* fix(combobox): don't use setAttribute for disabled/enabled attributes
How to reproduce this bug:
1. Go to https://lion.js.org/components/combobox/overview/ or just use the combobox in your application.
2. Inspect the combobox in the browser. Click on the `<lion-combobox>` element at the DOM inspector.
3. At the JavaScript console, print `$0.disabled`. Observe it is currently `false`, and the user can interact with it normally.
4. (optional) Run `$0.disabled =true`. Observe the user cannot interact with it anymore. That's expected.
5. Run `$0.disabled = false`.
BUG: The user cannot interact with the combobox anymore, despite `disabled` being false.
Root cause: If you inspect the `<input>` element, you can see it has `disabled="false"`.
The [specs](https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#enabling-and-disabling-form-controls:-the-disabled-attribute) say:
> The `disabled` content attribute is a [boolean attribute](https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#boolean-attribute).
>
> A form control is **disabled** if any of the following are true:
> * the element is a `button`, `input`, `select`, `textarea`, or form-associated custom element, and the `disabled` attribute is specified on this element (regardless of its value);
And [also](https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#boolean-attribute):
> A number of attributes are **boolean attributes**. The presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value.
Thanks to @thematho for finding the root cause.
* fix(combobox): add support for disabled and readonly states with corresponding tests
* Update packages/ui/components/combobox/src/LionCombobox.js
Co-authored-by: Thijs Louisse <t_louisse@hotmail.com>
* Update packages/ui/components/combobox/src/LionCombobox.js
Co-authored-by: Thijs Louisse <t_louisse@hotmail.com>
* Update packages/ui/components/combobox/src/LionCombobox.js
Co-authored-by: Thijs Louisse <t_louisse@hotmail.com>
* fix(combobox): added accessibility tests
---------
Co-authored-by: Denilson Sá Maia <denilsonsa@gmail.com>
Co-authored-by: Thijs Louisse <t_louisse@hotmail.com>
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