/**
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* Safari 10.3 had an issue where async arrow function expressions within any class method would throw.
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* After an initial fix, any references to the instance via `this` within those methods would also throw.
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* This is fixed by converting arrow functions in class methods into equivalent function expressions.
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* @see https://bugs.webkit.org/show_bug.cgi?id=166879
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*
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* @example
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* class X{ a(){ async () => {}; } } // throws
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* class X{ a(){ async function() {}; } } // works
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*
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* @example
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* class X{ a(){
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* async () => this.a; // throws
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* } }
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* class X{ a(){
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* var _this=this;
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* async function() { return _this.a }; // works
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* } }
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*/
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const OPTS = {
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allowInsertArrow: false,
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specCompliant: false,
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};
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export default ({ types: t }) => ({
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name: "transform-async-arrows-in-class",
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visitor: {
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ArrowFunctionExpression(path) {
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if (path.node.async && path.findParent(t.isClassMethod)) {
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path.arrowFunctionToExpression(OPTS);
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}
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},
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},
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});
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