从DOM解析HTML

Question

I'm trying to parse the alt text from the following HTML code, that I got from the Xpath denoted as "FIRST_RECORD_LINK".

 <img data-aria-label-part="" src="https://pbs.twimg.com/media/Dc10VX_UwAAJxPM.jpg" alt="Millenials are more likely than Baby Boomers to be living with a disability. Provided by the Center for Talent Innovation Disability Inclusion Report."> 

My javascript code looks like this:

 var FIRST_RECORD_LINK = '//*[@id="stream-item-tweet-999772032685527042"]/div[1]/div[2]/div[3]/div/div/div/div/img'; var FIRST_RECORD = document.evaluate(FIRST_RECORD_LINK, document, null, XPathResult.ANY_TYPE, null).iterateNext(); console.log(FIRST_RECORD); var parser = new DOMParser(); var xmlDoc = parser.parseFromString(FIRST_RECORD,"text/html"); console.log(xmlDoc.getElementsByTagName("img")[0].childNodes[0].getAttribute("alt")); 

What am I doing wrong? I apologize in advance for not using the code boxes, i'm visually impaired and they're not working with my screen reader.

Answer 1

Once you have obtained the img in FIRST_RECORD by evaluating the xpath, you can read the alt attribute with getAttribute :

FIRST_RECORD.getAttribute('alt');

See a working example (with an updated xpath so it works in stackoverflow):

 // The following path was modified to work in stackoverflow var FIRST_RECORD_LINK = '//img'; var FIRST_RECORD = document.evaluate(FIRST_RECORD_LINK, document, null, XPathResult.ANY_TYPE, null).iterateNext(); console.log(FIRST_RECORD); console.log(FIRST_RECORD.getAttribute('alt')); 

 <img data-aria-label-part="" src="https://pbs.twimg.com/media/Dc10VX_UwAAJxPM.jpg" alt="Millenials are more likely than Baby Boomers to be living with a disability. Provided by the Center for Talent Innovation Disability Inclusion Report.">