I get the href
of a
elements by
const hrefs = await page.evaluate(() =>
Array.from(document.body.querySelectorAll('a'), ({ href }) => href));
but when I try to get aria-label
or data-xx
of div
elements, this method does not work.
Why is that and how can I get aria-label
or data-xx
attributes of div
elements?
HTML
<div class="test" arial-label="something" data-all="something">
</div>
Only some of the HTML attributes are exposed on the DOM node. And even the exposed one might contain a different value: The href
attribute of the DOM node is not the same as the attribute written into the HTML ( <a href="..."></a>
). To give an example:
<a id="link" href="test.html">Link</a>
Accessing document.querySelector('#link').href
will return the full path (eg http://example.com/test.html
) instead of test.html
. To get the original element attribute you have to use the function getAttribute
.
Coming back to your code, that means you can read aria-label
and data-all
by using getAttribute
like this:
Array.from(document.body.querySelectorAll('div'), (el) => el.getAttribute('aria-label'));
Array.from(document.body.querySelectorAll('div'), (el) => el.getAttribute('data-all'));
For accessing the data
attribute, there is an additional solution available. You can access the data
values by using a special attribute called dataset
, which allows to read the value of data-xx
like this:
Array.from(document.body.querySelectorAll('div'), (el) => el.dataset.xx);
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.