New JavaScript features in ES2019:
Array#{flat,flatMap}
Object.fromEntries
String#{trimStart,trimEnd}
Symbol#description
try { } catch {} // optional binding
JSON ⊂ ECMAScript
well-formed JSON.stringify
stable Array#sort
revised Function#toString
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What are some proposals that nearly, but didn’t, make it in?
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Stage 3 proposals: https://github.com/tc39/proposals#stage-3 … Most of them still need implementations + tests.
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