Get class object with native JS

Heard is the most commonly used .... I saw the art of DOM programming thinking. 5 years of well-developed UI front-end framework!

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">  
There are times when multiple DOM classes are the same, and can be handled as follows: 5 years of well-developed UI front-end framework!
var A=getelementsclass (" Ca "), for (Var i=0;i<a.length;i++) {(function (i) {alert (a[i])}) (i)} 
  
If there are multiple identical classes can also be used together, if you want to reach JQ where can be directly. Click also needs to do some more complicated processing
Get class object with native JS