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Skip traversal of null nodes #3

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Skip traversal of null nodes #3

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12 changes: 8 additions & 4 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,28 +20,32 @@ function traverse(context, node, visitor) {
let result = visitor(currentPath)
if (result === STOP) break
if (result === SKIP) continue

let currentNode = currentPath.node
if (currentNode == null) continue

let visitorKeys = allVisitorKeys[currentPath.node.type]
let visitorKeys = allVisitorKeys[currentNode.type]
if (!visitorKeys) continue

for (let visitorKey of visitorKeys) {
let child = currentPath.node[visitorKey]
let child = currentNode[visitorKey]

if (!child) {
continue
} else if (Array.isArray(child)) {
for (let item of child) {
if (item == null) continue
queue.push({
node: item,
parent: currentPath.node,
parent: currentNode,
parentKey: visitorKey,
parentPath: currentPath,
})
}
} else {
queue.push({
node: child,
parent: currentPath.node,
parent: currentNode,
parentKey: visitorKey,
parentPath: currentPath,
})
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