vault backup: 2022-05-08 17:03:09

React 的源码深入/React 的流程解析 - Fiber 递归/React 的流程解析 - Fiber 递归.md

@@ -10,7 +10,24 @@ Fiber 递归开始首先会交由 createWorkInProgress 函数生成 WorkInProgre
 
 ```javascript
 function createWorkInProgress(current, pendingProps) {
+	if (workInProgress === null) {
+		workInProgress = createFiber(
+			current.tag,
+			pendingProps,
+			current.key,
+			current.mode
+		);
+		// 赋值同名属性
+		workInProgress.elementType = current.elementType;
+	    workInProgress.type = current.type;
+	    workInProgress.stateNode = current.stateNode;
+
+		// 通过 alternate 属性互相链接
+		workInProgress.alternate = current;
+	    current.alternate = workInProgress;
+	}
 
+	......
 }
 ```