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Fix ASI hazards issue #829

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Fix ASI hazards issue #829

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6 changes: 4 additions & 2 deletions src/transformers/CJSImportTransformer.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -678,14 +678,16 @@ export default class CJSImportTransformer extends Transformer {
* For example, this:
* export const {x: [a = 2, b], c} = d;
* becomes this:
* ({x: [exports.a = 2, exports.b], c: exports.c} = d;)
* ;({x: [exports.a = 2, exports.b], c: exports.c} = d;)
*/
private processComplexExportVar(): void {
this.tokens.removeInitialToken();
this.tokens.removeToken();
const needsParens = this.tokens.matches1(tt.braceL);
if (needsParens) {
this.tokens.appendCode("(");
this.tokens.appendCode(";(");
} else if (this.tokens.matches1(tt.bracketL)) {
this.tokens.appendCode(";");
}

let depth = 0;
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10 changes: 5 additions & 5 deletions test/imports-test.ts
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Expand Up @@ -1259,13 +1259,13 @@ module.exports = exports.default;
export let {y}: Foo = z;
`,
`"use strict";${ESMODULE_PREFIX}
( {a: exports.a = 2, b: [exports.c, exports.d], ...exports.e} = f);
[exports.g = 3, ...exports.h] = i;
( {j: exports.j} = k);
( {l: exports.l = () => {const m = 3;}} = {});
;( {a: exports.a = 2, b: [exports.c, exports.d], ...exports.e} = f);
; [exports.g = 3, ...exports.h] = i;
;( {j: exports.j} = k);
;( {l: exports.l = () => {const m = 3;}} = {});
exports.x;
exports.x = 2;
( {y: exports.y} = z);
;( {y: exports.y} = z);
`,
{transforms: ["imports", "typescript"]},
);
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