PDII Exam Dumps | A developer created a Lightning web component that uses a Lightning-record-edit-form to collect information

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Question 23/138

A developer created a Lightning web component that uses a Lightning-record-edit-form to collect information about Leads. Users complain that they only see one error message at a time when they save a Lead record.
Which best practice should the developer use to perform the validations, and allow more than one error message to be displayed simultaneously?

A. Process Builder

B. Client-side validation

C. Apex REST

D. Custom validation rules

Correct Answer: B

Recent Comments (The most recent comments are at the top.)

Igris - Jun 24, 2025

Why Client-side Validation is correct:
You can validate multiple fields at once before submission
You can call setCustomValidity() and reportValidity() on multiple components
This allows all errors to be shown at once, improving the user experience.

Ayoub - Apr 09, 2025

It's B, not D!!! Salesforce recommends custom validation rules (D), but they only show one error at a time in lightning-record-edit-form. To show multiple errors at once like the users are asking in the question, B (Client-side validation) is the best choice

simon - Jan 22, 2023

We recommend using custom validation rules to verify data input instead of implementing client-side validation errors. A validation rule can contain a formula or expression that evaluates the data in one or more fields. You can include an error message to display on an invalid field. See Validation Rules in Salesforce Help for more information.

Ben - Jan 10, 2023

Custom validation rules will only allow for one error at a time - I think B is correct

Bobby Lee - Dec 29, 2022

Looks like D.

Fermín - Nov 22, 2022

I think so, It should be D.

Scero - Sep 07, 2022

D?
https://developer.salesforce.com/docs/component-library/bundle/lightning-record-edit-form/documentation

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