Use ?. where it represents the intended semantics (#11512)

packages/babel-traverse/src/path/context.js

@@ -236,7 +236,7 @@ export function setup(parentPath, container, listKey, key) {
 export function setKey(key) {
   this.key = key;
   this.node = this.container[this.key];
-  this.type = this.node && this.node.type;
+  this.type = this.node?.type;
 }
 
 export function requeue(pathToQueue = this) {

packages/babel-traverse/src/path/conversion.js

@@ -170,7 +170,7 @@ function hoistFunctionEnvironment(
       p.isClassProperty({ static: false })
     );
   });
-  const inConstructor = thisEnvFn && thisEnvFn.node.kind === "constructor";
+  const inConstructor = thisEnvFn?.node.kind === "constructor";
 
   if (thisEnvFn.isClassProperty()) {
     throw fnPath.buildCodeFrameError(

packages/babel-traverse/src/path/evaluation.js

@@ -160,7 +160,7 @@ function _evaluate(path, state) {
       return deopt(binding.path, state);
     }
 
-    if (binding && binding.hasValue) {
+    if (binding?.hasValue) {
       return binding.value;
     } else {
       if (node.name === "undefined") {

packages/babel-traverse/src/path/inference/index.js

@@ -53,7 +53,7 @@ export function _getTypeAnnotation(): ?Object {
   }
 
   inferer = inferers[this.parentPath.type];
-  if (inferer && inferer.validParent) {
+  if (inferer?.validParent) {
     return this.parentPath.getTypeAnnotation();
   }
 }

packages/babel-traverse/src/path/inference/inferers.js

@@ -10,7 +10,7 @@ export function VariableDeclarator() {
 
   let type = init.getTypeAnnotation();
 
-  if (type && type.type === "AnyTypeAnnotation") {
+  if (type?.type === "AnyTypeAnnotation") {
     // Detect "var foo = Array()" calls so we can optimize for arrays vs iterables.
     if (
       init.isCallExpression() &&

packages/babel-traverse/src/path/removal.js

@@ -7,7 +7,7 @@ export function remove() {
   this._assertUnremoved();
 
   this.resync();
-  if (!this.opts || !this.opts.noScope) {
+  if (!this.opts?.noScope) {
     this._removeFromScope();
   }
 

packages/babel-traverse/src/path/replacement.js

@@ -196,7 +196,7 @@ export function _replaceWith(node) {
     t.validate(this.parent, this.key, node);
   }
 
-  this.debug(`Replace with ${node && node.type}`);
+  this.debug(`Replace with ${node?.type}`);
 
   this.node = this.container[this.key] = node;
 }
@@ -217,7 +217,7 @@ export function replaceExpressionWithStatements(nodes: Array<Object>) {
   }
 
   const functionParent = this.getFunctionParent();
-  const isParentAsync = functionParent && functionParent.is("async");
+  const isParentAsync = functionParent?.is("async");
 
   const container = t.arrowFunctionExpression([], t.blockStatement(nodes));