Search

Nalezeno "Javascript": 832

JavaScript Glossary: String startsWith()

27.3.2019
Basics The startsWith method takes a string parameter and checks if the calling string starts with the value provided. It returns a Boolean value, true

JavaScript Glossary: String toLowerCase()

26.3.2019
Basics The toLowerCase() String method converts a string object to lower case. The return value of the method is the value of the calling string in lower case

JavaScript Glossary: String length

26.3.2019
Basics The length property of the String object returns the number of code points in a string object. It indicates the length of the string

An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods

26.3.2019
Map, reduce, and filter are three very useful array methods in JavaScript that give developers a ton of power in a short amount of space. Let’s jump right into how you can leverage (and remember how to use!) these super handy methods. Array.map() Array.map() updates each individual value in...

Understanding Event Emitters

26.3.2019
Consider, a DOM Event: const button = document.querySelector("button"); button.addEventListener("click", (event) => /* do something with the event */) We added a listener to a button click. We’ve subscribed to an event being emitted and we fire a callback when it does. Every time we click that...

Build a Decentralized Web Chat in 15 Minutes

25.3.2019
In this 15 minute tutorial we’re going to build a simple decentralized chat application which runs entirely in a web browser. All you will need is a text editor, a web browser, and a basic knowledge of how to save HTML files and open them in the browser. We’re going...

JavaScript Glossary: String trim()

25.3.2019
Basics This method removes whitespaces from the start and end of the calling string. It removes spaces, tabs, no break spaces etc. It returns a new string stripped of whitespaces from both

JavaScript Glossary: String indexOf()

25.3.2019
Basics This method checks for the first appearance of a provided string argument within the calling string and returns the index. It returns -1 if the string argument can’t be

Using <details> for Menus and Dialogs is an Interesting Idea

21.3.2019
One of the most empowering things you can learn as a new front-end developer who is starting to learn JavaScript is to change classes. If you can change classes, you can use your CSS skills to control a lot on a page. Toggle a class to one thing, style it this way, toggle to another class...

Adding Search to Your Site with JavaScript

20.3.2019
Static website generators like Gatsby and Jekyll are popular because they allow the creation of complex, templated pages that can be hosted anywhere. But the awesome simplicity of website generators is also limiting. Search is particularly hard. How do you allow users to search when you have...

JavaScript Glossary: String includes()

19.3.2019
Basics The includes method checks a provided string against the calling String object, it returns true if the calling String object contains the provided string a

Smooth Scrolling for Screencasts

13.3.2019
Let's say you wanted to scroll a web page from top to bottom programmatically. For example, you're recording a screencast and want a nice full-page scroll. You probably can't scroll it yourself because it'll be all uneven and jerky. Native JavaScript can do smooth scrolling. Here's a tiny snippet...

Get Started with Node: An Introduction to APIs, HTTP and ES6+ JavaScript

11.3.2019
Jamie Corkhill has written this wonderful post about Node and I think it’s perhaps one of the best technical articles I’ve ever read. Not only is it jam-packed with information for folks like me who aren't writing JavaScript everyday, it is also incredibly deliberate as Jamie slowly walks through...

Nahoru
Tento web používá k poskytování služeb a analýze návštěvnosti soubory cookie. Používáním tohoto webu s tímto souhlasíte. Další informace