"use strict" will save you from some of the foot guns but not all of them. E.g. it still allows the double equal comparisons I mentioned above, which have been

"use strict" will save you from some of the foot guns but not all of them. E.g. it still allows the double equal comparisons I mentioned above, which have been the source of some frustrating debugging sessions ever. If you want a safe language on the front end, use Elm.