<!-- 🚨 STOP 🚨 𝗦𝗧𝗢𝗣 🚨 𝑺𝑻𝑶𝑷 🚨 Half of all issues filed here are duplicates, answered in the FAQ, or not appropriate for the bug tracker. Please help us by doing the following steps before logging an issue: * Search: https://github.com/Microsoft/TypeScript/search?type=Issues * Read the FAQ, especially the "Common Feature Requests" section: https://github.com/Microsoft/TypeScript/wiki/FAQ --> ## Search Terms "lastIndex" ## Suggestion `RegExp.lastIndex` should have a doc comment - you can see it lacks one here: https://github.com/microsoft/TypeScript/blob/7fc456f2d70348725bbef92732b98a33c07f85ad/lib/lib.es5.d.ts#L944 MDN doc for the property can be found [here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/lastIndex).
