Salesforce Lightning

Lightning Web Component using lightning-record-form.

Akhil KulkarniLeave a comment

<lightning-record-form  />.

To Create, Edit and View a record “Quickly” you can use “<lightning-record-form />”  tag. Salesforce automatically Loads all fields in the object’s compact or full layout, or only the fields you specify. There is no manual custom field tag that user need to add and customize the layout. Salesforce handles everything for you including the lookup fields.

Overall if you are looking for a quick solution to create a record instantly, you can go with <lightning-record-form />.  

Every tag comes with some attributes. For this tag there are few important attributes that are usually used.

  1. object-api-name
  2. fields
  3. record-id
  4. layout-type 
  5. mode
  6. record-type-id

There are few more…

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Governor Limits · Salesforce Lightning

Introduction to Lightning Web Component and Basic Applications for LWC

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As I mentioned in my previous blog(Introduction to Lightning Aura Component), Salesforce supports 2 different programming modules.

  1. Lightning Aura Component (LAC)
  2. Lightning Web Component (LWC)

Since LWC is a big topic we will cover just introductory part in this blog. So the question is –

What is Lightning Web Component (LWC)?

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Metadata · Schema

Get field’s lable, API name, isCustom in APEX

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When working in apex, sometimes you need field’s label name and API name and other details. Below is a sample code which can be used to fetch details of any object’s field, its Label, its Name(API Name), and an attribute to check if it’s a custom field or no. There are other options too which can be referred as per business requirement.

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Salesforce Lightning

SVG in Lightning Bundle

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SVG stands for “Scalable Vector Graphics”. SVG defines vector-based graphics in XML format. Every element and every attribute in SVG files can be animated. SVG resource in lightning bundle can be used to define custom icons for your component. Here we are speaking about the icons and not logo. Icon and logo can look similar just like my blog’s icon and logo. But both are different. SVG deals with icons. By default if you see any component in salesforce, you can observe that default icon is undefined.

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Salesforce Lightning

Design in Lightning Bundle

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In design section you can control which attributes are exposed to builder tools like the Lightning App Builder, Experience Builder, or Flow Builder. A design resource lives in the same folder as yours .cmp resource, and describes the design-time behavior of the Aura component—information that visual tools need to display the component in a page or app.

<design:component label="Hello World">
    <design:attribute name="subject" label="Subject" description="Name of the person you want to greet" />
    <design:attribute name="greeting" label="Greeting" />
</design:component>
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Salesforce Lightning

Renderer in Lightning Bundle

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Renderer in Client-side is to override default rendering for a component. You can consider what data should render on load or on reload. The framework’s rendering service takes in-memory component state and creates and manages the DOM elements owned by the component. If you want to modify DOM elements created by the framework for a component, you can modify the DOM elements in the component’s renderer. Otherwise, the framework will override your changes when the component is rerendered.

The base component in the framework is aura:component. Every component extends this base component.

This renderer has base implementations for the four phases of the rendering and rerendering cycles:

  • render()
  • rerender()
  • afterRender()
  • unrender()
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Salesforce Lightning

Style in Lightning Bundle

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Sometimes there will be scenario where you need to define specific set of style to the tags that are used in component. This is similar to how style tags are defined in normal HTML pages or Visualforce pages. Only difference is style name definition will start with .THIS keyword. You can also define specific style tags for other devices like, mobile or tablet etc using @media.

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Salesforce Lightning

Helper in Lightning Bundle

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Helper in lightning bundle is similar to controller where you write client-side javascript methods. These methods are more like reuseable methods which can be called from any controller method.

  • Helper is similar to controller but helper does not handle events.
  • Helper can be used to write reusable Javascript methods and these can be called from Controller section.
  • Helper functions also enable specialization of tasks, such as processing data and queueing server-side actions.
  • Helper methods are local to Component bundle.
  • Helper methods can be called from any controller javascript methods.
  • Declaring a helper method is similar to controller javascript method.
  • A helper function can pass in any arguments required by the function, such as the component it belongs to, a callback, or any other objects.
  • You can call a helper method from another helper method using this. operation.
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Salesforce Lightning

Controller in Lightning Bundle

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Controller handle client-side events in lightning bundle. It’s a JavaScript resource that defines the functions for all of the component’s actions. A client-side controller is a JavaScript object in object-literal notation containing a map of name-value pairs. Function can represent an action event. Client-side controllers are surrounded by parentheses and curly braces. Separate action handlers with commas.

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