javascript - Translate an image slider coded in jQuery to pure JS -


i found tutorial image slider made jquery. wanting recreate same exact functionality in pure js, facing problems translating functionality of animate function of jquery pure js.

here code it. (the problem facing opacity shifting)

html: (from tutorial)

<!doctype html> <html>   <head>     <title>jquery slider demo</title>     <script src="jquery-2.1.3.min.js"  type="text/javascript" ></script>     <script type="text/javascript" src="script.js"></script>     <link rel="stylesheet" type="text/css" href="style.css">   </head>   <body>     <div class="slides">       <img src="img/1.jpg" />       <img src="img/2.jpg" />       <img src="img/3.jpg" />       <img src="img/4.jpg" />     </div>   </body> </html>

js (from tutorial):

$(function(){   // initalizing first image class 'top'   $('.slides img:first').addclass('top');   //function alter image index changing class   var change = function (){     var curr = $('.slides img.top');     var next = curr.next();       // if next image not available      // set class-top first image     // vanish current image     // show previous next image     if(!next.length){        next = $('.slides img:first');       next.addclass('top');        curr.animate({opacity: 0.0},1000, function() {         curr.removeclass('top');         curr.css({opacity: 1.0});       });      }else{        // pick next image       // set opacity 0       // den use animation make appear       // above top image       next.css({opacity: 0.0})         .addclass('top')         .animate({opacity: 1.0}, 1000, function() {         curr.removeclass('top');       });     }   }    // repeat function execution every 3 secs   setinterval(change, 3000 );   });

what have far: 

(function(){    var list = document.getelementsbytagname('img');    (var i=0; i<list.length; i++ ) {     list[i].addeventlistener('transitionend', function(){       this.style.opacity = "1";       this.classlist.remove('top');     })   };    list[0].classlist.add('top');    var change = function () {     var curr = document.queryselector('img.top');     var next = curr.nextelementsibling;      if(next == undefined) {       next = list[0]       next.classlist.add('top');       curr.style.opacity = "0";     }      else {       curr.style.opacity = "0";       console.log('i working')       next.classlist.add('top');     }   }    setinterval(change,3000);  })();

as mentionned in comment below question, best way have nice fading effect, without jquery, css.

function slider(){      var list = document.getelementsbytagname('img');      list[0].classlist.add('top');      var change = function () {      console.log('i working');          var curr = document.queryselector('img.top');      var next = curr.nextelementsibling;        if(next == undefined) {        next = list[0]      }            curr.classlist.remove('top');      next.classlist.add('top');    }      setinterval(change,3000);  }
.slides img {      /* demo slider run slider... */    position:absolute;    top:0;    left:0;    width:100%;        /* css fading */    -webkit-transition: 1s linear;    opacity: 0;  }  .slides img.top {    opacity: 1;  }
<body onload="slider();">    <div class="slides">      <img src="https://lorempixel.com/400/200/sports/image 1" />      <img src="https://lorempixel.com/400/200/sports/image 2" />      <img src="https://lorempixel.com/400/200/sports/image 3" />      <img src="https://lorempixel.com/400/200/sports/image 4" />    </div>  </body>

codepen


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more