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jsの論理演算子の順番

Last updated at Posted at 2019-08-10
const a = 1
const b = 2
console.log((a === a && a === b) || b === b) //--- ①
console.log(a === a && (a === b || b === b)) //--- ②
console.log(a === a && a === b || b === b) //--- ③

①、②はtrueってわかるけど
③は、a === a && a === bの時点でfalseが返されるもんだと思ってた。
実際はすべてtrue

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