Semicolons are not optional in JavaScript: ASI (http://www.ecma-international.org/ecma-262/6.0/#sec-automatic-semicolon-insertion http://www.ecma-international.

Semicolons are not optional in JavaScript: ASI (http://www.ecma-international.org/ecma-262/6.0/#sec-automatic-semicolon-insertion http://www.ecma-international.org/ecma-262/6.0/#sec-automati...) is an error correction scheme for novice programmers. The spec's parsing rules calls out the statements following where a semicolon should be "offending tokens". There is no leeway here for style or preference.