![]() Our team has been focusing on performance after observing extremely poor editing/compilation speed with packages like material-ui and styled-components. TypeScript 3.9 ships with many new speed improvements. We’ll be experimenting more with the feature, but we won’t be shipping it as part of this release. ![]() We initially anticipated shipping awaited in TypeScript 3.9, but as we’ve run early TypeScript builds with existing codebases, we’ve realized that the feature needs more design work before we can roll it out to everyone smoothly.Īs a result, we’ve decided to pull the feature out of our main branch until we feel more confident. This goal of this type operator is to accurately model the way that Promise unwrapping works in JavaScript. If you’ve been following our issue tracker and design meeting notes, you might be aware of some work around a new type operator called awaited. If you’ve been stuck on older versions of TypeScript due to issues around Promises, we encourage you to give 3.9 a shot! What About the awaited Type? Thanks to a pull request from Jack Bates, this has been fixed with improvements in our inference process in TypeScript 3.9. ![]() The fact that sealExhibit contained an undefined somehow poisoned type of lion to include undefined.
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