Function getTargetInstForInputEventIE

docs/lib/react.js:1117–1134

(topLevelType, targetInst)

// For IE8 and IE9.
function getTargetInstForInputEventIE(topLevelType, targetInst) {
  if (topLevelType === topLevelTypes.topSelectionChange || topLevelType === topLevelTypes.topKeyUp || topLevelType === topLevelTypes.topKeyDown) {
    // On the selectionchange event, the target is just document which isn't
    // helpful for us so just check activeElement instead.
    //
    // 99% of the time, keydown and keyup aren't necessary. IE8 fails to fire
    // propertychange on the first input event after setting `value` from a
    // script and fires only keydown, keypress, keyup. Catching keyup usually
    // gets it and catching keydown lets us fire an event for the first
    // keystroke if user does a key repeat (it'll be a little delayed: right
    // before the second keystroke). Other input methods (e.g., paste) seem to
    // fire selectionchange normally.
    if (activeElement && activeElement.value !== activeElementValue) {
      activeElementValue = activeElement.value;
      return activeElementInst;
    }
  }
}

/**
 * SECTION: handle `click` event