javascript - 如果需要，将http添加到链接

以下是在jquery确认框中显示的字符串。

warningString = "<p style='margin-top: 12px;'>Please Verify the following URL is a valid Redirect URL.</p> <a href= " + redirURL + "' target='_blank'>" + redirURL + "</a><p style='margin-top: 8px;'> By clicking verify you are confirming this is a valid URL and will proceed with checkout. </p>";

如果变量redirURL缺少它，我想添加http://的链接。我对如何做有点迷茫。

谢谢

最佳答案

那么如何:

if(redirURL.IndexOf('http') !== 0)
  redirURL = 'http://' + redirURL;
warningString = "<p style='margin-top: 12px;'>Please Verify the following URL is a valid Redirect URL.</p> <a href= " + redirURL + "' target='_blank'>" + redirURL + "</a><p style='margin-top: 8px;'> By clicking verify you are confirming this is a valid URL and will proceed with checkout. </p>";