29 lines
769 B
JavaScript
29 lines
769 B
JavaScript
import { types as t } from "@babel/core";
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export default function() {
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return {
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visitor: {
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BinaryExpression(path) {
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const { node } = path;
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if (node.operator === "instanceof") {
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const helper = this.addHelper("instanceof");
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const isUnderHelper = path.findParent(path => {
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return (
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(path.isVariableDeclarator() && path.node.id === helper) ||
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(path.isFunctionDeclaration() &&
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path.node.id &&
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path.node.id.name === helper.name)
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);
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});
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if (isUnderHelper) {
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return;
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} else {
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path.replaceWith(t.callExpression(helper, [node.left, node.right]));
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}
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}
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},
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},
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};
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}
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