Clear methods to work with custom components

[AmirTugi]

• Fixes #53.
• Assuming custom components will use components from react-select - Change the clearFirst and clearAll methods to work with the specific class names (${classNamePrefix}__multi-value_remove and ${classNamePrefix}__clear-indicator).
• Add tests to support the custom components clear.

Important! this PR is blocked until we get answer/solution about those specific classes being added only if the user defined classNamePrefix prop (here).

[ebonow]

Greetings all,

I appreciate the work being done to support react-select and providing better testing tools. I wanted to stop by here to provide more clarification in regards to the ask, the issues, and a proposed solution.

First, @AmirTugi made a request for react-select to provide a default `classNamePrefix. This is not something that the react-select team feels is in the best interest of all of its users, especially those who choose not to pollute their DOM with extra class name attributes for the sake of providing DOM attribute selectors.

I believe this request was made with a misunderstanding of how the classNames and styles for react-select are generated. I have attempted to clarify this in the thread, but long story short, that bit is left to Emotion as the underlying CSS-in-JS solution. It should also be noted that those elements which return a className ending in the name of the related component are done via a label api which is fairly easy to implement.

I think it would be beneficial to have "labels" provided for the interactive components (dropdownIndicator, clearIndicator, multiValueClear) and wouldn't add any extra new classes to the DOM (just simply appending defined string names to the end).

This would produce something to the effect of:

<div aria-hidden="true" class="css-tlfecz-indicatorContainer">
  <svg height="20" width="20" viewBox="0 0 20 20" aria-hidden="true" focusable="false" class="css-6q0nyr-Svg-dropdownIndicator">
    <path d="M4.516 7.548c0.436-0.446 1.043-0.481 1.576 0l3.908 3.747 3.908-3.747c0.533-0.481 1.141-0.446 1.574 0 0.436 0.445 0.408 1.197 0 1.615-0.406 0.418-4.695 4.502-4.695 4.502-0.217 0.223-0.502 0.335-0.787 0.335s-0.57-0.112-0.789-0.335c0 0-4.287-4.084-4.695-4.502s-0.436-1.17 0-1.615z"></path>
  </svg>
</div>

With a className of css-6q0nyr-Svg-dropdownIndicator, this would allow you to target the DOM:

const dropdownIndicator = selectEl.querySelector('class*=dropdownIndicator')

If this is a viable solution, we can have this considered as an addition to an already existing PR https://github.com/JedWatson/react-select/pull/4342 which is being considered for next release.

[romgain]

Hi @ebonow , this sounds great! Thank you very much for looking into this!

[th3fallen]

@AmirTugi could you try testing your custom components on version 5.4.0 of this, I'm curious if my update to how the container is found will resolve this too.