使用javascript正则表达式获取十进制数字

Question

Sorry for the noob question.

var regex = ??
var a = '<span class="star" id="1.00"></span>';
var number = a.match(regex);

How can I get the 1.00 using regex?

Thanks for the help..

Answer 1

Try this :

var regex = /id\="(\d+(\.\d+)?)"/i;
var a = '<span class="star" id="1.00"></span>';
var number = a.match(regex); 
 alert(number[1])

Answer 2

Forexample:

var regex = /[0-9\.]+/;
var a = '<span class="star" id="1.00"></span>';
var number = a.match(regex);

alert(number);

Answer 3

You can use:

var a = '<span class="star" id="1.00"></span>';
var m = a.match( /\bid=(["']?)([^"']+)\1/i );
var id;
if (m) 
    id = m[2]; // 1.00

Answer 4

IMHO using regex wont solve your problem, you should first craete an html element from the string and then get the id.

var s = '<span class="star" id="1.00"></span>';
var div = document.createElement('div');
div.innerHTML = s;
var element = div.firstChild;

console.log(element.getAttribute("id"))

output:

1.00