如何使用 Javascript 替换字符串中的大引号？

Question

I am trying to replace curly quotes:

str = '“I don’t know what you mean by ‘glory,’ ” Alice said.';

Using:

str.replace(/['"]/g,'');

Why it does not work? How can I do this?

Answer 1

You might have to (or prefer to) use Unicode escapes:

var goodQuotes = badQuotes.replace(/[\u2018\u2019]/g, "'");

That's for funny single quotes; the codes for double quotes are 201C and 201D.

edit — thus to completely replace all the fancy quotes:

var goodQuotes = badQuotes
  .replace(/[\u2018\u2019]/g, "'")
  .replace(/[\u201C\u201D]/g, '"');

Answer 2

It doesn't work because you're trying to replace the ASCII apostrophe (or single-quote) and quote characters with the empty string, when what's actually in your source string aren't ASCII characters.

str.replace(/[“”‘’]/g,'');

works.

Answer 3

Combining Pointy and Wooble's answers, if you want to replace the curly quotes with regular quotes:

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

So for example:

 str = '“I don't know what you mean by 'glory,' ” Alice said.'; str = str.replace(/[“”]/g, '"').replace(/['']/g, "'"); console.log(str)

Answer 4

I know this is an old question. Just want to add something. The quotes you are trying to replace are called "Smart Quotes".

The below function covers most of them

public static String replaceSmartQuotes(String str) {
    String retVal = str;
    retVal = retVal.replaceAll( "[\u2018\u2019\u201A\u201B\u2032\u2035]", "'" );
    retVal = retVal.replaceAll("[\u201C\u201D\u201E\u201F\u2033\u2036]","\"");
    return retVal;
}

Hope this helps someone.