javascript中没有数字和字符的字符串的正则表达式

Question

I have no idea how to make the pattern of the regular expression of a line of string containing ONLY alphabet.

var pattern = //the pattern is here;
var name = "My Name";
if(!pattern.test(name))
{
   return true;
}
else {
    return false;
}

Please, Help me.

Answer 1

If you search a little bit about the basics of regex, you will find that you can use a pattern to match ranges, for instance:

[A-Z] ----> will match letter from A to Z in upper case where
[a-z] ----> will match letter from A to Z in lower case.
[A-Za-z] -> will match all letters from A-Z case insensitive 

Then, if you are lazy, you can use an insensitive flag like

(?i)[a-z]

So, for your what you stated about ONLY alphabet, you can use:

(?i)^[a-z]+$    But this won't match: `My Name` because you have a space.
(?i)^[a-z ]+$   This will match: `My Name`

You can read more on http://www.regular-expressions.info/quickstart.html

Btw, if you show some effort in your question and post your attempt you can avoid community to downvote