Sloppy mode block bindings (let, class, const, function) (ES6)

Enable ES6-style block-scoped bindings including let and class in sloppy mode, and modify semantics of const and function to operate according to ES6 in sloppy mode.

Documentation

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/class

Specification

Established standard

Status in Chromium

Blink components: Blink

Enabled by default in:

• Chrome for desktop release 49
• Chrome for Android release 49
• Opera release 36
• Opera for Android release 36

Consensus & Standardization

• Firefox: Shipped
• Edge: Shipped
• Safari: In development
• Web Developers: Strongly positive

Owners

• littledan@chromium.org
• rossberg@chromium.org

Last updated on 2017-06-14