Lightning/platformResourceLoader doesn't deduplicate identical resource loading
Trailblazer Community

Lightning/platformResourceLoader doesn't deduplicate identical resource loading


Last updated 7 days ago ·Reference W-6115640 ·Reported By 6 users

Fixed - Spring '20

When multiple lightning components use the same 3rd party Javascript libraries, the files from the library were loaded only once, and rest all components reused the loaded files from the 3rd party libraries.
In case of Lightning web components, if multiple components use the same 3rd party libraries, the files are being reloaded as many times as the number of components on the page.
This scenario can be seen when the page loads, and al;so in chrome bowser developer console tool, the network logs show the files of the libraries being reloaded for every component.

Actual results: Files of 3rd party library is put back again and again into the DOM even though the same files are used by multiple components.

Expected results:Files that are being reused needs to be inserted into the DOM only once.

Create an LWC component with below code.



<div class="chart-container">

<div class="pie-chart" lwc:dom="manual">






import { LightningElement } from 'lwc';

import {loadStyle, loadScript} from 'lightning/platformResourceLoader'

import devextreme from '@salesforce/resourceUrl/devextreme';

import { getPicklistValues } from 'lightning/uiObjectInfoApi';

export default class Testjavascript extends LightningElement {

scriptloaded= false;

//@api chartData;

//@api palette;






loadScript(this, devextreme + '/dx.common.css'),

loadScript(this, devextreme + '/dx.greenmist.css'),

loadScript(this, devextreme + '/dx.all.js')

]).then(() =>{







<?xml version="1.0" encoding="UTF-8"?>

<LightningComponentBundle xmlns="">










Is it Fixed?

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