I also talk about JavaScript regular matching

One, JavaScript regular global match G caution with the test () method

Here's an example:

var  a =/^[a-z]+/gi;a.test (' bb123 ');//truea.lastindex;//0a.test (' bb123 ')    //Falsea.lastindex;//2a.test (' Bb123 ');  True

Why is it that this is the right thing to do and the wrong situation? This is what should be affected by the global match G effect. Hey

Because the test method is called multiple times when the match starts from the last match, it can cause an error problem that cannot be matched. (even if the content conforms to the requirements of a regular expression, the test () method tests the output false instead of true. ）

I'll finish it later. Http://www.coding123.net/article/20130108/javascript-regex-global-matcth-care-of-test-method.aspx

http://tool.chinaz.com/regex/

I also talk about JavaScript regular matching