This article covers features introduced in SpiderMonkey 38
Determine if a string's characters are stored as Latin1.
bool JS_StringHasLatin1Chars(JSString *str);
||String to examine.|
true iff the string's characters are stored as Latin1.
String characters are stored as either Latin1Char (8-bit) or char16_t (16-bit). Clients can use JS_StringHasLatin1Chars and can then call either the Latin1* or TwoByte* functions. Some functions like
JS_GetStringCharAt accept both Latin1 and TwoByte strings.