Chet  Lubowitz

Chet Lubowitz


How To Extend A Native HTML Element

Ever since the days of XML we have tried to extend HTML with our own tags.

The standard library of HTML tags is fairly limited and intentionally consists of low-level building blocks, meant to be composed by developers into more high-level functionality.

Now that all modern browsers support Web Components (or more specifically Custom Elements) you can create your very own HTML elements that you can use anywhere by just loading a script and adding the tag to the document.

It’s really as simple as that.

If you have created your own image gallery, you can use it by just loading the script and adding <image-gallery></image-gallery> to the document:

class ImageGallery extends HTMLElement {
  constructor() {
customElements.define('image-gallery', ImageGallery);
<image-gallery></image-gallery>  // presto!

Here the ImageGallery class contains all the functionality for the <image-gallery> HTML element and we register it throughcustomElements.define with the 'image-gallery' tag name.

Now frameworks like React, Angular and Vue.js also allow you to create your own HTML tags, but contrary to framework components, Custom Elements are real first-class HTML elements.

In this case the ImageGallery class extends HTMLElement, which is the base interface of all HTML elements. This means that it will inherit all the functionality that is common to all HTML elements.

For example, you can attach event listeners to it through addEventListener, use CSS to style it through its style property or interact with it in the browser devtools like any other HTML element.

And it doesn’t stop there.

Standing On The Shoulders Of Giants

Instead of extending HTMLElement, Custom Elements can also extend other built-in HTML elements like <button><img> and <a> for example.

Let’s say we want to create a lazy loading image that will not load until it’s scrolled into the viewport. We could do this by searching for all images in the page and attach a IntersectionObserver to each image that makes sure the image will only load when it becomes visible.

But we could also extend the built-in image element itself and use that enhanced image element instead of the regular <img> HTML element.

We can do this by creating a Custom Element that doesn’t extend HTMLElement but instead extends the interface of the <img> element, which is HTMLImageElement:

class LazyImg extends HTMLImageElement {
  constructor() {
customElements.define('lazy-img', LazyImg, {extends: 'img'});

The Custom Element is registered with the usual call to customElement.define but now it takes a third argument, {extends: 'img'}, that specifies which HTML element will be extended.

Now instead of using a new HTML tag, we can just use our enhanced image element with the regular <img> tag but we add the new functionality to it through the is attribute:

<img is="lazy-img" src="/path/to/image.png">

This image is now an enhanced image that gets all the functionality we defined in the LazyImg class.

The complete implementation of _LazyImg_ is too large for this article but you can find the source code on my Github.

The beauty of this approach is that any browser that doesn’t support extending built-in HTML elements will simply ignore the is attribute and just render a regular image.

Progressive enhancement at its finest.

#web-development #front-end-development #programming #javascript #software-development

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How To Extend A Native HTML Element
Autumn  Blick

Autumn Blick


How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

Ava Watson

Ava Watson


Know Everything About HTML With HTML Experts

HTML stands for a hypertext markup language. For the designs to be displayed in web browser HTML is the markup language. Technologies like Cascading style sheets (CSS) and scripting languages such as JavaScript assist HTML. With the help of HTML websites and the web, designs are created. Html has a wide range of academic applications. HTML has a series of elements. HTML helps to display web content. Its elements tell the web how to display the contents.

The document component of HTML is known as an HTML element. HTML element helps in displaying the web pages. An HTML document is a mixture of text nodes and HTML elements.

Basics of HTML are-

The simple fundamental components oh HTML is

  1. Head- the setup information for the program and web pages is carried in the head
  2. Body- the actual substance that is to be shown on the web page is carried in the body
  3. HTML- information starts and ends with and labels.
  4. Comments- come up in between

Html versions timeline

  1. HTML was created in 1990. Html is a program that is updated regularly. the timeline for the HTML versions is
  2. HTML 2- November, 1995
  3. HTML 3- January, 1997
  4. HTML 4- December, 1997; April, 1998; December, 1999; May, 2000
  5. HTML 5- October, 2014; November, 2016; December, 2017

HTML draft version timelines are

  1. October 1991
  2. June 1992
  3. November 1992
  4. June 1993
  5. November 1993
  6. November 1994
  7. April 1995
  8. January 2008
  9. HTML 5-
    2011, last call
    2012 candidate recommendation
    2014 proposed recommendation and recommendation

HTML helps in creating web pages. In web pages, there are texts, pictures, colouring schemes, tables, and a variety of other things. HTML allows all these on a web page.
There are a lot of attributes in HTML. It may get difficult to memorize these attributes. HTML is a tricky concept. Sometimes it gets difficult to find a single mistake that doesn’t let the web page function properly.

Many minor things are to be kept in mind in HTML. To complete an HTML assignment, it is always advisable to seek help from online experts. These experts are well trained and acknowledged with the subject. They provide quality content within the prescribed deadline. With several positive reviews, the online expert help for HTML assignment is highly recommended.

#html assignment help #html assignment writing help #online html assignment writing help #html assignment help service online #what is html #about html

Alisha  Larkin

Alisha Larkin


HTML Tutorial For Beginners

The prospect of learning HTML can seem confusing at first: where to begin, what to learn, the best ways to learn — it can be difficult to get started. In this article, we’ll explore the best ways for learning HTML to assist you on your programming journey.

What is HTML?

Hypertext Markup Language (HTML) is the standard markup language for documents meant to be displayed in a web browser. Along with Cascading Style Sheets (CSS) and JavaScript, HTML completes the trio of essential tools used in creating modern web documents.

HTML provides the structure of a webpage, from the header and footer sections to paragraphs of text, videos, and images. CSS allows you to set the visual properties of different HTML elements, like changing colors, setting the order of blocks on the screen, and defining which elements to display. JavaScript automates changes to HTML and CSS, for example, making the font larger in a paragraph when a user clicks a button on the page.

#html #html-css #html-fundamentals #learning-html #html-css-basics #html-templates

ashika eliza


HTML - A Complete Guide to Master the Top Programming Language

In this era of technology, anything digital holds a prime significance in our day-to-day life. Hence, developers have submerged themselves to create a major impact using programming languages.According to Statista, HTML/CSS holds the second position (the first being Javascript), in the list of most widely-used programming languages globally (2020).Interested to learn this language? Then head on to this tutorial and get to know all about HTML! Plus we have added numerous examples such that you can learn better! So happy learning!
html for beginners

#html #html-for-beginners #html-tutorials #introduction-to-html #learn-html #tutorials-html

Types, Effects and Attributes

HTML Button Tag – Types, Effects and Attributes

In this article, we are going to learn HTML Button Tags. So let’s start!!!

HTML Button

HTML Button


#html tutorials #html button #html button attributes #html button element #html button tags #html