fallback when Object.defineProperty is not available

webpack · Feb 22, 2016 · 59c0c4a · 59c0c4a
1 parent d4573e5
commit 59c0c4a
Showing 1 changed file with 46 additions and 36 deletions.
diff --git a/lib/HotModuleReplacement.runtime.js b/lib/HotModuleReplacement.runtime.js
@@ -29,47 +29,57 @@ module.exports = function() {
 		};
 		for(var name in $require$) {
 			if(Object.prototype.hasOwnProperty.call($require$, name)) {
-				Object.defineProperty(fn, name, (function(name) {
-					return {
-						configurable: true,
-						enumerable: true,
-						get: function() {
-							return $require$[name];
-						},
-						set: function(value) {
-							$require$[name] = value;
-						}
-					};
-				}(name)));
+				if(Object.defineProperty) {
+					Object.defineProperty(fn, name, (function(name) {
+						return {
+							configurable: true,
+							enumerable: true,
+							get: function() {
+								return $require$[name];
+							},
+							set: function(value) {
+								$require$[name] = value;
+							}
+						};
+					}(name)));
+				} else {
+					fn[name] = $require$[name];
+				}
 			}
 		}
-		Object.defineProperty(fn, "e", {
-			enumerable: true,
-			value: function(chunkId, callback) {
-				if(hotStatus === "ready")
-					hotSetStatus("prepare");
-				hotChunksLoading++;
-				$require$.e(chunkId, function() {
-					try {
-						callback.call(null, fn);
-					} finally {
-						finishChunkLoading();
-					}
 
-					function finishChunkLoading() {
-						hotChunksLoading--;
-						if(hotStatus === "prepare") {
-							if(!hotWaitingFilesMap[chunkId]) {
-								hotEnsureUpdateChunk(chunkId);
-							}
-							if(hotChunksLoading === 0 && hotWaitingFiles === 0) {
-								hotUpdateDownloaded();
-							}
+		function ensure(chunkId, callback) {
+			if(hotStatus === "ready")
+				hotSetStatus("prepare");
+			hotChunksLoading++;
+			$require$.e(chunkId, function() {
+				try {
+					callback.call(null, fn);
+				} finally {
+					finishChunkLoading();
+				}
+
+				function finishChunkLoading() {
+					hotChunksLoading--;
+					if(hotStatus === "prepare") {
+						if(!hotWaitingFilesMap[chunkId]) {
+							hotEnsureUpdateChunk(chunkId);
+						}
+						if(hotChunksLoading === 0 && hotWaitingFiles === 0) {
+							hotUpdateDownloaded();
 						}
 					}
-				});
-			}
-		});
+				}
+			});
+		}
+		if(Object.defineProperty) {
+			Object.defineProperty(fn, "e", {
+				enumerable: true,
+				value: ensure
+			});
+		} else {
+			fn.e = ensure;
+		}
 		return fn;
 	}