9
votes
LWC constructor() error: "Must call super constructor in derived class before accessing 'this' or returning from derived constructor"
Solution
Add super() as the first statement in your constructor:
constructor() {
super(); // this is required
console.log('constructing');
}
Reason
The requirement for a custom element ...
- 3,282
8
votes
Enable Lightning Components "debug mode" for a guest user
You can set the UserPreferencesUserDebugModePref field on the Guest User to enable lightning component debug mode, e.g.
$ sfdx force:data:record:update -s User -i 005... -v "...
- 2,538
8
votes
Facing issue in debugging LWC Javascript with Chrome DevTools
I faced the same issue. For me it appeared after Winters' 23 release. Apparently Salesforce forced Lightning Web Security with this release. (see release notes: https://help.salesforce.com/s/...
- 81
7
votes
Accepted
Facing issue in debugging LWC Javascript with Chrome DevTools
I ran across this issue too and posted more about it here: https://saramorgan.net/2022/10/17/workaround-for-issue-debugging-lwc-in-chrome-dev-tools-after-winter-2023/
- 771
4
votes
Facing issue in debugging LWC Javascript with Chrome DevTools
API version 56.0 (Winter '23) has a different file structure in DevTools and has seems to have a lot of issues like not breaking on the correct line.
Go to: Setup > Security > Session Settings
...
- 41
4
votes
Debug Components in an Org With LWS Enabled - breakpoints not working
Debugging Lightning Web Components (LWC) on orgs with Lightning Web Security (LWS) enabled is working for non-LWR digital experiences, and "CRM"/internal users.
For LWR experiences there is ...
- 2,571
4
votes
Debug Components in an Org With LWS Enabled - breakpoints not working
This behavior is also happening to me.
I just throw a debugger; in the js file and from there you can debug on web.
- 196
3
votes
How to avoid problem with debugging LWC Javascript?
Looks like the only option here is to create a file force-app/main/default/settings/Security.settings-meta.xml with the following body
<?xml version="1.0" encoding="UTF-8"?>
&...
- 18.9k
3
votes
Accepted
In JS of LWC, line after forEach statement does not execute
Looks to me like you are missing "this" references:
.then(result => {
this.apexJobInfoData = result.JobInfo.length===0?null:result.JobInfo;
this.error = undefined;
if(...
- 39.7k
2
votes
LWC [object Object] returns undefined when trying to access property values
JavaScript is case sensitive. In your JSON its mentioned as Id whereas you are printing id.
Change it to Id and it should work.
- 9,261
2
votes
Accepted
Type error in LWC cannot read properties of null - the log is showing the data
From what I can see, it might be possible that in some instances, your ActiveAccount node might be missing a Name property. However, I can't confirm.
As a best practice, you don't want to access ...
- 20.4k
2
votes
How to reset values of a multiselect combo box on click of a button in LWC
The best practice would be to leverage the potential of SLDS-Library(it's what LWC components are made up of) which already offers similar UI functions. All we need is to utilize its rich class-list ...
2
votes
Unexpected token error in If statement in LWC Javascript controller
You don't not have any methods in the JS. The statements like if should be inside the methods.
Read more here: https://javascript.info/class
- 8,143
2
votes
What is the meaning of a>>>0 in javascript? where a is an integer variable holding a value in js
It doesn't shift the number, it just sets the sign bit to 0. It also convert the original value to number.
Keep in mind that output of the bitwise shift operators is a 32-bit number.
It means that if ...
- 10.3k
2
votes
ssjs System.Collections.Generic.Dictionary`2[System.String,System.Object]
You are not getting an error, but rather you're writing out exactly what you've asked for. Your json_el variable contains a C# Dictionary Object and you're told that the variable contains an object. ...
- 8,381
1
vote
data is not showing on UI screen what is error in my program plz ans if any know this what mistake i m doing in this
You have declared searchInput twice in your JavaScript file.
In your @wire service, you're using searchInput: '$searchKey', but searchKey is not defined anywhere in your code. You should use ...
- 3,575
1
vote
Setter is not getting invoked ,Could anyone please help me understand the flow and how to get setter invoked?
First thing first, you don't need custom code for input validation, you should leverage lightning-input attribute max-length:
The maximum number of characters allowed in the field.
Use this attribute ...
- 10.3k
1
vote
Accepted
Salesforce lightning inspector chrome extension not found
The extension is temporarily removed. There was an issue with permissions and a new version is published to resolve it, but it's still under review with Google. It will be back up soon
See this post ...
- 1,095
Only top scored, non community-wiki answers of a minimum length are eligible