Use parts to allow customizing styles

[maloua]

I would like to be able to control the styling of web components better, so that they are more in line with the rest of the design when necessary. For example: I'm using the gmpx-place-picker in a bigger form, and there's currently no way to change the input border.

A solution would be to use the part selector to target inner element when necessary.

An alternative would be to use more variables and less hardcoded values in the css and overwrite them. But I'm afraid that will either not be sufficiently detailed enough or bloat the code too much.

[wangela]

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@maloua Thank you for opening this issue. 🙏
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[awmack]

Hey! Thanks for raising this. As you mention, we could make more aspects of the styling customizable with CSS variables, but this could end up reinventing the wheel. Exposing CSS ::part() could be a good approach for targeted elements like the input which are unlikely to change as part of the internal implementation.

[harisvsulaiman]

@awmack as @maloua Mentioned there is currently no way to style the border, the easiest solution would be to expose CSS variables until a more robust styling API is in place.

[dorsma]

Being able to style the input border, font style, and text color are necessary for a clean and consistent UI integration. For the input box, it's important also to be able to style the :focus pseudo elements as well.