javascript - how to set href value on all elements with a given ID? - Stack Overflow

admin管理员组

文章数量:1391999

I have several anchor tags on a page with the same id of 'hrefCompare'. I need to dynamically set the value of the href attribute on ALL of these a tags.

I am currently trying to do this:

$("#hrefCompare").attr("href", "foobar");

However, this only sets the very first anchor tag with that ID. there's 7 more on this page with the same id of 'hrefCompare'. How can I set all of the href values with that ID?

I have several anchor tags on a page with the same id of 'hrefCompare'. I need to dynamically set the value of the href attribute on ALL of these a tags.

I am currently trying to do this:

$("#hrefCompare").attr("href", "foobar.");

However, this only sets the very first anchor tag with that ID. there's 7 more on this page with the same id of 'hrefCompare'. How can I set all of the href values with that ID?

• javascript
• jquery

Share Improve this question Follow edited Jul 3, 2013 at 16:32 PSL 124k2121 gold badges256256 silver badges243243 bronze badges asked Jul 3, 2013 at 16:31 dferrarodferraro 6,4481212 gold badges5050 silver badges7171 bronze badges 4

• 6 IDs must be unique. Use classes instead. – j08691 Commented Jul 3, 2013 at 16:32
• You are at failure then... Use unique ids. If url is same for all then use class instead. – PSL Commented Jul 3, 2013 at 16:32
• Use classes or something like data-hrefpare='true' – René Commented Jul 3, 2013 at 16:33
• what's with all the downvoting on this question? – dferraro Commented Jul 3, 2013 at 17:50

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 7

id must be unique, in this case I advice you to use class, which should work flawlessly:

$(".hrefCompare").attr("href", "foobar.");

<a href="#" class="hrefCompare">a</b>
<a href="#" class="hrefCompare">b</b>

You cannot do this with IDs (they are unique), try using the same css class for all the elements you want (doesn't matter if this class does not exist).

HTML:

<a href="javascript:void(0);" class="hrefCompare">text1</a>
<a href="javascript:void(0);" class="hrefCompare">text2</a>

Please avoid using # in href attributes (if you care about behaviors). Read this to know why: Which "href" value should I use for JavaScript links, "#" or "javascript:void(0)"?

Then:

For older jQuery versions use .attr(..) otherwise use .prop(..)

$('.hrefCompare').prop('href', 'http://www.foobar.');

Finally:

1) To assign the same url to every href attribute of an anchor element, do the following:

$('.hrefCompare').map(function(i, v){ return $(this).prop('href', 'http://www.foobar.'); });

2) To assign different urls to every href attributes of the anchors according to their possitions (like an array - starting from zero -), do the following:

$('.hrefCompare').map(function(i, v){ 
    if(i === 0) url = 'http://www.stackoverflow.';
    if(i === 1) url = 'http://www.foobar.';
    return $(this).prop('href', url);
});

Using this way...

first anchor, position 0: (text1 => if clicked => will redirect to stackoverflow)

second anchor, position 1: (text2 => if clicked => will redirect to foobar)

Ids must be unique in a DOM. try to use a class name and use jquery each function

$('a').each(function(k,v){
  $(v).attr('href','mylink');
});

本文标签： javascripthow to set href value on all elements with a given IDStack Overflow