refactor: remove optional chaining

packages/compiler-core/src/parser.ts

@@ -179,7 +179,7 @@ const tokenizer = new Tokenizer(stack, {
     const name = currentOpenTag!.tag
     currentOpenTag!.isSelfClosing = true
     endOpenTag(end)
-    if (stack[0]?.tag === name) {
+    if (stack[0] && stack[0].tag === name) {
       onCloseTag(stack.shift()!, end)
     }
   },
@@ -587,14 +587,14 @@ function endOpenTag(end: number) {
 
 function onText(content: string, start: number, end: number) {
   if (__BROWSER__) {
-    const tag = stack[0]?.tag
+    const tag = stack[0] && stack[0].tag
     if (tag !== 'script' && tag !== 'style' && content.includes('&')) {
       content = currentOptions.decodeEntities!(content, false)
     }
   }
   const parent = stack[0] || currentRoot
   const lastNode = parent.children[parent.children.length - 1]
-  if (lastNode?.type === NodeTypes.TEXT) {
+  if (lastNode && lastNode.type === NodeTypes.TEXT) {
     // merge
     lastNode.content += content
     setLocEnd(lastNode.loc, end)
@@ -771,7 +771,8 @@ function isComponent({ tag, props }: ElementNode): boolean {
     tag === 'component' ||
     isUpperCase(tag.charCodeAt(0)) ||
     isCoreComponent(tag) ||
-    currentOptions.isBuiltInComponent?.(tag) ||
+    (currentOptions.isBuiltInComponent &&
+      currentOptions.isBuiltInComponent(tag)) ||
     (currentOptions.isNativeTag && !currentOptions.isNativeTag(tag))
   ) {
     return true
@@ -828,8 +829,8 @@ function condenseWhitespace(
     if (node.type === NodeTypes.TEXT) {
       if (!inPre) {
         if (isAllWhitespace(node.content)) {
-          const prev = nodes[i - 1]?.type
-          const next = nodes[i + 1]?.type
+          const prev = nodes[i - 1] && nodes[i - 1].type
+          const next = nodes[i + 1] && nodes[i + 1].type
           // Remove if:
           // - the whitespace is the first or last node, or:
           // - (condense mode) the whitespace is between two comments, or:
@@ -1063,7 +1064,7 @@ export function baseParse(input: string, options?: ParserOptions): RootNode {
     currentOptions.ns === Namespaces.SVG ||
     currentOptions.ns === Namespaces.MATH_ML
 
-  const delimiters = options?.delimiters
+  const delimiters = options && options.delimiters
   if (delimiters) {
     tokenizer.delimiterOpen = toCharCodes(delimiters[0])
     tokenizer.delimiterClose = toCharCodes(delimiters[1])

packages/reactivity/src/effect.ts

@@ -128,7 +128,7 @@ export class ReactiveEffect<T = any> {
     if (this.active) {
       preCleanupEffect(this)
       postCleanupEffect(this)
-      this.onStop?.()
+      this.onStop && this.onStop()
       this.active = false
     }
   }

packages/reactivity/src/reactiveEffect.ts

@@ -146,5 +146,6 @@ export function trigger(
 }
 
 export function getDepFromReactive(object: any, key: string | number | symbol) {
-  return targetMap.get(object)?.get(key)
+  const depsMap = targetMap.get(object)
+  return depsMap && depsMap.get(key)
 }

packages/runtime-core/src/components/Suspense.ts

@@ -479,7 +479,7 @@ function createSuspenseBoundary(
   let parentSuspenseId: number | undefined
   const isSuspensible = isVNodeSuspensible(vnode)
   if (isSuspensible) {
-    if (parentSuspense?.pendingBranch) {
+    if (parentSuspense && parentSuspense.pendingBranch) {
       parentSuspenseId = parentSuspense.pendingId
       parentSuspense.deps++
     }
@@ -898,5 +898,6 @@ function setActiveBranch(suspense: SuspenseBoundary, branch: VNode) {
 }
 
 function isVNodeSuspensible(vnode: VNode) {
-  return vnode.props?.suspensible != null && vnode.props.suspensible !== false
+  const suspensible = vnode.props && vnode.props.suspensible
+  return suspensible != null && suspensible !== false
 }