Javascript Code for Lightning Web Component Upload File

Lightning Web Components (LWC)Tutorial

Lightning Web Components-Why, What & Where to start from?

Why Lightning Spider web Components(LWC)?

AURA framework which was used for current Lightning Components was based on standards of 2014 but are outdated at present and information technology was time for modify because for the following reasons:

• Rendering could exist optimized.
• Standard UI elements were scarce.
• Lacked modern constructs.
• Was non fit for modular apps.
• Web standards were updated.
• Aureola Framework became skill and had its own learning bend.

Additionally, Lightning Web Components(LWC) can coexist and interoperate with Aureola components.

What Lightning Web Components(LWC)?

LWC is a new programming model levering the recent web standards. Rather than being a totally custom and development wise rigid framework, It'due south quite flexible. It's mostly the mutual Spider web Standards and a Sparse Layer of Specialized services to make it a perfect fit for Modern Rich UI Implementations in Salesforce. This thin layer of specialized services contain Base Lightning Components, Lightning Data Service and User Interface API which work backside the curtain for LWC.

A thin layer of specialized services on elevation of a standard web stack results in:

• Ease of development for large scale modular apps.
• Ease of Leveraging the latest web functionalities and constructs.
• A mutual model and transferable skills.
  (Any spider web developer working on modernistic JS frameworks could easily ramp-upwardly LWC).
• Interoperable components.
• Ameliorate performance.

So, the new development stack looks like:

Where to first from?

Hither are some recommended steps:

1. Larn more about LWC from the LWC Video Gallery .
2. Install VS Code and set it up for Salesforce Development.
   You can utilise ForceCode Extension for Salesforce every bit it supports LWC Or y'all tin can follow this trailhead module.
3. Get piece of cake to understand sample code for most all utilize cases hither .
4. For more than samples visit hither .
5. Develop a LWC yourself and try your code by running information technology here .
6. Well-nigh importantly, Complete the Get Started with LWC trailmix .

Lightning Web Components-Component Structure

How is a Lightning Spider web Component(LWC) formed?

Similar to an AURA component, the main contents of a LWC are as well html, javascript. There are optional content like css. Just and then in addition to these for LWC, an xml configuration file is also included which defines the metadata values for the component.
So, a LWC component would look like:

At present, lets cover a brief overview of these files one by one:

HTML

• Has a root tag <template> which contains your component'south HTML.
• When renders, the <template> tag is replaced with <namespace-component-name>.

Javascript

• Import functionality declared in a module eg-lwc(the core module), use the import argument.
• To allow other code to apply functionality in a module, use the export statement.
• LightningElement is custom wrapper of the standard HTML element and we extend it in the component and consign.

Configuration

XML file that defines the metadata configuration values for the component eg-

• Components Label
• Availability
• Configuration Attributes
• Builder Attributes

CSS

• To fashion a component.
• The style sheet is applied automatically.

So, the files that we have discussed how would the component build with these look?

Component UI

Summary

This is the best time to acquire and start early on with Lightning Web Components, which offering the latest spider web standards, delivers unprecedented functioning and productivity and interoperate seamlessly with existing code.

Case of Lightning Spider web Components(LWC)

Here is listing of some of Lightning Web Component example for developers:

Get Record Id in Lightning Web Component

lightning-record-view-course

Telephone call Apex Methods In Lightning web components

Lightning Web Component lightning-datatable

Use Lightning Web Components in Visualforce

Modal/Popup Lightning Web Component(LWC)

Custom Labels In Lightning Spider web Component(LWC)

Lightning Web Component(LWC) Toast Messages

Lightning Spinner in LWC (Lightning Web Component)

lightning-record-edit-grade LWC(Lightning Web Component)

lightning-tape-grade LWC

template if:true Conditional Rendering LWC

for:each template directives in LWC

Navigation Service in LWC(Lightning Web Components)

Wrapper Grade in LWC(Lightning Spider web Component)

Use Static Resource In LWC(Lightning Web Component)

Decorators in Lightning Web Component(LWC)

File Upload in Lightning Web Component(lwc)

lightning-card LWC

wire Service LWC Lightning Web Component

Skilful luck. Happy Coding 🙂

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Source: https://www.sfdcpoint.com/salesforce/lightning-web-components-lwc/

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