Recently in one of my projects I had a requirement to override the standard New button functionality with custom LWC component to accommodate some business logic.

After searching for the solution online, I came to know that:

1. It is currently not possible to use LWC directly to override the Standard New button. Instead, we have to use an Aura component as a wrapper, and then call the LWC from within the Aura component.

2. Even if we use this approach, the custom component will open in a new tab instead of a modal, which — albeit working perfectly fine — does not result in a good user experience. As shown below:

Figure 1: Result after overriding Standard New button with LWC wrapped inside Aura

So, I started doing some throwaway prototyping and eventually came up with the solution that I have shared below.

Figure 2: My custom solution with LWC Modal

I'm sharing a link to the detailed article here. Please have a look at this and let me know if you have found any other workaround for this issue.