Why Doesn't My JavaScript `replace()` Method Work as Expected?

Dealing with Unresponsive Replace Method

In situations where the replace method fails to perform as expected, it's crucial to understand the immutability of strings in JavaScript. Unlike many other languages, strings in JavaScript are unchangeable, meaning that "replacement" methods don't modify the original string but instead generate a new one.

Correcting the Code

To effectively replace smart and registered symbol quotes, use the following code:

str = str.replace(/[“”]/g, '"');
str = str.replace(/[‘’]/g, "'");

Alternatively, you can perform all replacements in a single statement:

str = str.replace(/[“”]/g, '"').replace(/[‘’]/g, "'");

Understanding String Immutability

The Mozilla Developer Network (MDN) documentation for replace states:

"Returns a new string with some or all matches of a pattern replaced by a replacement. ... This method does not change the String object it is called on. It simply returns a new string."

This indicates that the replace method preserves the original string and provides a new one with the replacements applied. Keep this in mind when working with strings in JavaScript to avoid confusion and ensure accurate string manipulation.

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