refactor: remove null comparisons

packages/runtime-core/src/componentRenderUtils.ts

@@ -90,7 +90,7 @@ export function renderComponentRoot(
         result = cloneVNode(result, fallthroughAttrs)
         // If the child root node is a compiler optimized vnode, make sure it
         // force update full props to account for the merged attrs.
-        if (result.dynamicChildren !== null) {
+        if (result.dynamicChildren) {
           result.patchFlag |= PatchFlags.FULL_PROPS
         }
       } else if (__DEV__ && !accessedAttrs && result.type !== Comment) {
@@ -109,7 +109,7 @@ export function renderComponentRoot(
       result = cloneVNode(result, { [parentScopeId]: '' })
     }
     // inherit directives
-    if (vnode.dirs != null) {
+    if (vnode.dirs) {
       if (__DEV__ && !isElementRoot(result)) {
         warn(
           `Runtime directive used on component with non-element root node. ` +
@@ -119,7 +119,7 @@ export function renderComponentRoot(
       result.dirs = vnode.dirs
     }
     // inherit transition data
-    if (vnode.transition != null) {
+    if (vnode.transition) {
       if (__DEV__ && !isElementRoot(result)) {
         warn(
           `Component inside <Transition> renders non-element root node ` +
@@ -185,7 +185,7 @@ export function shouldUpdateComponent(
   }
 
   // force child update on runtime directive usage on component vnode.
-  if (nextVNode.dirs != null) {
+  if (nextVNode.dirs) {
     return true
   }
 
@@ -218,18 +218,18 @@ export function shouldUpdateComponent(
   } else if (!optimized) {
     // this path is only taken by manually written render functions
     // so presence of any children leads to a forced update
-    if (prevChildren != null || nextChildren != null) {
-      if (nextChildren == null || !(nextChildren as any).$stable) {
+    if (prevChildren || nextChildren) {
+      if (!nextChildren || !(nextChildren as any).$stable) {
         return true
       }
     }
     if (prevProps === nextProps) {
       return false
     }
-    if (prevProps === null) {
-      return nextProps !== null
+    if (!prevProps) {
+      return !!nextProps
     }
-    if (nextProps === null) {
+    if (!nextProps) {
       return true
     }
     return hasPropsChanged(prevProps, nextProps)