43 lines
901 B
JavaScript
43 lines
901 B
JavaScript
export default function () {
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const immutabilityVisitor = {
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enter(path, state) {
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const stop = () => {
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state.isImmutable = false;
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path.stop();
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};
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if (path.isJSXClosingElement()) {
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path.skip();
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return;
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}
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if (path.isJSXIdentifier({ name: "ref" }) && path.parentPath.isJSXAttribute({ name: path.node })) {
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return stop();
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}
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if (path.isJSXIdentifier() || path.isIdentifier() || path.isJSXMemberExpression()) {
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return;
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}
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if (!path.isImmutable()) stop();
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}
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};
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return {
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visitor: {
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JSXElement(path) {
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if (path.node._hoisted) return;
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const state = { isImmutable: true };
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path.traverse(immutabilityVisitor, state);
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if (state.isImmutable) {
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path.hoist();
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} else {
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path.node._hoisted = true;
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}
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}
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}
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};
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}
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