Javascript 如何使用jquery添加img标签的alt属性
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How to add an alt attribute of img tags with jquery
提问by user1301411
I've put a google map in a page and it makes lots of img tags without the alt attribute, how can I add the alt for each img in a div in jquery, what's I gotta make instead of :
我在页面中放置了一个谷歌地图，它制作了很多没有 alt 属性的 img 标签，如何在 jquery 的 div 中为每个 img 添加 alt，我必须制作什么而不是：
$('#map_canvas > img[alt]').attr('image');
Thanks
谢谢
回答by VisioN
To set alternative text to all the images:
为所有图像设置替代文本：
$('#map_canvas > img').attr('alt', 'Alternative text');
To set alternative text to images that does not have altattribute:
为没有alt属性的图像设置替代文本：
$('#map_canvas > img:not([alt])').attr('alt', 'Alternative text');
回答by Crontab
Try:
尝试：
$("#map_canvas > img:not([alt])").attr("alt", "<YOURALTTEXT>");
回答by Andrea Turri
This work:
这项工作：
$('#map_canvas').find('img:not([alt])').attr('alt', 'Alt text');
回答by Richard
You could do:
你可以这样做：
$('#map_canvas > img[alt=""]').each(function()
{
$(this).attr('alt', $(this).attr('src');
});
This would find all images within #map_canvasthat do not have an alttag, and then set the alttag to be the same as the image src.
这将找到#map_canvas其中没有alt标签的所有图像，然后将alt标签设置为与图像相同src。
Alternatively, I would recommend:
或者，我建议：
$('#map_canvas > img[alt=""]').attr('alt', 'Alt text');
As this will only add alt tags to images that don't have one.
因为这只会向没有 alt 标签的图像添加 alt 标签。
回答by Bibin Velayudhan
$('#map_canvas > img').attr('alt', 'alt_text');
