ECMAScript® 2017 Language Specification (ECMA-262, 8th edition, June 2017) を読みましょう。また現時点でStage 4になっていてECMAScript 2018に含まれることが確定しているTemplate Literal Revisionとs/dotAll flag for regular expressionsも併せて読むと良いでしょう。
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2018年から誰でも始められるJavaScript
Last updated at Posted at 2017-12-28
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