On Input

Ensure it is predictable what happens when entering data. If the focus is automatically moved upon input, this must be indicated in advance. Avoid this behavior for input fields and checkboxes, among others. Unexpected actions can particularly confuse users with visual or cognitive impairments.

Impact#

Users with visual or cognitive impairments may be confused by unexpected actions.

Check#

“Are there any unexpected actions while entering data?”

This can be tested without assistive technologies.

Solution#

Check input behavior#

private val textWatcher = object : TextWatcher {
  override fun afterTextChanged(s: Editable?) {
    // Ignored
  }

  override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
    // Ignored
  }

  override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
    // Do not change context
  }
}