Few months back, I wrote an article on how pub sub model can be used to communicate between Lightning Web Components. In that blog post, we used external library to pass event from child to Lightning Web Components.
Lightning Message Service
In Winter 20, Salesforce released Lightning Message Service which can be used to exchange data between Visualforce, Aura Component and Lightning Web Components. Unlike previous process, we don’t need to import any external library like pub or sub.
In this blog post, I would be creating Visualforce, Aura Component and Lightning Message Service and exchanging message between all of them using Lightning Message Service.
If you enjoy watching video then you might enjoy below video where I conducted Live coding explaining basics of Lightning Web Component.
In this post, we are going to Show loading image on initial load of LWC. In background we would be calling Apex class to take decision if loading image should be hided or redirect user to some other page.
If you were the users of IGoogle, few years back, you would be excited to know that web development is progressing in that direction. Architect of web application development is getting shifted towards component based development by introducing concepts like Web Components and frameworks like polymer and Lightning Components. One of the possible use case of component driven development is ability to use whole component externally. In IGoogle, components were built by partners and then was exposed as widgets to be used on your custom Google home page. Salesforce product team, being visionary came up something like this by introducing Lightning Out. With the help of Lightning Out, we can surface our existing Lightning Component to external websites. Previously, we already discussed that how Lightning components can be used on Visualforce pages using Lightning Out.
Total – Either Number Or API Name of field. Used to derive percentage of Progress Bar
Actual – Either Number Or API Name of field. Used to derive percentage of Progress Bar. If Object contains percentage type of field, then Total can be blank and this field can only contain API name of field of type percentage
As you might already know that next big change in Salesforce is introduction to lightning components. As technology is changing rapidly and to take advantage of cutting edge innovations in web technology, Salesforce doesn’t want to stay behind. If we see trend, all major platform has introduced component based design like Polymer, React, Web Components, Angular 2.
We will be discussing basics of Lightning components in this post and how Lightning application, component, controller, helpers and Apex controllers are connected with each other.