fix: handle tokens for invalid template element #14055
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JLHwung
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PR: Bug Fix 🐛
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Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/50370/ |
nicolo-ribaudo
approved these changes
Dec 14, 2021
| @@ -135,7 +135,7 @@ function babel7CompatTokens(tokens) { | |||
| // ends with '`' | |||
| templateElementEnd = end - 1; | |||
| templateElementEndLoc = createPositionWithColumnOffset(loc.end, -1); | |||
| templateValue = value.slice(1, -1); | |||
| templateValue = value === null ? null : value.slice(1, -1); | |||
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Nit: we can use value?.slice
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I don't think so. We need returning null when value is null.
existentialism
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Dec 14, 2021
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This PR fixes a regression introduced at #13919. We skip evaluating the template value when a template element is invalid, i.e. it may contain invalid Unicode escape or octal escape.
Since Babel parser updates have broken prettier for several times (https://github.com/babel/babel/issues?q=is%3Aissue+label%3A%22i%3A+regression%22+prettier+label%3A%22pkg%3A+parser%22), I plan to add prettier-e2e test in another PR so hopefully a babel parser patch release will not break prettier in the future.