allow triggering of 'search' event when clearing the input field

[ggcaponetto]

current behaviour

If the user initializes the library with the following options
const townsSelect= new Choices('#towns', { searchFloor: 0 })
and then clears the input field using the backspace, no search event is triggered.

expected behaviour

search event is triggered with empty string value

proposed fix

at line 933 of https://github.com/jshjohnson/Choices/blob/master/src/scripts/choices.js
change
... if (value && value.length >= searchFloor) {...} ...
to
... if (value !== null && typeof value !=="undefined" && value.length >= searchFloor) {...} ...

[RecuencoJones]

Logic in _onKeyUp handler should be tweaked as well to call _handleSearch with empty value.

https://github.com/jshjohnson/Choices/blob/master/src/scripts/choices.js#L1207

[bupy7]

Fast and hard fix:

townsSelect.input.addEventListener('keyup', function () {
    console.log(this.value);
});

[alfonsoar]

@tinovyatkin @jshjohnson is this something you guys have on your radar? are you accepting PRs?

[PredragPeranovic]

I'm using this hard coded workaround for choices.js 9.0.1 for now.

townSelect.input.element.addEventListener('keyup', (event) => {
        if ((event.which === 8 || event.which === 46) && event.target.value === '' && townSelect.config.searchFloor === 0) {
          // Trigger search event
          var resultCount = townSelect.config.searchChoices ? townSelect._searchChoices(event.target.value) : 0 

          townSelect.passedElement.triggerEvent('search', {
            value: event.target.value,
            resultCount: resultCount
          })
        }
      })