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Quick, read [STAGES.md](STAGES.md).\n\n---\n\n[cssdb] ranks CSS features by stages that reflect the real-life stability of\nnew CSS features.\n\nYou can read an [inside view of the CSSWG] to learn about the official\n(and unofficial) development stages of CSS specifications. In reality,\nspecifications and browser implementations happen out of sync. For example,\nthere are stable CSS features missing in all browsers, while other CSS features\ndeveloped outside the [CSSWG] have appeared in browsers behind flags. 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