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21
public/calculators/bandwidth.js
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21
public/calculators/bandwidth.js
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import {fmt, revive, persist, labelInput, labelSelect} from '/js/util.js';
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export default {
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id:'bandwidth', name:'Bandwidth / Bytes Converter', about:'Convert bits↔bytes and SI↔IEC units',
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render(root){
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const key='calc_bandwidth_v1';
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const s = revive(key,{value:100, unit:'Mbps'});
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const units = ['bps','Kbps','Mbps','Gbps','Tbps','B/s','KB/s','MB/s','GB/s','TB/s','KiB/s','MiB/s','GiB/s','TiB/s'];
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const factors = {'bps':1,'Kbps':1e3,'Mbps':1e6,'Gbps':1e9,'Tbps':1e12,'B/s':8,'KB/s':8e3,'MB/s':8e6,'GB/s':8e9,'TB/s':8e12,'KiB/s':8*1024,'MiB/s':8*1024**2,'GiB/s':8*1024**3,'TiB/s':8*1024**4};
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const ui = document.createElement('div');
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ui.append(labelInput('Value','number','value', s.value,{step:'0.000001',min:'0'}), labelSelect('Unit','unit', s.unit, units.map(u=>[u,u])));
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const out = document.createElement('div'); out.className='result'; ui.append(out);
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function calc(){
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const v = +ui.querySelector('[name=value]').value||0;
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const unit = ui.querySelector('[name=unit]').value;
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const bps = v * factors[unit];
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out.innerHTML = units.map(u=>`<div><strong>${u}</strong>: ${fmt.format(bps / factors[u])}</div>`).join('');
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persist(key,{value:v, unit});
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}
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ui.addEventListener('input', calc); calc(); root.append(ui);
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}
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}
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399
public/calculators/currency.js
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399
public/calculators/currency.js
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import {revive, persist, labelInput, labelSelect} from '/js/util.js';
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export default {
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id:'currency', name:'Currency Converter', about:'Convert between currencies using real-time exchange rates.',
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render(root){
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const key='calc_currency_v1';
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const s = revive(key,{amount:100, from:'USD', to:'EUR', manualRate: null});
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const ui = document.createElement('div');
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// Popular currencies with better formatting
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const currencies = [
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['USD', 'US Dollar'],
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['EUR', 'Euro'],
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['GBP', 'British Pound'],
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['JPY', 'Japanese Yen'],
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['CAD', 'Canadian Dollar'],
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['AUD', 'Australian Dollar'],
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['CHF', 'Swiss Franc'],
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['CNY', 'Chinese Yuan'],
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['INR', 'Indian Rupee'],
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['BRL', 'Brazilian Real']
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];
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// Create a more user-friendly form layout
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const formContainer = document.createElement('div');
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formContainer.style.cssText = `
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 15px;
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margin-bottom: 20px;
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`;
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// Amount input (full width)
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const amountDiv = document.createElement('div');
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amountDiv.style.gridColumn = '1 / -1';
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amountDiv.innerHTML = `
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<label style="display: block; margin-bottom: 8px; font-weight: 500; color: var(--text);">
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Amount to Convert
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</label>
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<input type="number" name="amount" value="${s.amount}" step="0.01" min="0"
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style="width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 16px;"
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placeholder="Enter amount">
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`;
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// From currency (left column) - using Select Lite
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const fromDiv = document.createElement('div');
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fromDiv.innerHTML = `
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<label style="display: block; margin-bottom: 8px; font-weight: 500; color: var(--text);">
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From Currency
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</label>
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<select name="from" data-ui="lite" style="width: 100%;">
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${currencies.map(([code, name]) =>
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`<option value="${code}" ${code === s.from ? 'selected' : ''}>${code} - ${name}</option>`
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).join('')}
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</select>
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`;
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// To currency (right column) - using Select Lite
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const toDiv = document.createElement('div');
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toDiv.innerHTML = `
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<label style="display: block; margin-bottom: 8px; font-weight: 500; color: var(--text);">
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To Currency
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</label>
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<select name="to" data-ui="lite" style="width: 100%;">
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${currencies.map(([code, name]) =>
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`<option value="${code}" ${code === s.to ? 'selected' : ''}>${code} - ${name}</option>`
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).join('')}
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</select>
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`;
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formContainer.append(amountDiv, fromDiv, toDiv);
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ui.append(formContainer);
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// Manual rate input option
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const manualRateDiv = document.createElement('div');
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manualRateDiv.innerHTML = `
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<div style="margin: 15px 0; padding: 15px; border: 1px solid var(--border); border-radius: 8px; background: var(--k-bg);">
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<label style="display: block; margin-bottom: 8px; font-weight: 500; color: var(--text);">
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Custom Rate (Optional)
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</label>
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<input type="number" name="manualRate" placeholder="Enter custom conversion rate" step="0.0001" min="0"
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style="width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;">
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<div style="font-size: 12px; color: var(--muted); margin-top: 8px; line-height: 1.4;">
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<strong>Format:</strong> 1 ${s.from} = X ${s.to}<br>
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<strong>Example:</strong> If 1 USD = 0.85 EUR, enter 0.85<br>
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<strong>Leave empty</strong> to use current market rates
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</div>
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</div>
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`;
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ui.append(manualRateDiv);
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// Fetch rates button with better styling
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const fetchBtn = document.createElement('button');
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fetchBtn.type = 'button';
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fetchBtn.textContent = 'Update Exchange Rates';
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fetchBtn.className = 'btn';
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fetchBtn.style.cssText = `
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width: 100%;
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padding: 12px;
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margin: 15px 0;
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font-size: 16px;
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font-weight: 500;
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background: var(--accent);
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color: white;
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border: none;
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border-radius: 8px;
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cursor: pointer;
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transition: background 0.2s;
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`;
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fetchBtn.addEventListener('mouseenter', () => fetchBtn.style.background = 'var(--accent-hover)');
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fetchBtn.addEventListener('mouseleave', () => fetchBtn.style.background = 'var(--accent)');
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ui.append(fetchBtn);
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const out = document.createElement('div');
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out.className = 'result';
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out.style.cssText = `
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margin: 20px 0;
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padding: 15px;
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background: var(--k-bg);
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border-radius: 8px;
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border-left: 4px solid var(--accent);
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`;
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ui.append(out);
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const status = document.createElement('div');
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status.className='status';
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ui.append(status);
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// Static rates from today (2025-09-01) - no prefetching
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const staticRates = {
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USD: 1,
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EUR: 0.856,
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GBP: 0.741,
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JPY: 147.15,
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CAD: 1.37,
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AUD: 1.53,
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CHF: 0.801,
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CNY: 7.13,
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INR: 88.19,
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BRL: 5.43
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};
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let rates = staticRates;
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let lastFetch = 0;
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const CACHE_DURATION = 5 * 60 * 1000; // 5 minutes
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// Function to get current static rate for currency pair
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function getCurrentStaticRate(from, to) {
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if (from === to) return 1;
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if (rates && rates[from] && rates[to]) {
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return rates[to] / rates[from];
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}
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return null;
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}
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// Function to update custom rate with current static rate
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function updateCustomRateWithStatic() {
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const from = ui.querySelector('[name=from]').value;
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const to = ui.querySelector('[name=to]').value;
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const staticRate = getCurrentStaticRate(from, to);
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if (staticRate !== null) {
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const manualRateInput = ui.querySelector('[name=manualRate]');
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// Update manual rate to current market rate when fetching new rates
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manualRateInput.value = staticRate.toFixed(4);
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manualRateInput.placeholder = `Current rate: ${staticRate.toFixed(4)}`;
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// Trigger calculation with the new rates
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calc();
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}
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}
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async function fetchRates(){
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const now = Date.now();
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if (rates && (now - lastFetch) < CACHE_DURATION) {
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status.textContent = 'Using cached rates (updated within 5 minutes)';
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status.className = 'status success';
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status.style.display = 'block';
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setTimeout(() => {
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status.textContent = '';
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status.style.display = 'none';
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}, 3000);
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return rates;
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}
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try {
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status.textContent = 'Fetching latest exchange rates...';
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status.className = 'status loading';
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const response = await fetch('https://api.exchangerate-api.com/v4/latest/USD');
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if (!response.ok) throw new Error('Failed to fetch rates');
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const data = await response.json();
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rates = data.rates;
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rates.USD = 1; // Base currency
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lastFetch = now;
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status.textContent = 'Rates updated successfully!';
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status.className = 'status success';
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status.style.display = 'block';
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setTimeout(() => {
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status.textContent = '';
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status.style.display = 'none';
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}, 1500);
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// Update custom rate with new rates and recalculate
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updateCustomRateWithStatic();
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return rates;
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} catch (error) {
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console.error('Failed to fetch exchange rates:', error);
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status.textContent = 'Failed to fetch rates. Using static rates from today.';
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status.className = 'status error';
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// Keep using static rates
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return rates;
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}
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}
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function calc(){
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const amount = +ui.querySelector('[name=amount]').value || 0;
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const from = ui.querySelector('[name=from]').value;
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const to = ui.querySelector('[name=to]').value;
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const manualRate = +ui.querySelector('[name=manualRate]').value || null;
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console.log('Calc function called with:', { amount, from, to, manualRate });
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if (amount <= 0) {
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out.innerHTML = '<div class="muted">Enter a positive amount to convert</div>';
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return;
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}
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if (from === to) {
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out.innerHTML = `
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<div style="font-size: 18px; font-weight: 600; color: var(--text);">
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${amount.toFixed(2)} ${from}
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</div>
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<div style="color: var(--muted); margin-top: 5px;">
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Same currency - no conversion needed
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</div>
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`;
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return;
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}
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let conversionRate;
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let rateSource;
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let rateDate;
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if (manualRate && manualRate > 0) {
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console.log('Using manual rate:', manualRate);
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// Use manual rate
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conversionRate = manualRate;
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// Determine if this is user-entered or default custom rate
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const staticRate = staticRates[to] / staticRates[from];
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const isUserEntered = Math.abs(manualRate - staticRate) > 0.0001; // Allow for floating point precision
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rateSource = isUserEntered ? 'Custom rate' : 'Static rates';
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rateDate = isUserEntered ? 'Manual input' : '2025-09-01';
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out.innerHTML = `
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<div style="font-size: 24px; font-weight: 700; color: var(--accent); margin-bottom: 10px;">
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${(amount * conversionRate).toFixed(2)} ${to}
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</div>
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<div style="color: var(--text); margin-bottom: 5px;">
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<strong>Conversion:</strong> ${amount} ${from} × ${conversionRate.toFixed(4)} = ${(amount * conversionRate).toFixed(2)} ${to}
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</div>
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<div style="color: var(--muted); font-size: 14px;">
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<strong>Rate:</strong> 1 ${from} = ${conversionRate.toFixed(4)} ${to}<br>
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<strong>Source:</strong> ${rateSource}<br>
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<strong>Date:</strong> ${rateDate}
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</div>
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`;
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} else if (rates) {
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console.log('Using market rates, manual rate was:', manualRate);
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// Use fetched or static rates (fallback when no manual rate)
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conversionRate = rates[to] / rates[from];
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rateSource = lastFetch > 0 ? 'Live rates' : 'Static rates';
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rateDate = lastFetch > 0 ? new Date(lastFetch).toLocaleString() : '2025-09-01';
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out.innerHTML = `
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<div style="font-size: 24px; font-weight: 700; color: var(--accent); margin-bottom: 10px;">
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${(amount * conversionRate).toFixed(2)} ${to}
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</div>
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<div style="color: var(--text); margin-bottom: 5px;">
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<strong>Conversion:</strong> ${amount} ${from} × ${conversionRate.toFixed(4)} = ${(amount * conversionRate).toFixed(2)} ${to}
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</div>
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<div style="color: var(--muted); font-size: 14px;">
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<strong>Rate:</strong> 1 ${from} = ${conversionRate.toFixed(4)} ${to}<br>
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<strong>Rate:</strong> 1 ${to} = ${(1/conversionRate).toFixed(4)} ${from}<br>
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<strong>Source:</strong> ${rateSource}<br>
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<strong>Rates accurate as of:</strong> ${rateDate}
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</div>
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`;
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} else {
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out.innerHTML = '<div class="muted">Unable to calculate conversion</div>';
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return;
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}
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persist(key, {amount, from, to, manualRate});
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}
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// Manual rate input handler
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const manualRateInput = manualRateDiv.querySelector('[name="manualRate"]');
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manualRateInput.value = s.manualRate || '';
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// Debug logging
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console.log('Setting up manual rate input handler');
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// Set up the event listener
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manualRateInput.addEventListener('input', (e) => {
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console.log('Manual rate input event fired:', e.target.value);
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// Clear any existing status messages
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status.textContent = '';
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status.style.display = 'none';
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// Update the stored manual rate
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s.manualRate = +e.target.value || null;
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console.log('Updated manual rate to:', s.manualRate);
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// Simple test - just update the display immediately
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if (s.manualRate && s.manualRate > 0) {
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const amount = +ui.querySelector('[name=amount]').value || 0;
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const from = ui.querySelector('[name=from]').value;
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const to = ui.querySelector('[name=to]').value;
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console.log('Immediate calculation test:', { amount, from, to, manualRate: s.manualRate });
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// Determine if this is user-entered or default custom rate
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const staticRate = staticRates[to] / staticRates[from];
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const isUserEntered = Math.abs(s.manualRate - staticRate) > 0.0001; // Allow for floating point precision
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const rateSource = isUserEntered ? 'Custom rate' : 'Static rates';
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// Show immediate result
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out.innerHTML = `
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<div style="font-size: 24px; font-weight: 700; color: var(--accent); margin-bottom: 10px;">
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${(amount * s.manualRate).toFixed(2)} ${to}
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</div>
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<div style="color: var(--text); margin-bottom: 5px;">
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<strong>Conversion:</strong> ${amount} ${from} × ${s.manualRate.toFixed(4)} = ${(amount * s.manualRate).toFixed(2)} ${to}
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</div>
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<div style="color: var(--muted); font-size: 14px;">
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<strong>Rate:</strong> 1 ${from} = ${s.manualRate.toFixed(4)} ${to}<br>
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<strong>Source:</strong> ${rateSource}
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</div>
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`;
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} else {
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// Fall back to normal calculation
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calc();
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}
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});
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// Also add change event as backup
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manualRateInput.addEventListener('change', (e) => {
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console.log('Manual rate change event fired:', e.target.value);
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s.manualRate = +e.target.value || null;
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calc();
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});
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// Currency change handlers
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const fromSelect = fromDiv.querySelector('[name=from]');
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const toSelect = toDiv.querySelector('[name=to]');
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fromSelect.addEventListener('change', () => {
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s.from = fromSelect.value;
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// Update manual rate description and custom rate
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const desc = manualRateDiv.querySelector('div');
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desc.innerHTML = desc.innerHTML.replace(/1 [A-Z]{3} = X [A-Z]{3}/, `1 ${s.from} = X ${s.to}`);
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updateCustomRateWithStatic();
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calc();
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});
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toSelect.addEventListener('change', () => {
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s.to = toSelect.value;
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||||
// Update manual rate description and custom rate
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const desc = manualRateDiv.querySelector('div');
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desc.innerHTML = desc.innerHTML.replace(/1 [A-Z]{3} = X [A-Z]{3}/, `1 ${s.from} = X ${s.to}`);
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updateCustomRateWithStatic();
|
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calc();
|
||||
});
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||||
|
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// Amount input handler
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const amountInput = amountDiv.querySelector('[name="amount"]');
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amountInput.addEventListener('input', calc);
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|
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// Fetch rates button click handler
|
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fetchBtn.addEventListener('click', async () => {
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await fetchRates();
|
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calc(); // Recalculate with new rates
|
||||
});
|
||||
|
||||
// Initialize custom rate with current static rate
|
||||
updateCustomRateWithStatic();
|
||||
|
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// Initial calculation
|
||||
calc();
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||||
root.append(ui);
|
||||
}
|
||||
}
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50
public/calculators/interest.js
Normal file
50
public/calculators/interest.js
Normal file
|
|
@ -0,0 +1,50 @@
|
|||
import {currency, revive, persist, labelInput, labelSelect} from '/js/util.js';
|
||||
export default {
|
||||
id:'interest', name:'Interest (Simple & Compound)', about:'Compute simple or compound interest with flexible compounding and contributions.',
|
||||
render(root){
|
||||
const key='calc_interest_v1';
|
||||
const s = revive(key,{principal:1000, rate:5, years:3, compound:'12', contrib:0, contribFreq:'12'});
|
||||
const ui = document.createElement('div');
|
||||
ui.append(
|
||||
labelInput('Principal','number','principal', s.principal,{step:'0.01',min:'0'}),
|
||||
labelInput('Annual rate (%)','number','rate', s.rate,{step:'0.0001',min:'0'}),
|
||||
labelSelect('Compounding','compound', s.compound, [['1','Yearly'],['4','Quarterly'],['12','Monthly'],['365','Daily'],['0','Simple (no compounding)']]),
|
||||
labelInput('Years','number','years', s.years,{step:'0.1',min:'0'}),
|
||||
labelInput('Recurring contribution (per period below)','number','contrib', s.contrib,{step:'0.01',min:'0'}),
|
||||
labelSelect('Contribution frequency','contribFreq', s.contribFreq, [['1','Yearly'],['4','Quarterly'],['12','Monthly']])
|
||||
);
|
||||
const out = document.createElement('div'); out.className='result'; ui.append(out);
|
||||
|
||||
function calc(){
|
||||
const P = +ui.querySelector('[name=principal]').value||0;
|
||||
const r = (+ui.querySelector('[name=rate]').value||0)/100;
|
||||
const years = +ui.querySelector('[name=years]').value||0;
|
||||
const n = +ui.querySelector('[name=compound]').value; // 0 => simple
|
||||
const A = +ui.querySelector('[name=contrib]').value||0;
|
||||
const f = +ui.querySelector('[name=contribFreq]').value||1;
|
||||
|
||||
let future=0, interest=0;
|
||||
if(n===0){
|
||||
interest = P * r * years;
|
||||
const contribs = A * f * years;
|
||||
future = P + interest + contribs;
|
||||
}else{
|
||||
const periods = n * years;
|
||||
const i = r / n;
|
||||
future = P * Math.pow(1+i, periods);
|
||||
if(A>0){
|
||||
const eff = Math.pow(1+i, n/f) - 1;
|
||||
const m = Math.round(periods * f / n);
|
||||
future += A * ((Math.pow(1+eff, m) - 1) / eff);
|
||||
}
|
||||
interest = future - P - (A>0?A*Math.round(n*years * f / n):0);
|
||||
}
|
||||
out.innerHTML = `
|
||||
<div><strong>Future value:</strong> ${currency(future)}</div>
|
||||
<div class="muted">Estimated interest earned: ${currency(Math.max(0,interest))}</div>
|
||||
`;
|
||||
persist(key,{principal:P, rate:r*100, years, compound:String(n), contrib:A, contribFreq:String(f)});
|
||||
}
|
||||
ui.addEventListener('input', calc); calc(); root.append(ui);
|
||||
}
|
||||
}
|
||||
22
public/calculators/nmea.js
Normal file
22
public/calculators/nmea.js
Normal file
|
|
@ -0,0 +1,22 @@
|
|||
import {revive, persist, labelInput} from '/js/util.js';
|
||||
export default {
|
||||
id:'nmea', name:'NMEA 0183 Checksum', about:'Paste without the leading $ and without *XX.',
|
||||
render(root){
|
||||
const key='calc_nmea_v1';
|
||||
const s = revive(key,{sentence:'GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,', expected:''});
|
||||
const ui = document.createElement('div');
|
||||
ui.append(labelInput('Sentence (no $ and no *XX)','text','sentence', s.sentence), labelInput('Expected checksum (optional, hex)','text','expected', s.expected,{placeholder:'e.g. 47'}));
|
||||
const out = document.createElement('div'); out.className='result'; ui.append(out);
|
||||
function checksum(str){ let x=0; for(const ch of str) x ^= ch.charCodeAt(0); return x; }
|
||||
function calc(){
|
||||
const sentence = ui.querySelector('[name=sentence]').value.trim();
|
||||
const exp = ui.querySelector('[name=expected]').value.trim();
|
||||
const sum = checksum(sentence);
|
||||
const hex = sum.toString(16).toUpperCase().padStart(2,'0');
|
||||
let html = `<div><strong>Computed:</strong> <code class="k">*${hex}</code></div>`;
|
||||
if(exp){ const ok = hex === exp.toUpperCase(); html += `<div>${ok ? 'Match' : 'Mismatch'} (expected <code class="k">*${exp.toUpperCase()}</code>)</div>`; }
|
||||
out.innerHTML = html; persist(key,{sentence, expected:exp});
|
||||
}
|
||||
ui.addEventListener('input', calc); calc(); root.append(ui);
|
||||
}
|
||||
}
|
||||
32
public/calculators/raid.js
Normal file
32
public/calculators/raid.js
Normal file
|
|
@ -0,0 +1,32 @@
|
|||
import {fmt, revive, persist, labelInput, labelSelect} from '/js/util.js';
|
||||
export default {
|
||||
id:'raid', name:'RAID Usable Capacity', about:'Estimates only; assumes identical drives. Controller/FS overhead not included.',
|
||||
render(root){
|
||||
const key='calc_raid_v1';
|
||||
const s = revive(key,{level:'5', drives:6, size:18});
|
||||
const ui = document.createElement('div');
|
||||
ui.append(
|
||||
labelSelect('RAID level','level', s.level, [['0','RAID 0 (stripe)'],['1','RAID 1 (mirror)'],['5','RAID 5 (1 disk parity)'],['6','RAID 6 (2 disk parity)'],['10','RAID 10 (mirror+stripe)']]),
|
||||
labelInput('Number of drives','number','drives', s.drives,{min:'1',step:'1'}),
|
||||
labelInput('Drive size (TB, decimal)','number','size', s.size,{min:'0',step:'0.01'})
|
||||
);
|
||||
const out = document.createElement('div'); out.className='result'; ui.append(out);
|
||||
|
||||
function calc(){
|
||||
const L = ui.querySelector('[name=level]').value;
|
||||
const N = Math.max(1, parseInt(ui.querySelector('[name=drives]').value||0,10));
|
||||
const S = (+ui.querySelector('[name=size]').value||0) * 1e12;
|
||||
let usable=0, ft='';
|
||||
if(L==='0'){ usable = N*S; ft='0 disk'; }
|
||||
else if(L==='1'){ usable = Math.floor(N/2)*S; ft='can lose all but 1 in each mirror pair'; }
|
||||
else if(L==='5'){ usable = (N-1)*S; ft='1 disk'; }
|
||||
else if(L==='6'){ usable = (N-2)*S; ft='2 disks'; }
|
||||
else if(L==='10'){ usable = Math.floor(N/2)*S; ft='1 disk per mirror pair'; }
|
||||
const teb = usable / (1024**4);
|
||||
const tb = usable / 1e12;
|
||||
out.innerHTML = `<div><strong>Usable:</strong> ${fmt.format(tb)} TB · ${fmt.format(teb)} TiB</div><div class="muted">Fault tolerance: ${ft}</div>`;
|
||||
persist(key,{level:L, drives:N, size:+ui.querySelector('[name=size]').value});
|
||||
}
|
||||
ui.addEventListener('input', calc); calc(); root.append(ui);
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue