Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
201 views
in Technique[技术] by (71.8m points)

javascript - Finding whether the element exists in whole html page

I want to check whether an element exists in the whole page or not. Is there any way to know if the element exists in the page through jQuery?

For example:

<html>
     <body>
        <p id="para1" class="para_class"></p>
     </body>
</html>

In the above code, I have to check whether <p> of id para1 exists in the DOM or not. In any case if with the help of the 'class' attribute we can know if the element exists, it also would be helpful.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

For element IDs:

if($('#para1').length){
  //element with id exists
}

For element class:

if($('.para_class').length){
  //element with class exists
}

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...