How to Make Tab using HTML, CSS, and JavaScript?

Here you will learn how to make a simple Tab using pure HTML, CSS, and JavaScript.

Click on the button below to see a demo of the tab we’re going to create here –

HTML code for the Tab

<div class="tab-container">
    <ul class="tab-labels" role="tablist">
        <li class="tab-label" role="tab">Tab 1</li>
        <li class="tab-label" role="tab">Tab 2</li>
        <li class="tab-label" role="tab">Tab 3</li>
    </ul>
    <div class="tab-content">
        <div class="tab-panel" role="tabpanel">
            Tab 1 content...
        </div>
        <div class="tab-panel" role="tabpanel">
            Tab 2 content...
        </div>
        <div class="tab-panel" role="tabpanel">
            Tab 3 content...
        </div>
    </div>
</div>

CSS Code for the Tab

@import url("https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap");
*,
*::before,
*::after {
    box-sizing: border-box;
    line-height: 1.5em;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background-color: #f7f7f7;
    color: #222222;
    padding: 20px;
}

body,
input,
button {
    font-family: "Open Sans", sans-serif;
    font-size: 1rem;
}

.tab-container {
    background: #fff;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border-radius: 3px;
    padding: 30px;
}
.tab-container .tab-labels {
    padding: 0;
    margin: 0;
}
.tab-container .tab-labels .tab-label {
    position: relative;
    display: inline-block;
    list-style: none;
    padding: 1em 2em 0.5em;
    padding: 15px;
    border: 1px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    outline: none;
    font-weight: 700;
    text-transform: uppercase;
}
.tab-container .tab-labels .tab-label.active {
    border-color: #ccc;
    border-bottom: 1px solid #fff;
    color: #ff8a00;
}
.tab-container .tab-labels .tab-label:hover {
    color: #ff8a00;
}
.tab-container .tab-panel {
    display: none;
}
.tab-container .tab-panel.active {
    display: block;
    border-top: 1px solid #ccc;
}

JavaScript code for the Tab

const tabLabels = document.querySelectorAll(".tab-label");
const tabPanels = document.querySelectorAll(".tab-panel");

function activate_the_tab(target_i) {
    if (tabLabels.length === tabPanels.length) {
        for (let i = 0; i < tabLabels.length; i++) {
            if (i === target_i) {
                tabLabels[i].classList.add("active");
                tabPanels[i].classList.add("active");
            } else {
                tabLabels[i].classList.remove("active");
                tabPanels[i].classList.remove("active");
            }
        }
    }
}
activate_the_tab(0);

function on_tab_click(e, i) {
    activate_the_tab(i);
}

tabLabels.forEach((item, i) => {
    item.addEventListener("click", (e) => on_tab_click(e, i));
});