--- date: 20201113 id: 7aa626ee-1b0b-4d7c-8e11-751f8b9cac1f title: ES2019 --- # Array ## Prototype methods - [Array.prototype.flatMap()](20201113112058-array_prototype_flatmap) - [Array.prototype.flat()](20201113112029-array_prototype_flat) ### Sort - [.sort() is guaranteed to be stable](20201116155810-sort_is_guaranteed_to_be_stable) # Control flow - [Optional Catch Binding](20201116154824-javascript_optional_catch_binding) # Objects ## Functions - [Object.fromEntries](20201116095124-object_fromentries) # Strings ## String Prototype methods - [trimStart](20201116100205-trimstart) - [trimEnd](20201116100239-trimend) # Symbols ## Symbol Prototype methods - [Symbol.prototype.description](20201116101509-symbol_prototype_description)