Hello friends, today I will tell you through experts php tutorial how you can create QR Code generator using JavaScript code. So let’s try to understand step to step with example.
Step 1:- First of all copy html code and past your file.
qrcode.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>QR Code Generator</title> </head> <body> <div class="user-input-section"> <section class="heading"> <div class="title">QRcodes</div> <div class="sub-title">Generate QRCode for anything!</div> </section> <section class="user-input"> <input type="text" placeholder="Type something..." name="input_text" id="input_text" autocomplete="off"> <button class="button" type="submit">Generate<i class="fa-solid fa-rotate"></i></button> </section> </div> <div class="qr-code-container"> <div class="qr-code" style></div> </div> </body> </html>
CSS Code Create
$primary-color: #2b303a;
$secondary-color: #eee5e9;
$tertiary-color: #7c7c7c;
$qr-code: #7c7c7c33;
$button-color: #92dce5;
:root {
font-size: 62.5%;
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
text-size-adjust: none;
-webkit-text-size-adjust: none;
}
button:hover {
cursor: pointer;
}
body {
display: flex;
align-items: center;
justify-content: center;
background-color: #eae6e5;
background-color: $primary-color;
height: 100vh;
@media screen and (max-width: 50em) {
flex-direction: column;
height: 100%;
}
.heading {
margin: 3rem 0 5rem 0;
}
.title,
.sub-title {
font-size: 4rem;
text-align: center;
font-family: "Poppins", sans-serif;
color: #12130f;
color: $secondary-color;
}
.sub-title {
font-size: 1.5rem;
color: $secondary-color;
opacity: 0.5;
}
.user-input-section {
display: flex;
flex-direction: column;
align-items: center;
width: 40%;
@media screen and (max-width: 50em) {
width: 100%;
margin: 2rem 0 0 0;
}
.user-input {
display: flex;
flex-direction: column;
align-items: center;
width: 100%;
label {
text-align: center;
font-size: 1.5rem;
font-family: "Poppins", sans-serif;
}
input {
width: 80%;
max-width: 35rem;
font-family: "Poppins", sans-serif;
outline: none;
border: none;
border-radius: 0.5rem;
background-color: #9b8774ad;
background-color: $tertiary-color;
text-align: center;
padding: 1.5rem 1rem;
margin: 1rem 1rem 2rem 1rem;
color: black;
&::placeholder {
color: $secondary-color;
color: $primary-color;
}
}
}
}
.button {
outline: none;
border: none;
border-radius: 0.5rem;
padding: 1.5rem 2.5rem;
margin-bottom: 3rem;
background-color: #5b92799d;
background-color: $button-color;
color: black;
font-family: "Nunito", sans-serif;
font-size: 1.6rem;
i {
margin-left: 1rem;
}
}
.qr-code-container {
display: flex;
justify-content: center;
align-items: center;
width: 40%;
@media screen and (max-width: 50em) {
width: 100%;
margin: 8rem 0;
}
.qr-code {
display: flex;
border-radius: 1rem;
background-color: $qr-code;
width: fit-content;
flex-direction: column;
justify-content: space-between;
padding: 2rem;
button {
display: flex;
justify-content: center;
background-color: #1f1f1f;
color: #eae6e5;
border: none;
outline: none;
width: 100%;
margin-top: 2.5rem;
border-radius: 1rem;
a {
font-family: "Poppins", sans-serif;
font-size: 1.5rem;
width: 100%;
height: 100%;
text-decoration: none;
color: #eae6e5;
padding: 1rem;
i {
margin-left: 0.5rem;
}
}
}
}
}
}
JavaScript Code
let btn = document.querySelector(".button");
let qr_code_element = document.querySelector(".qr-code");
btn.addEventListener("click", () => {
let user_input = document.querySelector("#input_text");
if (user_input.value != "") {
if (qr_code_element.childElementCount == 0) {
generate(user_input);
} else {
qr_code_element.innerHTML = "";
generate(user_input);
}
} else {
console.log("not valid input");
qr_code_element.style = "display: none";
}
});
function generate(user_input) {
qr_code_element.style = "";
var qrcode = new QRCode(qr_code_element, {
text: `${user_input.value}`,
width: 180, //128
height: 180,
colorDark: "#000000",
colorLight: "#ffffff",
correctLevel: QRCode.CorrectLevel.H
});
let download = document.createElement("button");
qr_code_element.appendChild(download);
let download_link = document.createElement("a");
download_link.setAttribute("download", "qr_code.png");
download_link.innerHTML = `Download <i class="fa-solid fa-download"></i>`;
download.appendChild(download_link);
let qr_code_img = document.querySelector(".qr-code img");
let qr_code_canvas = document.querySelector("canvas");
if (qr_code_img.getAttribute("src") == null) {
setTimeout(() => {
download_link.setAttribute("href", `${qr_code_canvas.toDataURL()}`);
}, 300);
} else {
setTimeout(() => {
download_link.setAttribute("href", `${qr_code_img.getAttribute("src")}`);
}, 300);
}
}