fix: fix build errors in webpack5 (#72)

Author: baiwusanyu-c

packages/sub-style/src/inject/inject-api-custom-element.ts

@@ -86,6 +86,7 @@ export function injectApiCustomElement(
 ) {
   if (node.type === 'Identifier'
     && node.name === 'VueElement'
+      && parent
     && parent.type === 'ClassDeclaration')
     isVueElementIdentifier = true
 
@@ -109,6 +110,7 @@ export function injectApiCustomElement(
 
   if (node.type === 'Identifier'
     && node.name === '_applyStyles'
+      && parent
     && parent.type === 'ClassMethod'
     && isVueElementIdentifier
     && isBaseClassIdentifier) {

packages/sub-style/src/inject/inject-component.ts

@@ -15,6 +15,7 @@ export function injectToComponent(
   parent: FunctionDeclaration,
 ) {
   if (node.type === 'Identifier'
+      && parent
       && parent.type === 'FunctionDeclaration'
       && node.name === 'createComponentInstance')
     isCreateComponentInstance = true

packages/sub-style/src/inject/inject-render.ts

@@ -34,6 +34,7 @@ export function injectToRenderer(
     isComponentUpdateFnIdentifier = true
 
   if (isComponentUpdateFnIdentifier
+      && parent
     && parent.type === 'VariableDeclarator'
     && node.type === 'Identifier'
     && node.name === 'subTree') {
@@ -45,6 +46,7 @@ export function injectToRenderer(
     isUnmountIdentifier = true
 
   if (isUnmountIdentifier
+      && parent
     && parent.type === 'CallExpression'
     && node.type === 'Identifier'
     && node.name === 'unmountComponent') {

packages/v-model/src/inject-patch-prop.ts

@@ -26,6 +26,7 @@ export function injectPatchProp(
 ) {
   if ((node as Identifier).type === 'Identifier'
     && (node as Identifier).name === 'patchProp'
+      && parent
     && parent.type === 'VariableDeclarator')
     isPatchPropIdentifier = true