

Short article on how to change the source of the image <img> tag on hover using JavaScript.

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Change image src using onClick event in JavaScript

Change image src using onClick event in JavaScript

Find out how to change or replace the image src (source) on click of a button using onClick() event in JavaScript.

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Convert  Kilometers to Miles using JavaScript program

Convert Kilometers to Miles using JavaScript program

Find out how to write a JavaScript function that takes a number and converts kilometers to miles i.e km to mi.

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Split a String into chunks of N character into an array in JavaScript

Split a String into chunks of N character into an array in JavaScript

Find out how to split String into Substrings by length of N characters in JavaScript using split(), match() and substr() methods.

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How to split string after specific character in JavaScript

How to split string after specific character in JavaScript

Find out how to split the string at specific character in your string using split() method in JavaScript.

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Create multiline string in JavaScript | Split string to Multilines

Create multiline string in JavaScript | Split string to Multilines

Find out how to create multiline string in JavaScript using string concatenation, blackslash and template literals.

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How to display JavaScript variable value in HTML

How to display JavaScript variable value in HTML

Short tutorial on how to display JavaScript variable values in HTML using three ways , using innerHTML, document.write() and window.alert().

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How to find the size of the file in Node JS

How to find the size of the file in Node JS

Short tutorial on how to find file size of any file like image or text document in node js using the file system module.

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Find the average of n numbers using JavaScript

Find the average of n numbers using JavaScript

Tutorial to write a JavaScript function to find the average of n numbers of items in an Array using JavaScript.

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How to find the median value of an array using JavaScript

How to find the median value of an array using JavaScript

Short tutorial on how to find median of odd and even numbers of values in an array using JavaScript.

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JavaScript - Show and hide div on button click using JavaScript

JavaScript - Show and hide div on button click using JavaScript

This post is about how to show and hide a div on button click using JavaScript. We will change the CSS property of the element using JavaScript to hide and show the content.

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How to read text file in JavaScript (line by line)

How to read text file in JavaScript (line by line)

This article is about how to read text file in JavaScript line-by-line from local computer using Html input field.

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Enable or Disable button programmatically using JavaScript

Enable or Disable button programmatically using JavaScript

This article is on how to programmatically enable or disable button using JavaScript.

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Detect Dark Mode | Color Mode Change using JavaScript and CSS

Detect Dark Mode | Color Mode Change using JavaScript and CSS

Find out how to detect dark mode and detect mode change using JavaScript and CSS in modern browsers like chrome, edge, firefox.

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Check if a HTML checkbox is checked using JavaScript

Check if a HTML checkbox is checked using JavaScript

Find out how to check if the checkbox is checked or not using JavaScript.

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Change Text Color Using JavaScript with Example

Change Text Color Using JavaScript with Example

This post is about how to change color of text in HTML using JavaScript with and without clicking a button.

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JavaScript: Change Background Color of a Webpage.

JavaScript: Change Background Color of a Webpage.

Find out how to change the background color of the body tag or a div in a web page using JavaScript.

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Best way - Split an array into half in Javascript

Best way - Split an array into half in Javascript

To divide an single array into half i.e into two different arrays without modifying the original array we can use Array.slice() method in JavaScript.

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Get multiple elements by Id using JavaScript

Get multiple elements by Id using JavaScript

To select elements by multiple Ids using JavaScript we have to use document.querySelectorAll() method instead getElementById() method in JavaScript.

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Confirmation Box  with Yes or No button in JavaScript

Confirmation Box with Yes or No button in JavaScript

Find out how to create confirmation dialog box to confirm yes or no in JavaScript using confirm() method.

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Get user location from browser using JavaScript

Get user location from browser using JavaScript

Tutorial on how to get user location like latitude and longitude from our browser using geolocation() function in JavaScript.

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Convert seconds to minutes and seconds (mm:ss) using JavaScript

Convert seconds to minutes and seconds (mm:ss) using JavaScript

Find out how to convert seconds to minutes and second format mm:ss using toString() and padStart() in JavaScript.

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Merge Two Arrays and Remove Duplicates - JavaScript

Merge Two Arrays and Remove Duplicates - JavaScript

Tutorial on how to merge two or more array and remove duplicates in JavaScript.

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Replace all occurrences of a string in JavaScript

Replace all occurrences of a string in JavaScript

Tutorial on How to replace all occurrences of a string in JavaScript using replace() with regular expression (regex)

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Use Array forEach() to loop through JavaScript object

Use Array forEach() to loop through JavaScript object

FInd out how to use forEach in an object and return key, value and also convert it's properties to an array using JavaScript.

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JavaScript - Convert Days to Seconds

JavaScript - Convert Days to Seconds

Tutorial to write a program to convert days to seconds using JavaScript.

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JavaScript - Iterate over the properties of an object

JavaScript - Iterate over the properties of an object

Quick tutorial on how to iterate over object properties in JavaScript using for in loop statement and Object.entries() method.

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How to Get the ID of a Clicked Button or Element in JavaScript

How to Get the ID of a Clicked Button or Element in JavaScript

Find out how to get the id of a button when clicked in JavaScript using onclick event listener and passing on the this.id or this.target.id.

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How to check if a variable is a string in JavaScript

How to check if a variable is a string in JavaScript

Short article to check if a variable is a string or not using typeof operator in JavaScript.

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JavaScript - How to export multiple functions from a file

JavaScript - How to export multiple functions from a file

In this article, we will be covering how we can export and import multiple functions in JavaScript.

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How to find exponent power of a number in JavaScript

How to find exponent power of a number in JavaScript

Find out how to get the exponent power of a number with and without using the Math.pow() method in JavaScript.

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How to multiply all numbers in an array using JavaScript

How to multiply all numbers in an array using JavaScript

Quick tutorial on how to multiply all the elements in an array using iterative i.e loop and reduce method in JavaScript.

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How to convert string to array in JavaScript

How to convert string to array in JavaScript

Find out how to convert a string to an array in JavaScript using split() , spread operator and Array.from() methods.

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Get the index of an item in an array in JavaScript

Get the index of an item in an array in JavaScript

A quick tutorial on how to find the index of an item or element in an array in JavaScript.

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Return multiple values from a function in JavaScript

Return multiple values from a function in JavaScript

Tutorial on how to return multiple values i.e more than one value from a function in JavaScript.

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How to check if String contains only spaces in JavaScript

How to check if String contains only spaces in JavaScript

Quick way to check if a string contains only spaces or have empty string using trim() and regular expression using JavaScript.

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Round to the nearest hundredth of a decimal in JavaScript

Round to the nearest hundredth of a decimal in JavaScript

FInd out how to round off an floating value i.e a decimal number to the nearest hundredth using Math.round() and toFixed() method in javascript.

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Check if a key exists in an Object in JavaScript

Check if a key exists in an Object in JavaScript

Short article on how to check if a key exists in a JavaScript object using in operator and hasOwnProperty method.

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JavaScript hasOwnProperty() method of an Object

JavaScript hasOwnProperty() method of an Object

Tutorial about the Javascript hasOwnProperty() method of an object, its use, advantages and limitations.

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5 ways to convert string to number in JavaScript

5 ways to convert string to number in JavaScript

Find out how to convert a string to a number in JavaScript using parseInt(), parseFloat(), unary plus and math.round method.

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Fill array with incrementing numbers/ intergers using JavaScript

Fill array with incrementing numbers/ intergers using JavaScript

Find out how to fill an array with incrementing numbers/integers using JavaScript's for loop and Array.from() method with keys().

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How to add getter to an existing JavaScript Object

How to add getter to an existing JavaScript Object

Short tutorial on adding a getter to an existing JavaScript object using Object.defineProperty method.

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How to redirect to another web page/ website using JavaScript

How to redirect to another web page/ website using JavaScript

Find out how to redirect to another web page or website using JavaScript location object

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How to get current position of the mouse in JavaScript

How to get current position of the mouse in JavaScript

Find out how to get the current position of the mouse from a JavaScript mousemove event.

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How to get value from JSON object in JavaScript

How to get value from JSON object in JavaScript

Short article on how to get or fetch a value from a JSON object in JavaScript using JSON.parse() method.

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How to detect an undefined object properties in JavaScript?

How to detect an undefined object properties in JavaScript?

Find out how to detect an undefined object properties in JavaScript using typeof method.

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Pretty Print JSON Programmatically using JavaScript

Pretty Print JSON Programmatically using JavaScript

Find out how to beautify or pretty print a JSON string Programmically in JavaScript.

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How to add dynamic Key to an object in JavaScript

How to add dynamic Key to an object in JavaScript

Short tutorial on how to create and add dynamic key to an object in JavaScript using bracket syntax and ES6 methods.

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How to get object keys from JavaScript object ?

How to get object keys from JavaScript object ?

Find out how to get object's key from JavaScript Object using object.keys() method or for...in loop.

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Check if multiple values exists in an array using JavaScript

Check if multiple values exists in an array using JavaScript

Tutorial on How to check if multiple values exist within an JavaScript array using includes(), every() and indexOf() method.

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Convert a Unix timestamp to time in JavaScript

Convert a Unix timestamp to time in JavaScript

Find out how to convert a unix timestamp to time format in JavaScript using toLocaleTimeString() method.

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How to covert JavaScript object to JSON string?

How to covert JavaScript object to JSON string?

Find out how to convert JavaScript object to JSON string using JSON.stringify() method.

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How to convert a JSON string into a JavaScript object

How to convert a JSON string into a JavaScript object

Find out how to convert a JSON string into a JavaScript object using JSON.parse() method.

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Difference between JSON.stringify() and JSON.parse() in JSON

Difference between JSON.stringify() and JSON.parse() in JSON

Article on the difference between JSON method, JSON.stringify() and JSON.parse() in JSON

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How to remove a property from an object in JavaScript?

How to remove a property from an object in JavaScript?

This article is about how to remove a property from an object in javascript using delete operator.

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Convert array to string with brackets and quotes in JavaScript

Convert array to string with brackets and quotes in JavaScript

Short article on how to convert an array to a string while preserving brackets and quotes.

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Append Item To Array In JavaScript

Append Item To Array In JavaScript

This article is about how to add or append items in an array using push() and spread operator.

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Capitalize First Letter of a String in JavaScript

Capitalize First Letter of a String in JavaScript

This article is about how to capitalize the first letter of a string using JavaScript.

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How to Check null Values in JavaScript? | isNull() JavaScript

How to Check null Values in JavaScript? | isNull() JavaScript

Find out how to check if object values is null in JavaScript using isNull() function.

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How to stop and exit a Function In JavaScript?

How to stop and exit a Function In JavaScript?

Find out how to stop or exit a function in javascript using return statement or try catch statement.

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JavaScript : 5 Ways to Empty an Array

JavaScript : 5 Ways to Empty an Array

A short tutorial on different methods on how to empty or clear an array in JavaScript along with examples.

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Compare Two Strings in JavaScript | String Comparison

Compare Two Strings in JavaScript | String Comparison

Tutorial on how to compare two case insensitive strings in JavaScript. Using localeCompare() to do string comparison with case-sensitive strings.

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How to Remove Object from Array in JavaScript?

How to Remove Object from Array in JavaScript?

Tutorial article on how to remove object from an array in javascript using splice(), slice() and filter() methods.

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How to write isNumber() in JavaScript?

How to write isNumber() in JavaScript?

Tutorial on how to code a isNumber() function to check if a value is a number or not in JavaScript.

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How can I do String interpolation in JavaScript?

How can I do String interpolation in JavaScript?

Article on different ways we can do string interpolation in JavaScript using template literals or string templates.

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Truncate A String in JavaScript with Example

Truncate A String in JavaScript with Example

Find out how to truncate a string or paragraph in JavaScript using string length property and slice() or substr() method.

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Add New Line In JavaScript with Example Codes

Add New Line In JavaScript with Example Codes

Tutorial on how to add or print new line in JavaScript console and in DOM output.

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Add Days to a Date in JavaScript with Example

Add Days to a Date in JavaScript with Example

Tutorial on how to add days to a date using JavaScript methods like getDate() and setDate().

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JavaScript - How to Remove Character From A String.

JavaScript - How to Remove Character From A String.

Find out how to remove character from a string in JavaScript using replace() and split and join method.

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Compare Elements of Two Arrays in JavaScript

Compare Elements of Two Arrays in JavaScript

Find out how to compare elements of two arrays in JavaScript using JSON.stringify(), toString(), every() or Lodash and uderscorejs.

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Get Tomorrow's Date using JavaScript - Quick Way

Get Tomorrow's Date using JavaScript - Quick Way

Tutorial on how to get tomorrow's date using JavaScript and momentjs library

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Check if String Is a Number or Not in JavaScript

Check if String Is a Number or Not in JavaScript

Tutorial on how can I check if a string is a valid number or not in JavaScript.

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Check If a file or folder exist in NodeJS | Javascript

Check If a file or folder exist in NodeJS | Javascript

Tutorial about how to check if a file or folder exist in your file system synchronously or asynchronously in Nodejs.

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Check if String is Empty in JavaScript

Check if String is Empty in JavaScript

This tutorial is about how to check if a string is empty in JavaScript.

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How to Randomise/shuffle array elements using JavaScript

How to Randomise/shuffle array elements using JavaScript

Tutorial on how to randomise shuffle an array in JavaScript.

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Retrieve random item from an array in JavaScript

Retrieve random item from an array in JavaScript

This post is about how to write a program to retrieve random item from an array in JavaScript.

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Generate Random Number in a specific range in JavaScript

Generate Random Number in a specific range in JavaScript

This post is about how to generate random number in a given range in JavaScript.

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Solution-Merge two or more arrays in JavaScript

Solution-Merge two or more arrays in JavaScript

This post is about how to merge two or more arrays together using JavaScript.

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Quick Way to Reverse an Array in JavaScript

Quick Way to Reverse an Array in JavaScript

This post is about how to reverse an array in JavaScript using reverse() and unshift() methods.

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Remove Whitespace from JavaScript String

Remove Whitespace from JavaScript String

This post is about how to remove whitespace from a string in JavaScript.

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How to copy or clone an array in JavaScript

How to copy or clone an array in JavaScript

This post is about how to copy or clone an array in JavaScript using in-built JavaScript methods.

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How to convert an array to string in Javascript

How to convert an array to string in Javascript

This post is about how to convert an array to string in JavaScript with or without commas.

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Get Current Date in Different Date Formats in JavaScript

Get Current Date in Different Date Formats in JavaScript

This article is about how to get JavaScript current date in different formats likes mm-dd-yyyy or dd-mm-yyyy.

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Check if a string contains a substring in Javascript

Check if a string contains a substring in Javascript

This article is about how to check if a string contains a substring using JavaScript methods.

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Convert String To Float in JavaScript

Convert String To Float in JavaScript

This article is about how to convert a string to float using parseFloat() function in JavaScript.

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Copy text from an HTML element to clipboard-JavaScript

Copy text from an HTML element to clipboard-JavaScript

This article is about how to copy text from an html element to clipboard using JavaScript. You can copy from element with input field.

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How to Remove Last Character from a string in javascript

How to Remove Last Character from a string in javascript

This article is about how to remove last character from a string using JavaScript using splice() and substring() method.

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Code on how to get Yesterday date in JavaScript

Code on how to get Yesterday date in JavaScript

This article is about how to get yesterday's date in JavaScript. We will get current date using new Date() and the substract one day from it.

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Remove first and last element from an array in JavaScript

Remove first and last element from an array in JavaScript

This article is about how to remove first or last element from an array in JavaScript using in-built functions like pop(), shift() and splice().

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Sort an array of String with non-ASCII characters.

Sort an array of String with non-ASCII characters.

This article is how to sort an array of string with non-ASCII characters. Using localeCompare() we can sort mixed array with non-ascii characters.

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How to insert an item into an array at a specific index in JavaScript?

How to insert an item into an array at a specific index in JavaScript?

This article is about how to insert a item or element in a specific index in an array in javascript.

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Single-line and Multi-line Comment | Javascript Comment

Single-line and Multi-line Comment | Javascript Comment

This article is about single-line and multi-line comments in JavaScript and it why it is important to comment our codes while programming.

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How to Check if Object is Empty in JavaScript

How to Check if Object is Empty in JavaScript

This article is about how to check if object is empty in javascript. we will be using hasownproperty(), Object.keys() method and lodash to check empty object.

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Check if an array includes a value/element in javascript.

Check if an array includes a value/element in javascript.

This article is about how to check if an array includes a particular element or value in JavaScript. Using includes() method we can check the item in an array.

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3 ways to loop an array in JavaScript | Quick ways

3 ways to loop an array in JavaScript | Quick ways

This article is about ways to loop in JavaScript. we will learn three ways to liip in javascript: forEach, for of loop and for loop using javascript.

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How to remove a specific item from an array in JavaScript ?

How to remove a specific item from an array in JavaScript ?

This post is about how to remove a specific item from an array in JavaScript using indexOf and splice method.

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3 Ways to Combine Multiple Strings into a Single String | Concatenate Strings

3 Ways to Combine Multiple Strings into a Single String | Concatenate Strings

This tutorial is about how to combine or join multiple strings in to a single string in javascript. we will learn three ways to concatenate add string in javascript.

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3 Ways to generate random string/characters in JavaScript

3 Ways to generate random string/characters in JavaScript

We will learn about three ways on how to generate random strings/characters in javascript. We will use Math.random() method, shortid npm module and inbuilt method toString() method in javascript.

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How to create Multiline string in JavaScript?

How to create Multiline string in JavaScript?

This article is about how to create multiline string or comment in javascript. To create multil-ine string we will be using template literals in javascript.

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How to convert an array of objects to an object in JavaScript ?

How to convert an array of objects to an object in JavaScript ?

This article is about how to convert an array of objects to a single object in Javascript using Object.assign() method and spread operator.

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How to merge two or more objects into one object in Javascript?

How to merge two or more objects into one object in Javascript?

In this article we will merge two or more objects into one object with both their properties using object.assign method and spread operator in javascript.

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How to sort an array alphabetically in javascript?

How to sort an array alphabetically in javascript?

This article is about how to sort an array alphabetically in javascript. In javascript we have a sort() method which sort elements of an array in place in ascending order.

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Convert javascript array to object of same keys/values

Convert javascript array to object of same keys/values

This article is about how to convert javascript array to object of same keys/values. To convert the array to object of same keys/values pair we will use reduce() method in javascript.

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How to convert an array to object in javascript?

How to convert an array to object in javascript?

Here, we will learn how to convert an array into an object in javascript. we will use Object.assign() method and spread operators to convert it to an object.

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Prevent body from scrolling when a modal is opened.

Prevent body from scrolling when a modal is opened.

Here, in this article we will learn on how to prevent body from scrolling when a modal is opened using javascript and wheel eventListener. It will disable the scroll when the modal is open.

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Disable scrolling Behaviour on a body with element on position fixed in mobile.

Disable scrolling Behaviour on a body with element on position fixed in mobile.

In this article we will learn on how to disable the scroll behaviour of a body on a element with position fixed on mobile devices..

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Format a number to specific number of decimal places in Javascript.

Format a number to specific number of decimal places in Javascript.

here, we will learn on how to format a number to a specific number of decimal places in javascript using toFixed() method.

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How to repeat a string n number of times in JavaScript

How to repeat a string n number of times in JavaScript

Article on how to repeat a string n number of times in JavaScript. We will use the inbuilt function repeat() and also code a custom repeat function to repeat a string.

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Convert date to long date format using Javascript

Convert date to long date format using Javascript

Learn how to convert a date to a long date format using Javascript. To convert it to a long format we will be using a toLocaleDateString() method in javascript.

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Get the 10 characters from a string using Javascript.

Get the 10 characters from a string using Javascript.

How to get the first 10 character from a string using Javascript. Here we will extract the first 10 character from a string using the substring() method in javascript.

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