javascript - How to remove active class from all li elements except one that clicked? -


it doesn't let me complete slider in mind. , want note not use jquery. javascript. tried many ways, didn't take effect.

var ul = document.queryselector('ul');  var dots = [];    (var = 0; < 5; i++) {    var dot = document.createelement('li');    dots.push(dot);    ul.appendchild(dot);  }  dots[2].setattribute('class', 'active');
li {    width: 20px;    height: 20px;    background-color: lightgrey;    text-decoration: none;    display: inline-block;    border-radius: 100%;    margin-right: 15px;  }    .active {    background-color: grey;  }
<ul></ul>

here jsfiddle link: https://jsfiddle.net/heybetov1998/camuyve2/4/

you can hook event handler on dots. within event handler, this refer element on attached handler. can remove class others:

var ul = document.queryselector('ul');  var dots = [];    (var = 0; < 5; i++) {    var dot = document.createelement('li');    dot.addeventlistener("click", clickhandler); // ** hook handler    dots.push(dot);    ul.appendchild(dot);  }  dots[2].setattribute('class', 'active');    // here's handler  function clickhandler() {    var dots = document.queryselectorall("li");    (var n = 0; n < dots.length; ++n) {      if (dots[n] !== this) {        dots[n].classname = "";      }    }    this.classname = "active";  }
li {    width: 20px;    height: 20px;    background-color: lightgrey;    text-decoration: none;    display: inline-block;    border-radius: 100%;    margin-right: 15px;  }    .active {    background-color: grey;  }
<ul></ul>

if need support obsolete browsers don't have addeventlistener, this answer has function doing that.

that's minimal-changes version. there several changes i'd @ making:

  • don't use setattribute set class attribute. fails on old versions of ie, more importantly, replaces classes on element. @ classlist.

  • the example above hooks event handler each dot, if have lot of dots, or add/remove them dynamically, might better off using event delegation hooking handler on container of dots , using e.target determine dot clicked.


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