getify/You-Dont-Know-JS

Choose this fork if you want the YDKJS material in Spanish and are comfortable with a translation-focused, low-activity repository. Choose upstream if you need the freshest canonical source or active maintenance.

Prefer this fork only if you specifically want a localized, independently maintained derivative of the JS book series. If you want the canonical, current upstream text and structure, upstream is the better choice.

Choose this fork if your goal is Chinese-language access or a translation base. Do not choose it if you want a current, upstream-aligned copy of the completed second-edition project; it is materially diverged and stale.

Choose this fork only if you want a static, customized mirror of the book series. If you want the current canonical content, active publishing updates, or anything close to upstream, the original repository is the better choice.

Choose the upstream repo if you want the current canonical book source. Choose this fork only if you specifically want an older, legacy layout or a historical snapshot and do not need ongoing updates.