How to check if a property exists in a JavaScript object
Learn methods for searching an object and its prototype for the existence of properties.
Tag: Javascript
Recent Post
Check if a key exists in localStorage
To check for an item, get the value of the item by querying localStorage by its key.
How to save and retrieve images from localStorage
You can use the FileReader API to create a data URL and pass this through localStorage.
How to create and decode a query string in JavaScript
A query string is used to store string data as part of a URL.
How to wait until a page has loaded in JavaScript
Learn about event that allow you to run code upon the completion of page loading states.
Insert an element or HTML block before or after an existing element
Using the insertAdjacentElement() or insertAdjacentHTML() methods.
Get user location by IP address with JavaScript
Location by IP can resolved by a third-party service or in Node.js.
Typewriter typing effect with JavaScript
Make text appear on screen as if it is being typed live using the setInterval() function!
How to read and display a PDF using JavaScript
The native FileReader API can be used to read a PDF and create a URL to its contents.
What’s wrong with using ‘var’ in JavaScript?
Using 'var' to declare variables can lead to scope leakage and silent errors in your code.
