JavaScript Use Cases

How to add class to element in JavaScript

Last updated Feb 26, 2024

How to add item to array in JavaScript

Last updated Dec 16, 2017

How to add item to localstorage in JavaScript

Last updated Dec 19, 2017

How to add item to sessionstorage in JavaScript

Last updated Dec 21, 2017

How to add multiple classes to element in JavaScript

Last updated Sep 22, 2018

How to add object to localstorage in JavaScript

Last updated Dec 19, 2017

How to append html in JavaScript

Last updated Jul 28, 2018

How to apply function to every array element in JavaScript

Last updated Dec 19, 2017

How to async await in JavaScript

Last updated Feb 28, 2024

How to async await fetch in JavaScript

Last updated Feb 13, 2024

How to call a function in JavaScript

Last updated Dec 17, 2017

How to call a function with arguments in JavaScript

Last updated Dec 18, 2017

How to capitalize first letter in JavaScript

Last updated Dec 26, 2018

How to change CSS property in JavaScript

Last updated Mar 11, 2018

How to check if array includes element in JavaScript

Last updated Dec 16, 2017

How to check if element has class in JavaScript

Last updated Feb 26, 2024

How to check if number is even in JavaScript

Last updated Dec 23, 2017

How to check if number is odd in JavaScript

Last updated Dec 23, 2017

How to check if object includes substring in JavaScript

Last updated Jan 28, 2018

How to check if object includes value in JavaScript

Last updated Feb 26, 2024

How to check if object is empty in JavaScript

Last updated Feb 27, 2024

How to check if string ends with substring in JavaScript

Last updated Feb 01, 2018

How to check if string includes another string in JavaScript

Last updated Dec 16, 2017

How to check if string starts with substring in JavaScript

Last updated Feb 01, 2018

How to check if variable is a string in JavaScript

Last updated Apr 28, 2018

How to check if variable is an object in JavaScript

Last updated Dec 17, 2017

How to clear interval in JavaScript

Last updated Jan 28, 2019

How to clear timeout in JavaScript

Last updated Jan 28, 2019

How to comment in JavaScript

Last updated Dec 24, 2017

How to concatenate arrays in JavaScript

Last updated Dec 24, 2017

How to concatenate objects in JavaScript

Last updated Feb 16, 2018

How to convert array to comma separated string in JavaScript

Last updated Dec 18, 2017

How to convert date to mysql format YYYY MM DD in JavaScript

Last updated Dec 01, 2019

How to convert date to timestamp in JavaScript

Last updated Dec 26, 2017

How to convert from degree to radian in JavaScript

Last updated Dec 21, 2017

How to convert JSON to string in JavaScript

Last updated Mar 06, 2018

How to convert string to number in JavaScript

Last updated Nov 11, 2017

How to copy text to clipboard in JavaScript

Last updated Feb 19, 2018

How to create a promise in JavaScript

Last updated Feb 28, 2024

How to create a range array in JavaScript

Last updated Feb 27, 2024

How to create a regex in JavaScript

Last updated Nov 11, 2017

How to create a switch statement in JavaScript

Last updated Dec 24, 2017

How to create an object in JavaScript

Last updated Nov 11, 2017

How to create array from existing array in JavaScript

Last updated Dec 21, 2017

How to create date in RFC3339 format in JavaScript

Last updated Feb 26, 2024

How to create logical AND condition in JavaScript

Last updated Jan 02, 2018

How to create logical NOT condition in JavaScript

Last updated Jan 02, 2018

How to create logical OR condition in JavaScript

Last updated Jan 02, 2018

How to create object from array in JavaScript

Last updated Feb 18, 2020

How to create shallow copy of object in JavaScript

Last updated Aug 14, 2018

How to create string from character code in JavaScript

Last updated Dec 23, 2017

How to decode url in JavaScript

Last updated Dec 18, 2017

How to decrement a variable in JavaScript

Last updated Feb 27, 2024

How to define a class in JavaScript

Last updated Dec 18, 2017

How to define a function with default parameter in JavaScript

Last updated Dec 18, 2017

How to define variable in JavaScript

Last updated Feb 27, 2024

How to delete item from array in JavaScript

Last updated Dec 23, 2017

How to destructure from array in JavaScript

Last updated Dec 16, 2017

How to destructure from object in JavaScript

Last updated Dec 16, 2017

How to destructure with default value in JavaScript

Last updated Dec 23, 2017

How to empty array in JavaScript

Last updated Dec 16, 2017

How to encode url in JavaScript

Last updated Dec 18, 2017

How to fetch json in JavaScript

Last updated Feb 13, 2024

How to fetch post json in JavaScript

Last updated Feb 13, 2024

How to fetch XML in JavaScript

Last updated Feb 26, 2024

How to filter objects in array in JavaScript

Last updated Dec 18, 2017

How to find an element from the DOM in JavaScript

Last updated Mar 11, 2018

How to find element by class in JavaScript

Last updated Mar 11, 2018

How to find element by id in JavaScript

Last updated Mar 11, 2018

How to find index of element in array in JavaScript

Last updated Mar 29, 2018

How to find multiple DOM elements in JavaScript

Last updated Mar 11, 2018

How to find next element in JavaScript

Last updated Feb 26, 2024

How to find previous element in JavaScript

Last updated Mar 11, 2018

How to find root of positive number in JavaScript

Last updated Dec 26, 2017

How to flatten a nested array in JavaScript

Last updated Feb 21, 2018

How to format currency as per locale in JavaScript

Last updated Mar 04, 2018

How to format date in JavaScript

Last updated Aug 16, 2020

How to generate random string in JavaScript

Last updated Mar 12, 2018

How to get count of character in string in JavaScript

Last updated Feb 16, 2018

How to get count of DOM elements in JavaScript

Last updated Mar 09, 2018

How to get count of duplicate items in array in JavaScript

Last updated Jan 08, 2018

How to get CSS custom property in JavaScript

Last updated Mar 12, 2018

How to get CSS property in JavaScript

Last updated Jul 29, 2018

How to get current day name in JavaScript

Last updated Dec 29, 2017

How to get current month name in JavaScript

Last updated Dec 29, 2017

How to get current page url in JavaScript

Last updated Dec 16, 2017

How to get current short day name in JavaScript

Last updated Jan 04, 2018

How to get current short month name in JavaScript

Last updated Jan 04, 2018

How to get current timestamp in JavaScript

Last updated Dec 26, 2017

How to get current timestamp in seconds in JavaScript

Last updated Dec 26, 2017

How to get current year in JavaScript

Last updated Jan 04, 2018

How to get data attribute from element in JavaScript

Last updated Jul 28, 2018

How to get division remainder in JavaScript

Last updated Mar 08, 2018

How to get extension from input type file in JavaScript

Last updated Dec 26, 2018

How to get file name from path in JavaScript

Last updated Dec 26, 2018

How to get first character of string in JavaScript

Last updated Dec 26, 2018

How to get function arguments as array in JavaScript

Last updated Dec 19, 2017

How to get human friendly date difference in JavaScript

Last updated Feb 27, 2024

How to get item from localstorage in JavaScript

Last updated Dec 19, 2017

How to get item from sessionstorage in JavaScript

Last updated Dec 21, 2017

How to get keys of object in JavaScript

Last updated Dec 16, 2017

How to get last array element in JavaScript

Last updated Feb 28, 2024

How to get last character of string in JavaScript

Last updated Aug 18, 2022

How to get length of array in JavaScript

Last updated Dec 29, 2017

How to get length of string in JavaScript

Last updated Dec 29, 2017

How to get minutes ago in JavaScript

Last updated Feb 27, 2024

How to get path from full path in JavaScript

Last updated Dec 26, 2018

How to get port from url in JavaScript

Last updated Apr 28, 2018

How to get random element from array in JavaScript

Last updated Aug 18, 2022

How to get random hex color in JavaScript

Last updated Feb 18, 2020

How to get random number between two numbers in JavaScript

Last updated Jan 08, 2018

How to get unique values from object array property in JavaScript

Last updated Mar 06, 2018

How to get url search params in JavaScript

Last updated Mar 04, 2018

How to hide element in JavaScript

Last updated Mar 11, 2018

How to increment a variable in JavaScript

Last updated Feb 27, 2024

How to interpolate in JavaScript

Last updated Feb 26, 2024

How to listen to click event in JavaScript

Last updated Nov 11, 2017

How to listen to hover event in JavaScript

Last updated Feb 26, 2024

How to listen to scroll event in JavaScript

Last updated Nov 05, 2018

How to loop backwards through array in JavaScript

Last updated Dec 18, 2017

How to loop through array in JavaScript

Last updated Feb 22, 2020

How to loop through object in JavaScript

Last updated Nov 11, 2017

How to lowercase a string in JavaScript

Last updated Nov 11, 2017

How to manually trigger event on element in JavaScript

Last updated Mar 11, 2018

How to match text against regex in JavaScript

Last updated Nov 11, 2017

How to open url in new tab in JavaScript

Last updated Apr 28, 2018

How to parse JSON string in JavaScript

Last updated Jan 11, 2018

How to pause audio in JavaScript

Last updated Mar 12, 2018

How to pause video in JavaScript

Last updated Mar 12, 2018

How to play audio in JavaScript

Last updated Mar 12, 2018

How to play video in JavaScript

Last updated Mar 12, 2018

How to prevent default action of event in JavaScript

Last updated Dec 16, 2017

How to redirect to another page in JavaScript

Last updated Dec 16, 2017

How to register a service worker in JavaScript

Last updated Mar 12, 2018

How to reload page in JavaScript

Last updated Nov 11, 2017

How to remove a property from object in JavaScript

Last updated Dec 16, 2017

How to remove class from element in JavaScript

Last updated Mar 11, 2018

How to remove duplicates from array in JavaScript

Last updated Mar 06, 2018

How to remove element from DOM in JavaScript

Last updated Mar 10, 2018

How to remove item from localstorage in JavaScript

Last updated Dec 19, 2017

How to remove multiple classes from element in JavaScript

Last updated Sep 22, 2018

How to repeat a string in JavaScript

Last updated Aug 16, 2020

How to replace a class of element in JavaScript

Last updated Mar 11, 2018

How to replace all occurrences of string in JavaScript

Last updated Dec 16, 2017

How to replace element content HTML in JavaScript

Last updated Mar 11, 2018

How to replace spaces with dashes in JavaScript

Last updated Dec 16, 2017

How to reverse elements of array in JavaScript

Last updated Dec 19, 2017

How to round a number in JavaScript

Last updated Feb 18, 2020

How to set CSS custom property in JavaScript

Last updated Mar 12, 2018

How to set interval in JavaScript

Last updated Nov 05, 2018

How to set timeout in JavaScript

Last updated Nov 05, 2018

How to set url search params in JavaScript

Last updated Mar 04, 2018

How to show element in JavaScript

Last updated Mar 11, 2018

How to skip values from array destructuring in JavaScript

Last updated Dec 16, 2018

How to smooth scroll in JavaScript

Last updated Apr 28, 2018

How to sort array in ascending order in JavaScript

Last updated Dec 23, 2017

How to sort array in descending order in JavaScript

Last updated Dec 23, 2017

How to sort array of objects in ascending order in JavaScript

Last updated Aug 16, 2020

How to sort array of objects in descending order in JavaScript

Last updated Aug 16, 2020

How to split comma separated string in JavaScript

Last updated Dec 24, 2017

How to split string into array of characters in JavaScript

Last updated Dec 16, 2017

How to stop audio in JavaScript

Last updated Feb 26, 2024

How to stop video in JavaScript

Last updated Feb 26, 2024

How to sum items of array in JavaScript

Last updated Jan 23, 2018

How to swap variables in JavaScript

Last updated Feb 27, 2024

How to time a function in JavaScript

Last updated Mar 14, 2018

How to toggle class of element in JavaScript

Last updated Sep 22, 2018

How to try catch in JavaScript

Last updated Apr 28, 2018

How to update array immutably in JavaScript

Last updated Feb 28, 2024

How to uppercase a string in JavaScript

Last updated Nov 11, 2017

How to uppercase every word in JavaScript

Last updated Dec 26, 2018

How to uppercase first letter in JavaScript

Last updated Dec 26, 2018

How to validate email in JavaScript

Last updated Dec 16, 2017

How to wait in async await functions in JavaScript

Last updated Apr 11, 2019

How to write a multiline string in JavaScript

Last updated Feb 26, 2024

How to write an arrow function in JavaScript

Last updated Aug 16, 2020