MaxKless

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build: update package-lock.json to node 16

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After updating Node.js to 16.16.0, the package-lock.json is outdated. => Updated Fix #3405

**Executing `npm i` does not work out of the box for windows users!** Deep down in the dependency graph, there's the following package: https://www.npmjs.com/package/iltorb It requires you to compile the...

fix(demo): make sure guide links don't break for main.formly.dev

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**What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)** fix(demo) **What is the current behavior? (You can also link to an open issue here)** Currently,...

Allow demo component tests and update FormlyPresetModule.forTesting

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~DEPENDS ON #3256 !!~ -> merged **What is the current behavior? (You can also link to an open issue here)** Currently, formly provides great test tooling to make writing jest...

feat(core): add showValid configuration extra

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THIS IS A DRAFT PR **What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)** This is a feature to add a centrally configurable `showValid` extra...

Currently, extensions are purely side-effects and have to modify their input object mutably. If you want to update a field config in an immutable way, it's not supported well right...

Formly ESLint rules

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ESLint is a great tool that allows us to write consistent, clean code. Formly as an additional framework in the tech stack is another layer of abstraction and can lead...

[Jest Snapshots](https://jestjs.io/docs/snapshot-testing#snapshot-testing-with-jest) are a powerful tool to make writing jest tests and ttd easier. Especially for `FormlyFieldConfig`s, manually testing different properties is cumbersome and prone to errors / missing stuff...

showValidation extra, analogue to showError

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**Describe the solution you'd like** I'm using formly to build complex forms (and loving it!), including some fields that contain a mixture of standard and asynchronous validation. To precisely control...