The result of == on strings is defined as comparison UTF-16 code unit by UTF-16 code unit (non-normalised). The result of == on what the spec calls "Object valu

The result of == on strings is defined as comparison UTF-16 code unit by UTF-16 code unit (non-normalised). The result of == on what the spec calls "Object values" (including arrays) is by identity. Here's the spec: https://tc39.es/ecma262/#sec-samevaluenonnumber https://tc39.es/ecma262/#sec-samevaluenonnumber > 7.2.12 SameValueNonNumber ( x, y ) [...] > 5. If x is a String, then > a. If x and y are exactly the same sequence of code units (same length and same code units at corresponding indices), return true; otherwise, return false. [...] > 8. If x and y are the same Object value, return true. Otherwise, return false.