Category: LWC

Salesforce LWC Editor in browser

Salesforce made a great move by making the Web Components part of the eco system by introducing Lightning Web Component(LWC). But for some reason, they decided not to provide the ability to code it directly from their developer console. Currently the only way to do it is, is by using the VS Code. This is great, but if you’re in a hurry and want to make some quick changes, it won’t be easy.

To resolve this, I decided to make a quick-to-use LWC editor in my chrome extension Salesforce Advanced Code Searcher.

How to use:

  1. Install the extension by going to : https://chrome.google.com/webstore/detail/salesforce-advanced-code/lnkgcmpjkkkeffambkllliefdpjdklmi
  2. Navigate to your salesforce setup Page. You should see a “Click here to authorize” button. Click on it to authorize the extension.
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3. Once the authorization is complete, Navigate to the LWC Editor tab and you should see all the Components that already exists in the Org. In case there are none then you can start by creating one.

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What can you do?

  1. You can edit the components and save it back.

Look for the extension that you are looking for in the left file explorer, click open the link and that should open the file in a new tab. Make the required changes and hit Ctrl+s (PC) or Cmd +s (Mac) to save the change. In case there are errors it will be displayed in the console log right below the editor.

2. You can add a file in an existing components.

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Right-click on the component where you want to add a file. You will be presented with 2 options : New File & Delete. Click on the New File to open a modal dialog where you can key in the file name (do not add an extension). Click on the Create File button and it will add the file under the component.

3. You can delete the files in the component.

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5. You can also change the theme:

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c3 charts and LWC

I wanted to try out some charting on LWC and I thought what better framework than C3. In this post we will see a component which will display opportunities in various statues associated to an account.

accountCHart

As a prerequisite you would need c3 and d3 (c3 has a dependency on d3.js) framework loaded in static resource for the charting to work .

Download the latest version of the C3 and D3 from below.

C3 -> https://github.com/c3js/c3/releases/latest

D3 -> https://github.com/d3/d3/releases/download/v5.9.7/d3.zip

Couple of important points for charting:

  1. Load the dependency in the same order that I mentioned below. D3 first and then follow it up with C3.
  2. We have added the a parameter t and assigned the current time to it.
    This is done to make sure the cache is refreshed every time the scripts are loaded.
    If we do not do this then there is an issues if we add multiple charts in a single component.


<template>
<!–Render the chart only when the opportunity data is available.–>
<template if:true={opportunityData}>
<!–We need not have another component for chart,
I thought it would be a better idea seperate out the charting component
for better readability–>
<c-opportunity-pie-chart chart-data={opportunityData}></c-opportunity-pie-chart>
</template>
</template>

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opportunityChartContainer.html

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import { LightningElement,api,wire,track } from 'lwc';
import opportunityAggregation from '@salesforce/apex/OpportunityDataService.aggregateOpportunities'
export default class OpportunityChartContainer extends LightningElement {
@api recordId; //As the component is loaded on a account detail page, we will get access to the account Id.
@track opportunityData=[];//Chart accepts data in multiple formats, array, object etc. We are using array here.
//get the data from the backend
@wire(opportunityAggregation,{accountId : '$recordId'}) opptyData({error, data}){
if(data){
let oppData = Object.assign({},data);
/*
this.opportunityData will in the below format
[['Closed Won',2],['Closed Lost',4],['Negotiation',5]];
*/
for(let key in oppData){
if(oppData.hasOwnProperty(key)){
let tempData=[key, oppData[key]];
this.opportunityData.push(tempData);
}
}
}
if(error)
console.log(error);
}
}

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opportunityChartContainer.js

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<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata" fqn="opportunityChartContainer">
<apiVersion>46.0</apiVersion>
<isExposed>true</isExposed>
<targets>
<target>lightning__RecordPage</target>
<target>lightning__AppPage</target>
<target>lightning__HomePage</target>
</targets>
</LightningComponentBundle>

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opportunityChartContainer.js-meta.xml

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public with sharing class OpportunityDataService {
@AuraEnabled(cacheable=true)
public static Map<String, Integer> aggregateOpportunities(String accountId){
Map<String, Integer> opportunityStatusMap = new Map<String, Integer>();
//Aggregate the opportunities.
for(AggregateResult aggr : [SELECT Count(Id), StageName
FROM Opportunity
WHERE AccountId=:accountId
GROUP BY StageName]) {
opportunityStatusMap.put((String)(aggr.get('StageName')), (Integer)(aggr.get('expr0')));
}
return opportunityStatusMap;
}
}

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OpportunityDataService.cls

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<template>
<lightning-card title="Opportunities">
<!–C3 manipulates the dom and in order for it to do so we need to add the lwc:dom attribute–>
<div lwc:dom="manual" class="c3"></div>
</lightning-card>
</template>

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opportunityPieChart.html

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import { LightningElement, api,track } from 'lwc';
import { loadStyle, loadScript } from 'lightning/platformResourceLoader';
import C3 from '@salesforce/resourceUrl/c3';//load the c3 and d3 from the static resources.
import D3 from '@salesforce/resourceUrl/d3';
export default class OpportunityPieChart extends LightningElement {
@api chartData;
@track chart;
@track loadingInitialized=false;
librariesLoaded = false;
//This is used called when the DOM is rendered.
renderedCallback() {
if(this.librariesLoaded)
this.drawChart();
//this.librariesLoaded = true;
if(!this.loadingInitialized) {
this.loadingInitialized = true;
/*
We have added the a parameter t and assigned the current time to it.
This is done to make sure the cache is refrehed everytime the scripts are loaded.
If we do not do this then there is an issues if we add multiple charts in a single component.
*/
Promise.all([
loadScript(this, D3 + '/d3.min.js?t='+new Date().getTime()),
loadScript(this, C3 + '/c3-0.7.4/c3.min.js?t='+new Date().getTime()),
loadStyle(this, C3 + '/c3-0.7.4/c3.min.css?t='+new Date().getTime()),
])
.then(() => {
this.librariesLoaded = true;
//Call the charting method when all the dependent javascript libraries are loaded.
this.drawChart();
})
.catch(error => {
console.log('The error ', error);
});
}
}
drawChart() {
this.chart = c3.generate({
bindto: this.template.querySelector('div.c3'),//Select the div to which the chart will be bound to.
data: {
columns: this.chartData,
type : 'donut'
},
donut : {
title : 'Opportunities',
label: {
format: function(value, ratio, id) {
return value;
}
}
}
});
}
//destroy the chart once the elemnt is destroyed
disconnectedCallback() {
this.chart.destroy();
}
}

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opportunityPieChart.js

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This is just a simple example for one to start with C3. Please share the beautiful charts that you build. Enjoy Charting!!!