Astha Nitnaware
1 month ago
parent
9e8dd00f10
commit
c3554037b0
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Bin2Dec Practice App</title>
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<link rel="preconnect" href="https://fonts.googleapis.com" />
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
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<link href="https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&display=swap" rel="stylesheet" />
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<link rel="stylesheet" href="style.css" />
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</head>
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<body>
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<main class="app-shell">
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<section class="card" aria-labelledby="title">
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<p class="eyebrow">CommitVerse Practice</p>
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<h1 id="title">Binary to Decimal Converter</h1>
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<p class="subtitle">Enter a binary number and get its base-10 value.</p>
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<form id="converter-form" novalidate>
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<label for="binary-input">Binary Input</label>
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<input
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id="binary-input"
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name="binary"
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type="text"
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inputmode="numeric"
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maxlength="8"
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placeholder="Example: 10110101"
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aria-describedby="input-hint error-text"
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required
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/>
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<p id="input-hint" class="hint">Up to 8 digits (0 or 1 only)</p>
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<label class="toggle-row" for="allow-variable-length">
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<input id="allow-variable-length" type="checkbox" />
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<span>Bonus mode: allow variable length input</span>
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</label>
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<button type="submit">Convert</button>
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</form>
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<p id="error-text" class="error" role="alert" aria-live="polite"></p>
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<label for="decimal-output">Decimal Output</label>
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<output id="decimal-output" class="output" aria-live="polite">-</output>
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</section>
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</main>
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<script src="script.js"></script>
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</body>
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</html>
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const form = document.getElementById("converter-form");
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const binaryInput = document.getElementById("binary-input");
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const allowVariableLength = document.getElementById("allow-variable-length");
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const errorText = document.getElementById("error-text");
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const decimalOutput = document.getElementById("decimal-output");
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function setError(message) {
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errorText.textContent = message;
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}
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function sanitizeInput(value) {
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return value.trim();
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}
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function isBinaryString(value) {
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return /^[01]+$/.test(value);
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}
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function binaryToDecimal(binaryValue) {
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let decimalValue = 0;
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let positionFromRight = 0;
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for (let i = binaryValue.length - 1; i >= 0; i -= 1) {
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if (binaryValue[i] === "1") {
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decimalValue += Math.pow(2, positionFromRight);
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}
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positionFromRight += 1;
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}
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return decimalValue;
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}
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function validateInput(binaryValue, allowLongInput) {
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if (!binaryValue) {
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return "Please enter a binary number.";
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}
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if (!isBinaryString(binaryValue)) {
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return "Only 0 and 1 are allowed.";
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}
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if (!allowLongInput && binaryValue.length > 8) {
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return "Use up to 8 digits, or enable bonus mode.";
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}
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return "";
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}
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allowVariableLength.addEventListener("change", () => {
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binaryInput.maxLength = allowVariableLength.checked ? 64 : 8;
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setError("");
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});
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form.addEventListener("submit", (event) => {
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event.preventDefault();
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setError("");
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const binaryValue = sanitizeInput(binaryInput.value);
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const validationMessage = validateInput(binaryValue, allowVariableLength.checked);
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if (validationMessage) {
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decimalOutput.textContent = "-";
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setError(validationMessage);
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return;
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}
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const result = binaryToDecimal(binaryValue);
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decimalOutput.textContent = String(result);
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});
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@ -0,0 +1,157 @@
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:root {
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--bg-a: #fbf3ea;
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--bg-b: #d6efe2;
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--card-bg: rgba(255, 255, 255, 0.82);
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--text-main: #1f2937;
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--text-muted: #5b6878;
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--accent: #006d77;
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--accent-strong: #00545c;
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--danger: #bf1f2f;
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--ring: rgba(0, 109, 119, 0.28);
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}
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* {
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box-sizing: border-box;
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}
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body {
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margin: 0;
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min-height: 100vh;
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font-family: "Space Grotesk", sans-serif;
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color: var(--text-main);
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background:
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radial-gradient(circle at 12% 20%, rgba(250, 173, 20, 0.2), transparent 42%),
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radial-gradient(circle at 82% 15%, rgba(0, 109, 119, 0.23), transparent 36%),
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linear-gradient(145deg, var(--bg-a), var(--bg-b));
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display: grid;
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place-items: center;
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padding: 24px;
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}
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.app-shell {
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width: min(640px, 100%);
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}
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.card {
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border-radius: 24px;
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padding: 28px;
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background: var(--card-bg);
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border: 1px solid rgba(255, 255, 255, 0.65);
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backdrop-filter: blur(8px);
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box-shadow: 0 24px 60px rgba(18, 38, 63, 0.18);
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animation: rise-in 420ms ease-out;
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}
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.eyebrow {
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margin: 0;
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font-weight: 700;
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text-transform: uppercase;
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letter-spacing: 0.08em;
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color: var(--accent);
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font-size: 0.76rem;
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}
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h1 {
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margin: 10px 0 6px;
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font-size: clamp(1.5rem, 3.2vw, 2rem);
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}
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.subtitle {
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margin: 0 0 18px;
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color: var(--text-muted);
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}
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form {
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display: grid;
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gap: 10px;
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}
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label {
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font-weight: 600;
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}
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input[type="text"] {
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width: 100%;
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border: 1px solid rgba(31, 41, 55, 0.26);
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border-radius: 12px;
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padding: 11px 12px;
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font: inherit;
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transition: border-color 160ms ease, box-shadow 160ms ease;
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}
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input[type="text"]:focus {
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outline: none;
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border-color: var(--accent);
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box-shadow: 0 0 0 4px var(--ring);
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}
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.hint {
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margin: 0 0 6px;
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color: var(--text-muted);
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font-size: 0.9rem;
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}
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.toggle-row {
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display: flex;
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align-items: center;
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gap: 8px;
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font-size: 0.92rem;
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font-weight: 500;
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color: var(--text-muted);
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margin: 2px 0 8px;
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}
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button {
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border: none;
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border-radius: 12px;
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padding: 12px;
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font: inherit;
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font-weight: 700;
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background: var(--accent);
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color: #fff;
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cursor: pointer;
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transition: transform 140ms ease, background-color 140ms ease;
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}
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button:hover {
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background: var(--accent-strong);
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transform: translateY(-1px);
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}
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.error {
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min-height: 1.4em;
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margin: 14px 0 8px;
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color: var(--danger);
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font-weight: 600;
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}
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.output {
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display: block;
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width: 100%;
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margin-top: 8px;
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border: 1px dashed rgba(31, 41, 55, 0.35);
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background: rgba(255, 255, 255, 0.7);
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border-radius: 12px;
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padding: 12px;
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font-size: 1.15rem;
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font-weight: 700;
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min-height: 50px;
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}
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@keyframes rise-in {
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from {
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opacity: 0;
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transform: translateY(14px) scale(0.985);
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}
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to {
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opacity: 1;
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transform: translateY(0) scale(1);
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}
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}
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@media (max-width: 640px) {
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.card {
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padding: 22px;
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border-radius: 18px;
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}
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}
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