Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 9 years ago.
Improve this question
I've tended to just loop over elements selectively to find elements of a specific class, but I'm curious if using getElementsByClassName (for applicable browsers) will increase performance at all.
How does it actually WORK?
I could easily run a test to check performance obviously, but I'm really curious what's going on in there anyway.
Related
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 3 years ago.
Improve this question
I want to remove all of the unused CSS classes from my stylesheet before I push my project to the server! But I don't find any shortcut way to do that.
It depends on how complex your project is and what way to usage classes in markup it is using. For simpler ones, something from the tools listed here can be helpful https://www.keycdn.com/blog/remove-unused-css. If your project is more complex, and if classes are created in the JS part on the flight, and then used, there might be no way to do clean up automatically
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 4 years ago.
Improve this question
Is there any resource to know the time complexity of natively defined array and string methods in JavaScript?
I have to do guess work while I am using them to solve algorithm, but I want to be sure about what is the time complexity of those functions?
This question has been answered previously:
Time Complexity for Javascript Methods in V8
In short, it's not specified and the time complexity for common JS methods can differ between browsers.
Worse yet, some methods might not even exist or will behave differently between different browsers and browser versions!
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 6 years ago.
Improve this question
I am searching for a javascript alternative for the following code:
$('a[href*="vivo.sx/"]').attr('href')
I have never worked with javascript. This may be very simple for someone who's more experienced with javascript.
I've done a version that does it both way for comparison..
Please note I've used document.querySelector, not document.querySelectorAll, if you use the All variant, remember you need to loop the result.
console.log( $('a[href*="vivo.sx/"]').attr('href') );
console.log( document.querySelector('a[href*="vivo.sx/"]').href );
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
one
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 7 years ago.
Improve this question
What is the best way to understand javascript complex code, like I use to debugger for understand the java complex code.
So, there is any way for javascript like java?
you can use either IE/Chrome Developer Tools, press F12 on the browser and afterward put any breakpoint on javascript file.
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 8 years ago.
Improve this question
I am realtivly new to web programming and I am looking for something similar as res/values/strings.xml in android, but for a webpage. Does something like this exist (a link to a book describing this solution)?
Thanks!
Try to read about knockout.js, I think it's useful framework in your case.