jquery - toggleClass when specific section is on screen -


this question has answer here:

i making 1 big scroll page. , nav fixed positioned. want change color (from black white , vice versa) on nav when reaches specific sections on page. it's because of them white, , of them dark - want make contrast. made class in css should toggled. having difficulties using code. take @ it:

https://jsfiddle.net/lp27vuu4/

$(window).scroll(function (event) {      var scroll = $(window).scrolltop();          $('nav').toggleclass('light-mode',              //add 'light-mode' class when div position match or exceeds else remove 'light-mode' class.              scroll >= $('.section2').offset().top          );      });        //trigger scroll      $(window).scroll();//ensure if you're in current position when page refreshed
body {    margin: 0px;    padding: 0px;  }    nav {    width: 100%;    position: fixed;    text-align: center;    padding-top: 20px;    padding-bottom: 20px;  }    .light-mode {      color: #fff;  }    .section1 {     width: 100%;     height: 400px;     background-color: #fff;     color: #000;     padding: 100px;  }    .section2 {     width: 100%;     height: 400px;     background-color: #000;     color: #fff;     padding: 100px;  }    .section3 {     width: 100%;     height: 400px;     background-color: #fff;     color: #000;     padding: 100px;  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <nav>      <h3>navigation links</h3>  </nav>  <section class="section1">      section 1  </section>  <section class="section2">      section 2  </section>  <section class="section3">      section 3  </section>

the conclusion:

my navigation default dark colored. when reach section dark want tell jquery add class .light-mode <nav>. when user goes off section, want go normal (so delete class). in solution has issues:

  1. it seems not going original when user not on section.
  2. the class added when user scrolls top bottom page. looks on .offset().top. want make more professional , universal. want add class when each section on screen not matter if bottom or top.

what want add class if scroll + offset of h3 greater offset of section , remove if scroll + offset of h3 greater offset of section + it's height.

check out this: https://jsfiddle.net/lp27vuu4/4/


Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more