react/jsx-handler-names: cannot opt-out of handler prefix independent of prop prefix

Issue

I only want to enforce eventHandlerPropPrefix, but I cannot selectively opt out of eventHandlerPrefix.

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1. Rule always plugs in a default value ‘handle’ into eventHandlerPrefix when supplied value is an empty string '' (falsy)

Problematic code:

// will always be set to 'handle' when falsy
const eventHandlerPrefix = configuration.eventHandlerPrefix || 'handle';

source

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2. Rule prevents “whitelist” JS regex workarounds noted in #1687 because a capital letter must succeed the allowed prefix.

Example Config: I want to whitelist submit select verbatim and handle* prefix:

"react/jsx-handler-names": ['error', {
  "eventHandlerPrefix": '(handle|submit|select)',
  "eventHandlerPropPrefix": 'on',
}],

Problematic code:

// [A-Z] succeeding eventHandlerPrefix prevents handler whitelist
const EVENT_HANDLER_REGEX = new RegExp(`^((props\\.${eventHandlerPropPrefix})|((.*\\.)?${eventHandlerPrefix}))[A-Z].*$`);

source

[drewlustro]

Awesome; will see if I can give it a shot in the coming week.

[ljharb]

Thanks. Adding support for false - in either config option, but not both - seems like a great PR.