Merge pull request #5965 from karczk/issue-5957

Fix for #5957: Bug on resolving default props (HTMLAllCollection)

src/addons/link/ReactLink.js

@@ -55,7 +55,7 @@ function ReactLink(value, requestChange) {
  */
 function createLinkTypeChecker(linkType) {
   var shapes = {
-    value: typeof linkType === 'undefined' ?
+    value: linkType === undefined ?
       React.PropTypes.any.isRequired :
       linkType.isRequired,
     requestChange: React.PropTypes.func.isRequired,

src/isomorphic/classic/class/ReactClass.js

@@ -777,7 +777,7 @@ var ReactClass = {
       var initialState = this.getInitialState ? this.getInitialState() : null;
       if (__DEV__) {
         // We allow auto-mocks to proceed as if they're returning null.
-        if (typeof initialState === 'undefined' &&
+        if (initialState === undefined &&
             this.getInitialState._isMockFunction) {
           // This is probably bad practice. Consider warning here and
           // deprecating this convenience.

src/isomorphic/classic/element/ReactElement.js

@@ -153,7 +153,7 @@ ReactElement.createElement = function(type, config, children) {
   if (type && type.defaultProps) {
     var defaultProps = type.defaultProps;
     for (propName in defaultProps) {
-      if (typeof props[propName] === 'undefined') {
+      if (props[propName] === undefined) {
         props[propName] = defaultProps[propName];
       }
     }

src/renderers/dom/client/ReactDOMSelection.js

@@ -138,7 +138,7 @@ function setIEOffsets(node, offsets) {
   var range = document.selection.createRange().duplicate();
   var start, end;
 
-  if (typeof offsets.end === 'undefined') {
+  if (offsets.end === undefined) {
     start = offsets.start;
     end = start;
   } else if (offsets.start > offsets.end) {
@@ -176,7 +176,7 @@ function setModernOffsets(node, offsets) {
   var selection = window.getSelection();
   var length = node[getTextContentAccessor()].length;
   var start = Math.min(offsets.start, length);
-  var end = typeof offsets.end === 'undefined' ?
+  var end = offsets.end === undefined ?
             start : Math.min(offsets.end, length);
 
   // IE 11 uses modern selection, but doesn't support the extend method.

src/renderers/dom/client/ReactInputSelection.js

@@ -114,7 +114,7 @@ var ReactInputSelection = {
   setSelection: function(input, offsets) {
     var start = offsets.start;
     var end = offsets.end;
-    if (typeof end === 'undefined') {
+    if (end === undefined) {
       end = start;
     }
 

src/renderers/shared/reconciler/ReactCompositeComponent.js

@@ -188,7 +188,7 @@ var ReactCompositeComponentMixin = {
         Component.displayName || Component.name || 'Component';
 
       warning(
-        typeof inst.props === 'undefined' || !propsMutated,
+        inst.props === undefined || !propsMutated,
         '%s(...): When calling super() in `%s`, make sure to pass ' +
         'up the same props that your component\'s constructor was passed.',
         componentName, componentName
@@ -673,7 +673,7 @@ var ReactCompositeComponentMixin = {
 
     if (__DEV__) {
       warning(
-        typeof shouldUpdate !== 'undefined',
+        shouldUpdate !== undefined,
         '%s.shouldComponentUpdate(): Returned undefined instead of a ' +
         'boolean value. Make sure to return true or false.',
         this.getName() || 'ReactCompositeComponent'
@@ -839,7 +839,7 @@ var ReactCompositeComponentMixin = {
     var renderedComponent = inst.render();
     if (__DEV__) {
       // We allow auto-mocks to proceed as if they're returning null.
-      if (typeof renderedComponent === 'undefined' &&
+      if (renderedComponent === undefined &&
           inst.render._isMockFunction) {
         // This is probably bad practice. Consider warning here and
         // deprecating this convenience.