57 lines
2 KiB
Markdown
57 lines
2 KiB
Markdown
# Form Fundaments
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`Form control`s are the most fundamental building block of the Forms. They are the basis of
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both `field`s and `fieldset`s, and the `form` itself.
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## Fields
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Fields are the actual form controls the end user interacts with.
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They extend the `Field`(), which on its turn uses the `FormControlMixin`.
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Fields provide a normalized, predictable API for platform components and custom made form controls.
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On top of this, they feature:
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- data synchronization with models
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- formatting of view values
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- advanced validation possibilities
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- creation of advanced user interaction scenarios via `interaction states`
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- provision of labels and help texts in an easy, declarative manner
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- better focus management
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- accessibility out of the box
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- advanced styling possibilities: map your own Design System to the internal HTML structure
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### Platform fields (wrappers)
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- [`LionInput`](../../input/), a wrapper for `<input>`
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- [`LionTextarea`](../../textarea/), a wrapper for `<textarea>`
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- [`LionSelect`](../../select/), a wrapper for `<select>`
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- [`LionRadio`](../../radio/), a wrapper for `<input type="radio">`
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- [`LionCheckbox`](../../checkbox/), a wrapper for `<input type="checkbox">`
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### Custom fields (wrappers)
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Whenever a native form control doesn't exist or is not sufficient, a custom form control should
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be created. One could think of components like:
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- slider
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- combobox
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- autocomplete
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- etc...
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## Fieldsets
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Fieldsets are groups of fields. They can be considered fields on their own as well, since they
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partly share the normalized api via `FormControlMixin`.
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Fieldsets are the basis for:
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- [`LionFieldset`](../../fieldset/)
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- [`LionForm`](../../form/)
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- [`LionRadioGroup`](../../radio-group/)
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- [`LionCheckboxGroup`](../../checkbox-group/)
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## Other Resources
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- [Model Value](./modelValue.md)
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- [Formatting and parsing](./FormattingAndParsing.md)
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- [Interaction states](./InteractionStates.md)
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- [Validation System](../../validate/docs/ValidationSystem.md)
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- [FieldCustomMixin](./FieldCustomMixin.md)
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