ECMAScript support cheatsheet

Based on Mozilla's support

Assuming Chrome 39+, Firefox 38+, Safari 7.1+

Can be used now:

• const
• getters & setters
• { ['foo']: 'bar' }
• for .. of ..
• Object.getPrototypeOf()
• TypedArrays
• Array.prototype: indexOf(), lastIndef(), entries(), keys(), forEach(), every(), some()
• Math: log10(), log2(), log1p(), expm1(), cosh(), sinh(), tanh(), acosh(), asinh(), atanh(), hypot(), trunc(), cbrt(), imul(), fround()
• Promise: all(), race(), reject(), resolve()
• Map, Set, WeakMap

Except in Safari:

• { a, b, c }
• generators
• Map(iterable)
• Object.setPrototypeOf()
• Math: sign(), clz32()

Waiting catch up to Firefox

Safari 9

• String.raw
• 0b0, 0o0
• Object.asign()
• Array.from()
• String.prototype: startsWith(), endsWith(), includes(), repeat()
• Number.isNaN() (strict NaN)
• WeakSet

Chrome 41

• String.raw
• 0b0, 0o0
• String.prototype: startsWith(), endsWith(), includes(), repeat()

Chrome 42

• { method(){} }

Chrome 44

• Unicode codepoints & \u{}

Chrome 45

• () => {}
• Object.asign()
• Array: from(), of()
• Array.prototype: fill()[1], find()[1], findIndex()

Chrome 46

• Spread operator [2]

Chrome 47

• Rest params

Chrome 49

• Default params [2]
• Destructuring

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• [1] Supported in SF7 o.0
• [2] Not with destructuring 👎