JavaScript Project - Modal Box

In this tutorial, we will learn how to create a Modal Box with HTML, CSS, and JavaScript.

A modal is a dialog box/popup window that is displayed on top of the current page.

We are going to use vanilla JavaScript to develop this Modal Box.

JavaScript Modal Box

Create a folder called modal as project workspace and we will create all the project files inside this folder.

1. index.html

Let's create index.html and add the following code to it:

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Modal</title> <!-- font-awesome --> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.14.0/css/all.min.css" /> <!-- styles --> <link rel="stylesheet" href="style.css" /> </head> <body> <!-- hero --> <header class="hero"> <div class="banner"> <h1>modal project</h1> <button class="btn modal-btn"> open modal </button> </div> </header> <!-- modal --> <div class="modal-overlay"> <div class="modal-container"> <h3>modal content</h3> <button class="close-btn"><i class="fas fa-times"></i></button> </div> </div> <!-- javascript --> <script src="script.js"></script> </body> </html>

2. script.js

Let's create a JavaScript file named script.js and add the following JavaScript code to it:

// select modal-btn,modal-overlay,close-btn // listen for click events on modal-btn and close-btn // when user clicks modal-btn add .open-modal to modal-overlay // when user clicks close-btn remove .open-modal from modal-overlay const modalBtn = document.querySelector(".modal-btn"); const modal = document.querySelector(".modal-overlay"); const closeBtn = document.querySelector(".close-btn"); modalBtn.addEventListener("click", function () { modal.classList.add("open-modal"); }); closeBtn.addEventListener("click", function () { modal.classList.remove("open-modal"); });

3. style.css

Let's create a CSS file named style.css and add the following CSS code to it:

/* ===============  Fonts =============== */ @import url("https://fonts.googleapis.com/css?family=Open+Sans|Roboto:400,700&display=swap"); /* ===============  Variables =============== */ :root { /* dark shades of primary color*/ --clr-primary-1: hsl(205, 86%, 17%); --clr-primary-2: hsl(205, 77%, 27%); --clr-primary-3: hsl(205, 72%, 37%); --clr-primary-4: hsl(205, 63%, 48%); /* primary/main color */ --clr-primary-5: #49a6e9; /* --clr-primary-5: rgb(73, 166, 233); */ /* lighter shades of primary color */ --clr-primary-6: hsl(205, 89%, 70%); --clr-primary-7: hsl(205, 90%, 76%); --clr-primary-8: hsl(205, 86%, 81%); --clr-primary-9: hsl(205, 90%, 88%); --clr-primary-10: hsl(205, 100%, 96%); /* darkest grey - used for headings */ --clr-grey-1: hsl(209, 61%, 16%); --clr-grey-2: hsl(211, 39%, 23%); --clr-grey-3: hsl(209, 34%, 30%); --clr-grey-4: hsl(209, 28%, 39%); /* grey used for paragraphs */ --clr-grey-5: hsl(210, 22%, 49%); --clr-grey-6: hsl(209, 23%, 60%); --clr-grey-7: hsl(211, 27%, 70%); --clr-grey-8: hsl(210, 31%, 80%); --clr-grey-9: hsl(212, 33%, 89%); --clr-grey-10: hsl(210, 36%, 96%); --clr-white: #fff; --clr-red-dark: hsl(360, 67%, 44%); --clr-red-light: hsl(360, 71%, 66%); --clr-green-dark: hsl(125, 67%, 44%); --clr-green-light: hsl(125, 71%, 66%); --clr-black: #222; --ff-primary: "Roboto", sans-serif; --ff-secondary: "Open Sans", sans-serif; --transition: all 0.3s linear; --spacing: 0.25rem; --radius: 0.5rem; --light-shadow: 0 5px 15px rgba(0, 0, 0, 0.1); --dark-shadow: 0 5px 15px rgba(0, 0, 0, 0.2); --max-width: 1170px; --fixed-width: 620px; } /* ===============  Global Styles =============== */ *, ::after, ::before { margin: 0; padding: 0; box-sizing: border-box; } body { font-family: var(--ff-secondary); background: var(--clr-grey-10); color: var(--clr-grey-1); line-height: 1.5; font-size: 0.875rem; } ul { list-style-type: none; } a { text-decoration: none; } img:not(.logo) { width: 100%; } img { display: block; } h1, h2, h3, h4 { letter-spacing: var(--spacing); text-transform: capitalize; line-height: 1.25; margin-bottom: 0.75rem; font-family: var(--ff-primary); } h1 { font-size: 3rem; } h2 { font-size: 2rem; } h3 { font-size: 1.25rem; } h4 { font-size: 0.875rem; } p { margin-bottom: 1.25rem; color: var(--clr-grey-5); } @media screen and (min-width: 800px) { h1 { font-size: 4rem; } h2 { font-size: 2.5rem; } h3 { font-size: 1.75rem; } h4 { font-size: 1rem; } body { font-size: 1rem; } h1, h2, h3, h4 { line-height: 1; } } /* global classes */ .btn { text-transform: uppercase; background: transparent; color: var(--clr-black); padding: 0.375rem 0.75rem; letter-spacing: var(--spacing); display: inline-block; transition: var(--transition); font-size: 0.875rem; border: 2px solid var(--clr-black); cursor: pointer; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); border-radius: var(--radius); } .btn:hover { color: var(--clr-white); background: var(--clr-black); } /* section */ .section { padding: 5rem 0; } .section-center { width: 90vw; margin: 0 auto; max-width: 1170px; } @media screen and (min-width: 992px) { .section-center { width: 95vw; } } main { min-height: 100vh; display: grid; place-items: center; } /* ===============  Modal =============== */ .hero { min-height: 100vh; background: url("./hero.jpeg") center/cover no-repeat; display: grid; place-items: center; } .banner { background: var(--clr-white); padding: 4rem 0; border-radius: var(--radius); box-shadow: var(--light-shadow); text-align: center; width: 90vw; max-width: var(--fixed-width); } .modal-btn { margin-top: 2rem; background: var(--clr-primary-5); border-color: var(--clr-primary-5); color: var(--clr-white); } .modal-btn:hover { background: transparent; color: var(--clr-primary-5); } .modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(73, 166, 233, 0.5); display: grid; place-items: center; transition: var(--transition); visibility: hidden; z-index: -10; } /* OPEN/CLOSE MODAL */ .open-modal { visibility: visible; z-index: 10; } .modal-container { background: var(--clr-white); border-radius: var(--radius); width: 90vw; height: 30vh; max-width: var(--fixed-width); text-align: center; display: grid; place-items: center; position: relative; } .close-btn { position: absolute; top: 1rem; right: 1rem; font-size: 2rem; background: transparent; border-color: transparent; color: var(--clr-red-dark); cursor: pointer; transition: var(--transition); } .close-btn:hover { color: var(--clr-red-light); transform: scale(1.3); }

Open index.html in Browser

Let's open the index.html file in the browser and you will be able to see the following screen:

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