2. HowTo
3. JavaScript Howtos

JavaScript String

• Get Last Character of a String in JavaScript
• Convert a String Into a Date in JavaScript
• Get First Character From a String in JavaScript
• Convert Array to String in JavaScript
• Check String Equality in JavaScript
• Replace All Instances of a String in JavaScript
• Force JavaScript to Deep Copy a String
• JavaScript Equivalent to Printf or String.Format
• Compare Strings in JavaScript
• Sort Strings in JavaScript
• The Difference Between String.slice and String.substring in JavaScript
• Convert Object to String in JavaScript
• Check if Sring Is a Number in JavaScript
• Convert Integer to String in JavaScript
• Add Character to String in JavaScript
• Convert String Into Array in JavaScript
• Remove Last Character From String in JavaScript
• Split String Into Array in JavaScript
• JavaScript Append to String
• JavaScript String Encryption and Decryption
• JavaScript Insert Variable Into String
• Convert a String Into a Number in JavaScript
• Write a Multiline String in JavaScript
• Check if a String Contains Substring in JavaScript
• Case Insensitive String Comparison in JavaScript
• Remove Substring From String in JavaScript
• Remove a Character From a String in JavaScript
• Do String Interpolation in JavaScript
• Generate Random String in JavaScript
• Remove Spaces From a String in JavaScript
• Convert String to Lower Case in JavaScript
• JavaScript Remove the First Character From String
• Check for an Empty String in JavaScript
• Convert a String to Boolean in JavaScript
• Capitalize the First Letter of a String in JavaScript

JavaScript DateTime

• Get Name of Month in JavaScript
• Get Current Time in JavaScript
• Validate a Date in JavaScript
• Convert UTC to Local Time in JavaScript
• JavaScript Get Current Date Time
• Get Week Number of the Year in JavaScript
• Initialize JavaScript Date to a Particular Time Zone
• Get Current Year in JavaScript
• Compare Two Dates in JavaScript

JavaScript Array

• Check if Array Contains Value in JavaScript
• Create Array of Specific Length in JavaScript
• Convert Array to String in JavaScript
• Remove First Element From an Array in JavaScript
• Search Objects From an Array in JavaScript
• Convert Arguments to an Array in JavaScript
• Convert Set to Array in JavaScript
• Count Certain Elements of an Array in JavaScript
• Difference Between Two Arrays in JavaScript
• Zip Two Arrays in JavaScript
• Filter Object Arrays Based on Attributes in JavaScript
• Permutations in JavaScript
• Convert Object to Array in JavaScript
• Sort an Array of Integers in JavaScript
• Sort Array of Objects by Single Key With Date Value
• Implement Arraylist in JavaScript
• Get First Element of Array in JavaScript
• Update Array Values in JavaScript
• Load CSV to Array in JavaScript
• Sort Array of Object by Property in JavaScript
• Convert Array to JSON in JavaScript
• Find Index of Object in JavaScript Array
• Array vs Object Declaration in JavaScript
• Clone an Array in JavaScript
• Convert String Into Array in JavaScript
• Remove Object From an Array in JavaScript
• Split String Into Array in JavaScript
• Split an Array Into Chunks in JavaScript
• Remove Last Element From Array in JavaScript
• Find Max/Min Value in JavaScript Array
• JavaScript Pick Random Value From Array
• JavaScript Reverse Array
• JavaScript Stack and Queue
• JavaScript Unique Array
• JavaScript Append Array to Another
• JavaScript Sort Array of Objects Alphabetically
• Convert Array to Object in JavaScript
• JavaScript Average Function
• Add Object to Array in JavaScript
• Remove Item From Array by Value in JavaScript
• JavaScript Remove Index From Array
• Sum of an Array in JavaScript
• Append Elements in an Array in JavaScript
• JavaScript 2D Array
• JavaScript Declare Empty Array
• Remove Duplicates From an Array in JavaScript
• Randomize or Shuffle an Array in JavaScript
• Store Key-Value Array in JavaScript
• Compare Two Arrays in JavaScript
• JavaScript Get the Last Item in an Array
• Empty an Array in JavaScript

JavaScript Hex

• Convert ASCII to Hexadecimal in JavaScript
• JavaScript Convert ASCII Code to Hex Code

JavaScript Event

• Call Multiple JavaScript Functions in Onclick Event
• Get User Input in JavaScript
• Detect and Handle Tab Key Presses in JavaScript
• Trigger Click Event in JavaScript
• Detect Keyboard Input Event in JavaScript
• Implement an onload Event in iframe in JavaScript
• Window Resize Event in JavaScript

JavaScript Number

• Convert a Number to Binary Format in JavaScript
• Format a Number in JavaScript
• JavaScript Negative Number
• Convert Decimal to Hexadecimal Number in JavaScript
• Format a Number as a Currency String in JavaScript
• Round a Number to 2 Decimal Places in JavaScript
• Generate Random Number in a Specified Range in JavaScript
• JavaScript Add Commas to Number
• Generate a Random Number Between Two Numbers in JavaScript

JavaScript Binary

• Convert a Number to Binary Format in JavaScript

JavaScript CSS

• Change CSS Property Using JavaScript

JavaScript Timer

• Countdown Timer in JavaScript
• JavaScript Count Up Timer
• Timer in JavaScript

JavaScript Redirect

• Redirect to a Webpage in JavaScript

JavaScript Promises

• Decode HTML Entities Using JavaScript
• Wait for Promises to Get Resolved in JavaScript
• Wait for a Function to Finish in JavaScript

JavaScript Decode

• Decode HTML Entities Using JavaScript

JavaScript ComboBox

• Create an Editable ComboBox in JavaScript

JavaScript Async

• Wait for Promises to Get Resolved in JavaScript

JavaScript Chrome

• Create and Run a JavaScript File in Chrome

JavaScript File

• Create and Run a JavaScript File in Chrome
• Write Data to a File in JavaScript
• Instantiate a File Object in JavaScript
• Open Local Text File Using JavaScript
• Read Text File in JavaScript
• Read File Line by Line in JavaScript
• Download a File Using JavaScript
• Get File Name Extensions in JavaScript

JavaScript Obfuscation

• JavaScript Obfuscation - Protects JavaScript Code From Stealing

JavaScript MouseEvent

• Track Mouse Position in JavaScript

JavaScript Mouse Position

• Track Mouse Position in JavaScript

JavaScript Statement

• Specify Multiple Conditions Inside the if Statement in JavaScript

JS image

• Add Onclick Event on HTML Image Tag in JavaScript

HTML onclick

• Add Onclick Event on HTML Image Tag in JavaScript

JavaScript Image

• Crop an Image in JavaScript Using HTML Canvas
• Convert an Image Into Base64 String Using JavaScript
• Rotate an Image With JavaScript
• JavaScript Preload Image
• Change Image Source JavaScript

JavaScript Hashmap

• Hashmap Eqivalent in JavaScript

JavaScript map

• Hashmap Eqivalent in JavaScript

JavaScript Post

• Submit Form With POST Request in JavaScript

JavaScript Encoding

• URL Encoding in JavaScript
• Encode and Decode a String to Base64 in JavaScript

JavaScript Object

• Search Objects From an Array in JavaScript
• Get the Class Name of an Object in JavaScript
• Filter Object Arrays Based on Attributes in JavaScript
• Convert Object to Array in JavaScript
• Convert JSON Object to JavaScript Array
• Sort Array of Objects by Single Key With Date Value
• List Object Properties in JavaScript
• Copy Objects in JavaScript
• Object Inside an Object in JavaScript
• Update Object in JavaScript Array
• Convert Object to String in JavaScript
• Convert JavaScript Object to JSON
• Compare Objects in JavaScript
• Find Index of Object in JavaScript Array
• Array vs Object Declaration in JavaScript
• Check if a Value Is Object in JavaScript
• Append Values to Object in JavaScript
• Merge Objects in Javasript
• Sum of Array of Objects in JavaScript
• Convert Array to Object in JavaScript
• Add Properties to JavaScript Object
• Deep Clone an Object in JavaScript
• Check if Key Exists in Object in JavaScript
• Remove Property From Object in JavaScript
• Filter Object in JavaScript
• Check if Object Is Empty in JavaScript
• Get the Length of Object in JavaScript
• Loop Through a JavaScript Object
• Get Key of a JavaScript Object

JavaScript Onload

• Execute the JavaScript Code After the Webpage Loads

JavaScript Referencing

• Whether JavaScript Is a Pass by Reference or a Pass by Value Type

JavaScript Element

• Get Height of the Div Element in JavaScript
• Get Element by Name in JavaScript

JavaScript Variable

• Access the Session Variable in JavaScript
• Check if a Value Is NaN in JavaScript
• Display a JavaScript Variable in HTML Body
• Use JavaScript Variable in HTML
• Assign a Function to a Variable in JavaScript
• Variable Scope in JavaScript
• Get Type of a Variable in JavaScript
• Check if a Variable Is Undefined in JavaScript
• Check if a Variable Is Not Null in JavaScript
• Declare Global Variables in JavaScript
• Static Variables in JavaScript
• Check if Variable Exists in JavaScript

JavaScript DOM

• Create Table Using JavaScript
• JavaScript Remove Element by Id
• Add Text to Element in JavaScript
• Get the Scrollbar Position With JavaScript
• Get Element by Type in JavaScript
• Get the Position of an Element Using JavaScript
• JavaScript Move Element
• JavaScript Append Data to Div
• JavaScript Hide/Show Elements
• JavaScript DOM Ready
• Enable/Disable Input Button Using JavaScript
• Check if Element Exists in DOM in JavaScript

JavaScript Text

• Copy Text to Clipboard in JavaScript
• Change the Text of a Div Using Javascript
• JavaScript Change Text

JavaScript Console

• Print to Console in JavaScript

JavaScript Debugging

• Print to Console in JavaScript

JavaScript Time

• Implement a Sleep Function in JavaScript
• Get the Timestamp in JavaScript
• Wait for X Seconds in JavaScript

JavaScript String

• Reverse a String in JavaScript

JavaScript Loop

• Terminate a forEach Loop Using Exceptions in JavaScript
• JavaScript For...in VS For...of Loop
• The setInterval Loop in JavaScript
• JavaScript Loop Through an Array
• Nested for Loops JavaScript

JavaScript Set

• Convert Set to Array in JavaScript

JavaScript Input

• Get User Input in JavaScript
• Change Input Value in JavaScript
• Get Input Value in JavaScript

JavaScript Checkbox

• Get the Value of Checked Checkbox in JavaScript
• Display Text When Checkbox Is Checked in JavaScript
• JavaScript Checkbox onChange

JavaScript Function

• JavaScript Call Function From Another JS File
• JavaScript Default Function Parameters
• Return Multiple Values in JavaScript
• Call JavaScript Function From URL
• Call JavaScript Function on Page Load
• Pass JavaScript Function as Parameter
• Assign a Function to a Variable in JavaScript
• Return Values of a Function in JavaScript
• Nested Functions in JavaScript
• Call a JavaScript Function Into an HTML Body
• Exit JavaScript Function

JavaScript Tuple

• JavaScript Tuple Example

JavaScript Iteration

• Use .forEach() to Iterate Over Elements in JavaScript

JavaScript Classname

• Get the Class Name of an Object in JavaScript

JavaScript Return

• Return False in JavaScript
• Return Multiple Values in JavaScript

JavaScript For In

• JavaScript For...in VS For...of Loop

JavaScript For Of

• JavaScript For...in VS For...of Loop

JavaScript Associative Array

• Create Associative Arrays in JavaScript

JavaScript File Object

• Instantiate a File Object in JavaScript

JavaScript Hash Table

• JavaScript Associative Array and Hash Table

JavaScript Button

• JavaScript Change Button Text
• Check Whether a Button Is Clicked by JavaScript
• Toggle a Button in JavaScript

JavaScript Select

• Add Options to Select With JavaScript

JavaScript Options

• Add Options to Select With JavaScript

JavaScript JSON

• Check if a String Is a Valid JSON String in JavaScript
• Get JSON From URL in JavaScript
• Convert JSON Object to JavaScript Array
• Load JSON File in JavaScript
• Convert JavaScript Object to JSON
• Convert JSON to Object in JavaScript
• JavaScript Pretty Print JSON
• Using Array of JSON Objects in JavaScript

JavaScript Map

• Create a Map Function for Objects in JavaScript
• Iterate Through a Map in JavaScript
• Store Key-Value Array in JavaScript

JavaScript Attributes

• Filter Object Arrays Based on Attributes in JavaScript
• Get Values of Data Attributes in JavaScript

JavaScript Form

• Form Action Attribute in JavaScript
• Prevent Form Submission JavaScript
• JavaScript Submit Form on Click
• Submit Form Using JavaScript

JavaScript Keypress

• Detect Arrow Key Presses in JavaScript

JavaScript Class

• Check Whether an Element Contains a Class in JavaScript
• Toggle Class With JavaScript
• JavaScript Add Class to Element

JavaScript Pagination

• Simple Pagination in JavaScript

JavaScript Scroll

• Scroll Automatically to the Bottom of the Page in JavaScript

JavaScript Color

• JavaScript Random Color Generator
• RGB Color Model in JavaScript
• Change the Background Color in JavaScript
• Convert RGB to HEX in JavaScript

JavaScript EventListener

• Check Whether a Button Is Clicked by JavaScript
• Set onClick With JavaScript

JavaScript null

• JavaScript null vs undefined

JavaScript undefined

• JavaScript null vs undefined

JavaScript Method

• Apply vs Call Methods in JavaScript

JavaScript Apply

• Apply vs Call Methods in JavaScript

JavaScript Call

• Apply vs Call Methods in JavaScript

JavaScript Browser

• Edit JavaScript in Browser
• Call JavaScript Function From URL
• JavaScript Detects Mobile Browser

JavaScript Edit

• Edit JavaScript in Browser

JavaScript Math

• Examples to Find Average in JavaScript
• Integer Division in JavaScript
• Exponents in JavaScript
• Generate Random Number in a Specified Range in JavaScript
• Square a Number in JavaScript

JavaScript Radio Button

• Get Selected Radio Button Value in JavaScript

JavaScript VAR

• Difference Between Let and Var in JavaScript

JavaScript LET

• Difference Between Let and Var in JavaScript

JavaScript XPath

• Get Element by XPath Using JavaScript

JavaScript Escape

• Escape Quotes in JavaScript

JavaScript Property

• hasOwnProperty in JavaScript

JavaScript json object

• Rock Paper and Scissors in JavaScript

JavaScript splice

• Splice vs Slice in JavaScript

JavaScript slice

• Splice vs Slice in JavaScript

JavaScript Colon

• Colon in JavaScript

JavaScript Popup

• JavaScript Popup a Div Element in the Center of the Webpage
• Javascript Pop Up a Div Element in the Center of the Webpage

JavaScript Parameter

• Pass JavaScript Function as Parameter

JavaScript Condition

• Inline if Statement in JavaScript
• JavaScript OR Condition in the if Statement

JavaScript Upload

• Upload File in JavaScript With Example

JavaScript Operator

• Double Exclamation Operator Example in JavaScript
• Difference Between i++ and ++i in JavaScript
• Not in Operator in JavaScript
• JavaScript === vs ==
• JavaScript Ternary Conditional Operator
• Modulo Operator(%) in JavaScript

JavaScript Boolean Operator

• Double Exclamation Operator Example in JavaScript

JSON to JavaScript

• Get Value From JSON Object in JavaScript

JavaScript Time Picker

• JavaScript Time Picker Example in HTML

JavaScript Random

• Generate Random Color in JavaScript

JavaScript Enumerator

• Enumerator in JavaScript

JavaScript Encode

• Easy Solution to Encode HTML Entities in JavaScript

JavaScript EventHandler

• Set onClick With JavaScript

JavaScript Window Onload Method

• JavaScript Window Onload Function Call

JavaScript Date

• Change Date Format in JavaScript
• Convert Date to UTC in JavaScript
• Get the Timezone in JavaScript
• Format a JavaScript Date
• Convert Timestamp to Date in JavaScript
• Add Days to Current Date in JavaScript

JavaScript onclick go to URL

• Go to URL With Onclick in JavaScript

JavaScript Arraylist

• Implement Arraylist in JavaScript

JavaScript Regex

• Phone Number RegEx in JavaScript

JavaScript Resize Image

• Resize Image Using HTML Canvas in JavaScript

JavaScript Canvas

• Draw Circle in HTML5 Canvas Using JavaScript

JavaScript Value

• Get Element Value Using JavaScript

JavaScript Attribute

• Get Element by Attribute in JavaScript

JavaScript Constant

• Constants in JavaScript

JavaScript Mouseover

• Mouseover Event in JavaScript

JavaScript PDF

• Convert HTML to PDF in JavaScript

JavaScript Excel

• Export HTML Table to Excel Using JavaScript

JavaScript CSV

• Parse CSV File in JavaScript
• Export Array to CSV in JavaScript

JavaScript Dialog

• Alert Yes No With the confirm() Function in JavaScript

JavaScript Background

• Change the Background Color in JavaScript

JavaScript Boolean

• Compare Objects in JavaScript
• Convert a String to Boolean in JavaScript

JSON Object

• Convert JSON to Object in JavaScript

JavaScript GUID

• JavaScript GUID

JavaScript Mail

• mailto in JavaScript

JavaScript Fibonacci

• JavaScript Fibonacci

JavaScript Char

• Convert Character Code to ASCII Code in JavaScript

JavaScript Enum

• JavaScript Enums

JavaScript Table

• JavaScript Sort HTML Table

JavaScript Integer

• Convert a Float Number to Int in JavaScript
• Convert a String Into a Number in JavaScript

JavaScript Float

• Convert a Float Number to Int in JavaScript

JavaScript POST

• JavaScript POST

JavaScript Format

• Format a Number as a Currency String in JavaScript

JavaScript Audio

• Play Audio Files in JavaScript

JavaScript Algorithm

• Bubble Sort in JavaScript

JavaScript Data Structure

• Simulate a Struct in JavaScript

JavaScript Datetime

• Subtract Dates in JavaScript

JavScript Array

• Flatten an Array in JavaScript

JavaScript Filter

• Filter Object in JavaScript

Java String

• Check if a Variable Is String in JavaScript

Java Array

• Merge Two Arrays Without Any Duplicates in JavaScript