Remove IE8-specific ChangeEventPlugin logic

Fix with prettier

Author: Brandon Dail

src/renderers/dom/shared/eventPlugins/ChangeEventPlugin.js

@@ -71,13 +71,6 @@ function shouldUseChangeEvent(elem) {
     (nodeName === 'input' && elem.type === 'file');
 }
 
-var doesChangeEventBubble = false;
-if (ExecutionEnvironment.canUseDOM) {
-  // See `handleChange` comment below
-  doesChangeEventBubble = isEventSupported('change') &&
-    (!document.documentMode || document.documentMode > 8);
-}
-
 function manualDispatchChangeEvent(nativeEvent) {
   var event = createAndAccumulateChangeEvent(
     activeElementInst,
@@ -104,21 +97,6 @@ function runEventInBatch(event) {
   EventPluginHub.processEventQueue(false);
 }
 
-function startWatchingForChangeEventIE8(target, targetInst) {
-  activeElement = target;
-  activeElementInst = targetInst;
-  activeElement.attachEvent('onchange', manualDispatchChangeEvent);
-}
-
-function stopWatchingForChangeEventIE8() {
-  if (!activeElement) {
-    return;
-  }
-  activeElement.detachEvent('onchange', manualDispatchChangeEvent);
-  activeElement = null;
-  activeElementInst = null;
-}
-
 function getInstIfValueChanged(targetInst) {
   if (inputValueTracking.updateValueIfChanged(targetInst)) {
     return targetInst;
@@ -131,17 +109,6 @@ function getTargetInstForChangeEvent(topLevelType, targetInst) {
   }
 }
 
-function handleEventsForChangeEventIE8(topLevelType, target, targetInst) {
-  if (topLevelType === 'topFocus') {
-    // stopWatching() should be a noop here but we call it just in case we
-    // missed a blur event somehow.
-    stopWatchingForChangeEventIE8();
-    startWatchingForChangeEventIE8(target, targetInst);
-  } else if (topLevelType === 'topBlur') {
-    stopWatchingForChangeEventIE8();
-  }
-}
-
 /**
  * SECTION: handle `input` event
  */
@@ -192,9 +159,6 @@ function handlePropertyChange(nativeEvent) {
 
 function handleEventsForInputEventPolyfill(topLevelType, target, targetInst) {
   if (topLevelType === 'topFocus') {
-    // In IE8, we can capture almost all .value changes by adding a
-    // propertychange handler and looking for events with propertyName
-    // equal to 'value'
     // In IE9, propertychange fires for most input events but is buggy and
     // doesn't fire when text is deleted, but conveniently, selectionchange
     // appears to fire in all of the remaining cases so we catch those and
@@ -305,11 +269,7 @@ var ChangeEventPlugin = {
 
     var getTargetInstFunc, handleEventFunc;
     if (shouldUseChangeEvent(targetNode)) {
-      if (doesChangeEventBubble) {
-        getTargetInstFunc = getTargetInstForChangeEvent;
-      } else {
-        handleEventFunc = handleEventsForChangeEventIE8;
-      }
+      getTargetInstFunc = getTargetInstForChangeEvent;
     } else if (isTextInputElement(targetNode)) {
       if (isInputEventSupported) {
         getTargetInstFunc = getTargetInstForInputOrChangeEvent;