[5.x] Fix helpBlock error with custom js validation rule

[irfandumanx]

I was encountering an error when using the example field while trying to extend rules this way in cp.js.

Statamic.booting(() => {
    Statamic.$config.set('extensionRules',
    [
        {
            label: 'Email Authenticator',
            value: 'email_authenticator:',
            example: 'email_authenticator:form'
        },
    ]);
});

TypeError: Cannot read properties of undefined (reading 'example')
    at q.helpBlock (app-4350e625.js:392:218858)
    at M.get (app-4350e625.js:5:42279)
    at M.evaluate (app-4350e625.js:5:43343)
    at q.helpBlock (app-4350e625.js:5:45757)
    at q.M (app-4350e625.js:392:221720)
    at M._render (app-4350e625.js:5:24987)
    at q.N (app-4350e625.js:5:29723)
    at M.get (app-4350e625.js:5:42279)
    at M.run (app-4350e625.js:5:43050)
    at flushSchedulerQueue (app-4350e625.js:5:32642)

TypeError: Cannot read properties of undefined (reading '$refs')
    at q.<anonymous> (app-4350e625.js:392:219887)
    at Array.<anonymous> (app-4350e625.js:5:39048)
    at flushCallbacks (app-4350e625.js:5:38224)

So i am submitting this PR because I've resolved this issue.

[jasonvarga]

Thank you.

By the way, in your JS you are currently overriding everything. You should be merging the existing ones. Do this instead:

Statamic.booting(() => {
    Statamic.$config.set('extensionRules', [
        ...Statamic.$config.get('extensionRules'),
        {
            label: 'Email Authenticator',
            value: 'email_authenticator:',
            example: 'email_authenticator:form'
        },
    ]);
});

[irfandumanx]

Thank you.

By the way, in your JS you are currently overriding everything. You should be merging the existing ones. Do this instead:

Statamic.booting(() => {
    Statamic.$config.set('extensionRules', [
        ...Statamic.$config.get('extensionRules'),
        {
            label: 'Email Authenticator',
            value: 'email_authenticator:',
            example: 'email_authenticator:form'
        },
    ]);
});

I know, I just wanted to touch on the issue. Thank you.