ECMAScript
JavaScript
の仕様
ECMAScriptの使い方
https://gyazo.com/4c7b77260c99173defa206b97cba6c40
https://adrianmejia.com/overview-of-javascript-es6-features-a-k-a-ecmascript-6-and-es2015/#JavaScript-History
https://gyazo.com/10105c3e1f2dd5acba0895eb5a553de4
最近何入りそうなの？
tc39/proposals: Tracking ECMAScript Proposals
を見よ
策定プロセスは5段階
https://tc39.es/process-document/