如果没有发生替换，javascript 字符串替换是否创建一个新字符串？

Question

    let s = 'ABC';
    s = s.replace('D', 'E');

Is s the same string (in the memory aspect, not it's value) after this?

According to the MDN, it says the return value is A new string, with some or all matches of a pattern replaced by a replacement. , but I'd like to know if the special case with "NO" matches would return the original string without creating a new one.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace

Answer 1

Strings are immutable in Javascript so the variable will now point to a new reference in memory with the new value. However the previous value will still exist in the old location in memory until it is garbage collected.