Web Components and Types it’s Includes in LWC : jayakrishnasfdc

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November 29, 2020
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Web Components and Types it’s Includes in LWC
by: jayakrishnasfdc
blow post content copied from  Jayakrishna Ganjikunta
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First of all lets understand what is Web component and advantages over custom component in Aura.

Web component: is a custom html templates which has ability to import html elements and work in shadow DOM and native web standards .

Problems of custom component model:

  • lack of native reusable components
  • lack of style isolation
  • lack of native templating in HTML
  • lack of a way of packaging css, javascript and html together (as a component)
  • lack of custom elements

Web components are built using 4 technologies:

  • Templates
  • Custom Elements
  • Shadow DOM
  • HTML 5 Imports
  1. Templates

Up until now, we have used unorthodox and unsafe ways to implement client side templates in HTML, like the common <script type=”text/html”>, <script type=”text/mytype“> or hidden elements.

HTML templates are:

•insert, the markup within a template tag is not rendered nor is evaluated by the browser,

•hidden for selectors, the markup within a template is not part of the DOM and thus is hidden from selectors. The only way to access the contents within a template are the template APIs, •they can be placed anywhere within a page

2. Custom Elements

By providing the ability to create custom elements, the custom element standard allows you to define markup with the appropriate semantics for your application.

Advantages:

•Increases the readability of your application ( and thus speed of development and maintainability)

•Improves SEO

•Improves accessibility

3. Shadow DOM

Shadow DOM refers to the ability of the browser to include a subtree of DOM elements into the rendering of a document, but not into the main document DOM tree.

4. HTML 5 Imports: we can import elements from Html Libraries.

Check Full LWC Course ==> Click here

Thanks
Jayakrishna

Facebook Page: Jayakrishna sfdc Blog – https://www.facebook.com/groups/615517438930811/

Twitter: https://twitter.com/jayakrishnadoc

Blog/website:  https://jayakrishnasfdc.wordpress.com


November 29, 2020 at 02:44PM
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