Thursday, April 12, 2012

What is the difference between " and " in JavaScript?


I saw this question and I am wondering about the same thing in JavaScript.



If you use the character ' or the character " when making strings in JavaScript, the application seems to behave the same. So what is the difference between these two characters?



The only advantage I have seen in using ' to build strings is that I can do stuff like:




var toAppend = '<div id="myDiv1"></div>';



Instead of:




var toAppend = "<div id=\"myDiv1\"></div>";



Is there any significant difference between them that I should be aware of?


Source: Tips4all

4 comments:

  1. They are equivalent for all intents and purposes. If you want to use either one inside a string, it is a good idea to use the other one to create the string, as you noted. Other than that, it's all the same.

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  2. There's no difference. The reason for its existence is exactly what you mentioned

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  3. Your example is the best example to describe the difference between the two....

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  4. I think there is another difference. If you do the following

    var str1 = 'The \' character';
    var str2 = 'The " character';
    var str3 = "The ' character";
    var str4 = "The \" character";
    document.write (str1.replace("'","%26");
    document.write (str2.replace('"',"%22");
    document.write (str3.replace("'","%26");
    document.write (str4.replace('"',"%22");


    The document.write will fail for str1 and str4. That is the difference, but I don't know if there is a workaround to make them work.

    ReplyDelete