Question

这里我有像http://www.thidiff.com/&sa=U&ved=0ahUKEwiexM7XmaPRAhWmrVQKHUmXDXMQ_BcIYygBMBA&usg=AFQjCNEf9K9tDpISjuX1qkTOHK_aeiPrwQ

这样的链接

我想要的是http://www.thidiff.com/之前&如何做到

我有样本hrefs

$('a.ganna').each(function(){
   var href = $(this).attr('href');
   var ampIndex = href.indexOf('&');
   console.log(ampIndex);
  var httIndex = href.indexOf('htt');
  console.log(httIndex);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<a class="ganna" href="/url?q=http://www.thidiff.com/&amp;sa=U&amp;ved=0ahUKEwiexM7XmaPRAhWmrVQKHUmXDXMQ_BcIYygBMBA&amp;usg=AFQjCNEf9K9tDpISjuX1qkTOHK_aeiPrwQ">Website</a>


<a class="ganna" href="/url?q=http://www.sahasraadvisoryagency.com/&amp;sa=U&amp;ved=0ahUKEwjOxOnmmaPRAhUHh1QKHRR3B4cQ_BcIVCgBMA4&amp;usg=AFQjCNFIbN_BcKr1501xZcqpER22-Bfy4A">Website</a>

我的预期输出：

http://www.thidiff.com/

http://www.sahasraadvisoryagency.com/

Answer 1

您正在寻找substr功能：

href.substr(httIndex, ampIndex-httIndex);

此处提供的工作示例：

https://jsfiddle.net/04fzt0br/

修改：该功能的签名是：string.substr(startIndex, length)

Answer 2

你也可以这样做。

$('a.ganna').each(function(){
   var href = $(this).attr('href').split('=')[1]; //splitting by `=` sign and getting 2nd element
   var domain = href.slice(0, href.indexOf('&')); //slicing string upto `&`
   console.log(domain);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
<a class="ganna" href="/url?q=http://www.thidiff.com/&amp;sa=U&amp;ved=0ahUKEwiexM7XmaPRAhWmrVQKHUmXDXMQ_BcIYygBMBA&amp;usg=AFQjCNEf9K9tDpISjuX1qkTOHK_aeiPrwQ">Website</a>


<a class="ganna" href="/url?q=http://www.sahasraadvisoryagency.com/&amp;sa=U&amp;ved=0ahUKEwjOxOnmmaPRAhUHh1QKHRR3B4cQ_BcIVCgBMA4&amp;usg=AFQjCNFIbN_BcKr1501xZcqpER22-Bfy4A">Website</a>

Answer 3

使用正则表达式提取网址：

＆＃13;

var re = /http:\/\/+(www.[a-z0-9]+).com/g;
var sel = document.querySelectorAll('.ganna');

[].forEach.call(sel, function(el){
  console.log(JSON.stringify(el.href.match(re)[0], 0, 0));
})

＆＃13;

<a class="ganna" href="/url?q=http://www.thidiff.com/&amp;sa=U&amp;ved=0ahUKEwiexM7XmaPRAhWmrVQKHUmXDXMQ_BcIYygBMBA&amp;usg=AFQjCNEf9K9tDpISjuX1qkTOHK_aeiPrwQ">Website</a>
<a class="ganna" href="/url?q=http://www.sahasraadvisoryagency.com/&amp;sa=U&amp;ved=0ahUKEwjOxOnmmaPRAhUHh1QKHRR3B4cQ_BcIVCgBMA4&amp;usg=AFQjCNFIbN_BcKr1501xZcqpER22-Bfy4A">Website</a>

＆＃13;

我怎么能得到前面的＆ur;

3 个答案: