Mini Javascript app: QRCode Generator

10 months ago (Edited)

Hello people, I woke up great. And among so many things I am working on, I just feel like creating a simple javascript app. Then QR code generator pinged my mind, and I decided to create one with Html, CSS and Javascript using the qrcode cdn.

Without further ado, let's play.

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400;500;600;700;800&display=swap" rel="stylesheet">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/qrcodejs/1.0.0/qrcode.min.js"></script>
    <link rel="stylesheet" href="style.css">
    <title>QR code Generator</title>
</head>
<body>
<div class="body_wrapper">
    <input type="text" name="" id="inputData" placeholder="Enter a Link or text">
    <div class="options">
        <select class="selOption">
            <option value="100" selected>100 x 100</option>
            <option value="200">200 x 200</option>
            <option value="300">300 x 300</option>
        </select>
        <input type="color" class="sel_color" name="" id="Bgcolor">
        <input type="color" class="sel_color" name="" id="Qcolor">
    </div>
    <div class="boxx">
        <button id="submit" disabled>Generate</button>
    </div>
    <div class="container"> </div>
</div>
    <script src="main.js"></script>
</body>
</html>

CSS

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "poppins";
}

body {
  height: 100vh;
  background: linear-gradient(#f3f3fb 50%, #2ba387 50%);
}

.body_wrapper {
  background-color: #f3f3fb;
  padding: 5em 4em;
  position: absolute;
  width: 31.25em;
  transform: translate(-50%, -50%);
  top: 50%;
  left: 50%;
  border-radius: 0.6em;
  box-shadow: 0 1.5em 3em rgba(3, 21, 55, 0.3);
}

#inputData {
  width: 100%;
  border: none;
  border-bottom: 2px solid #000;
  padding: 0.5em 1em;
  font-size: 1em;
  outline: none;
}

.options {
  display: flex;
  margin-top: 1em;
  align-items: center;
  justify-content: space-around;
}

select {
  appearance: none;
  width: 8em;
  padding: 0.45em 0.9em;
  font-size: 1.25em;
  letter-spacing: 0.2em;
  cursor: pointer;
  background-color: #2ba387;
  border: none;
  color: #000;
  background-image: url();
  background-repeat: no-repeat;
  background-size: 1.1em;
  background-position: 6em;
  outline: none;
}

select::-ms-expand {
  display: none;
}

select option {
  background-color: #f3f3fb;
  color: #2ba387;
  letter-spacing: 0.01em;
  font-weight: 300;
  font-size: 1.0em;
}

.selected {
  display: none;
}

.sel_color {
  background-color: transparent;
  width: 3.1em;
  height: 3.4em;
  outline: none;
  border: none;
}

.sel_color::-webkit-color-swatch {
  border-radius: 0.3em;
  border: 0.18em solid #191f3f;
}

.sel_color::-moz-color-swatch {
  border-radius: 0.3em;
  border: 0.18em solid #191f3f;
}

 .boxx {
  display: flex;
  align-items: center;
  justify-content: space-around;

 }

 .boxx button {
font-size: 1em;
padding: 0.8em 2em;
border-radius: 0.5em;
margin-top: 2em;
background-color: transparent;
color: #2ba387;
border: 0.18em solid #2ba387;
}

.boxx button:disabled {
  background-color: transparent;
  color: #f3f3fb;
  border: 0.18em solid #c6c0c0;
}

.container {
  display: flex;
  justify-content: center;
  margin-top: 0.18em;
}

.keep {
  display: none;
}

JAVASCRIPT

let container = document.querySelector(".container");
const inputData = document.querySelector("#inputData");
const submitButton = document.querySelector("#submit");
const selectOpt = document.querySelector(".selOption");
const bgColor = document.querySelector("#Bgcolor");
const qColor = document.querySelector("#Qcolor");

let  QR_Code;
let qrSize, bgColorChoice, qColorChoice;

// Set size
selectOpt.addEventListener("change", () => {
   qrSize = selectOpt.value;
});

// Set BG color
bgColor.addEventListener("input", () =>{
    bgColorChoice = bgColor.value;
});

//Set QR color
qColor.addEventListener("input", () =>{
    qColorChoice = qColor.value;
});

// Format input
const inputFormat = (value)=> {
    value = value.replace(/[^a-z0-9A-Z]+/g,"");
    return value;
};

submitButton.addEventListener("click", async () => {
    container.innerHTML = " ";
    //QR Generator
    QR_Code = await new QRCode(container, {
        text: inputData.value,
        width: qrSize,
        height: qrSize,
        colorDark: qColorChoice,
        colorLight: bgColorChoice,
    });
});

inputData.addEventListener("input", () => {
    if (inputData.value.trim().length < 1) {
        submitButton.disabled = true;
    } else {
        submitButton.disabled = false;
    }
});

window.onload = () => {
    container.innerHTML = " ";
    qrSize = 100;
    selectOpt.value = 100;
    inputData.value = " ";
    bgColor.value = bgColorChoice = "#ffffff";
    qColor.value = qColorChoice = "#377dff";
    submitButton.disabled = true;
}

You can copy, play with the code and test on your device.

THE RESULT