vault backup: 2022-06-28 16:44:23

React 的深入探索/React 的流程解析 - Fiber 递归/React 的深入探索 - beginWork.md

@@ -163,6 +163,39 @@ switch 中的 case 逻辑太多了，全部都写出来会让笔记显得特别
 
 首先会执行 pushHostRootContext 函数，这个函数与 context  有关
 
+**pushHostRootContext**
+
+```javascript
+function pushHostRootContext(workInProgress) {
+	var root = workInProgress.stateNode;
+	if (root.pendingContext) {
+		pushTopLevelContextObject(
+			workInProgress,
+			root.pendingContext,
+			root.pendingContext !== root.context
+		);
+	} else if (root.context) {
+		// Should always be set
+		pushTopLevelContextObject(workInProgress, root.context, false);
+	}
+
+	pushHostContainer(workInProgress, root.containerInfo);
+}
+```
+
+```javascript
+function pushTopLevelContextObject(fiber, context, didChange) {
+	{
+		if (contextStackCursor.current !== emptyContextObject) {
+			throw new Error("...");
+		}
+		
+		push(contextStackCursor, context, fiber);
+		push(didPerformWorkStackCursor, didChange, fiber);
+	}
+}
+```
+
 ```javascript
 function updateHostRoot(current, workInProgress, renderLanes) {
 	pushHostRootContext(workInProgress);