使用javascript单击多个div时添加和删除类

Question

I am actually trying to add class (Selected) to the label when clicked and remove Class from neighbour label.

Issue is it doesn't work when there is 2 div, the below code only work on the 1st Div or when i click on the label of the second label, first label active gets removed

 const menuLis = document.querySelectorAll(".top-nav > label"); for (let label of menuLis) { label.addEventListener("click", function(){ // 1. Remove Class from All Lis for (let label of menuLis) { label.classList.remove('selected'); } // 2. Add Class to Relevant Li this.classList.add('selected'); }); }

 .selected{color:red}

 <div class="grid-item"> <section> <div class='top-nav'> <label>Coffee</label> <label>Tea</label> <label>Milk</label> </div> </section> </div> <br><br> <div class="grid-item"> <section> <div class='top-nav'> <label>Coffee</label> <label>Tea</label> <label>Milk</label> </div> </section> </div>

Thanks

Answer 1

You're removing the class from all the items in menuLis . You should get a list of just the labels in the current .top-nav section and remove the class from them.

 const menuLis = document.querySelectorAll(".top-nav > label"); for (let label of menuLis) { label.addEventListener("click", function(){ let container = this.closest('.top-nav'); let curMenuLis = container.querySelectorAll("label"); // 1. Remove Class from All Lis for (let label of curMenuLis) { label.classList.remove('selected'); } // 2. Add Class to Relevant Li this.classList.add('selected'); }); }

 .selected{color:red}

 <div class="grid-item"> <section> <div class='top-nav'> <label>Coffee</label> <label>Tea</label> <label>Milk</label> </div> </section> </div> <br><br> <div class="grid-item"> <section> <div class='top-nav'> <label>Coffee</label> <label>Tea</label> <label>Milk</label> </div> </section> </div>