正则(随手记)

匹配获取src地址

var str = <p><img src="http://test.ttchezhu.com/Public/Admin/dataimg/task/20180122/20180122110425_61421.jpg" width="1080" height="2339"/><br/></p>
var reg = /src=[\'\"]?([^\'\"]*)[\'\"]?/i
str.match(reg)   //["src="http://test.ttchezhu.com/Public/Admin/dataimg/task/20180122/20180122110425_61421.jpg"", "http://test.ttchezhu.com/Public/Admin/dataimg/task/20180122/20180122110425_61421.jpg", index: 8, input: "<p><img src="http://test.ttchezhu.com/Public/Admin…_61421.jpg" width="1080" height="2339"/><br/></p>", groups: undefined]