Add class everyone to everyone btn and replace sort-hold member to class name instead of id
Fix #member to be .member
#sort-box { width: 100%; } #button-wrap { width: 100%; display: flex; } .sort-button { flex: 1; margin-right: 10px; width: 100%; display: block; border: none; background: #eee; outline: none; border-radius: none; height: 40px; resize: none; text-align: center; font-family: arial; font-size: 10px; line-height: 40px; text-transform: uppercase; } .active, .sort-button:hover { background: #fde676; } #search { margin-right: 0px; text-align: left; padding: 0px 10px; flex: 1.5; } .sort-hold { width: 100%; background: #eee; margin-top: 10px; padding: 5px 0px; } .member { margin: 10px; width: calc(100% - 70px); height: 50px; line-height: 50px; padding: 0px 25px; text-transform: uppercase; font-family: arial; background: #fff; font-size: 10px; outline: 1px solid #ddd; outline-offset: -1px; } // Get the container element var btnWrap = document.getElementById("button-wrap"); // Get all buttons with class="btn" inside the container var btns = btnWrap.getElementsByClassName("sort-button"); // Loop through the buttons and add the active class to the current/clicked button for (var i = 0; i < btns.length; i++) { btns[i].addEventListener("click", function() { var current = document.getElementsByClassName("active"); current[0].className = current[0].className.replace(" active", ""); this.className += " active"; }); } $("#everyone").click(sortEveryone); function sortEveryone() { console.log("button clicked!") $(".member").show(); } // add activeBtn function for all btns except .everyone for (var btn of btns) { $(btn).hasClass("everyone") == false ? btn.addEventListener("click", activeBtn) : ""; } function activeBtn(e) { let targetId = e.target.id; let members = $(".member"); // if the member class has the same name as the btn id, show it else hide it for (var member of members) { $(member).hasClass(targetId) ? $(member).show() : $(member).hide(); } } And I have addadded .everyone for everyone btn to make it more easier to handelhandle.