Add currency and percentage input plugins to mortgage calculator
- Currency inputs auto-format with thousand separators on input - Only allows numeric characters (strips letters, symbols, etc.) - .val() returns raw integer for calculations - Percentage inputs allow only numbers and one decimal point - Select all on focus for easy replacement - Maintains cursor position while typing - Real-time sync between down payment dollar and percent fields 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Hanson.xyz Dev
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@@ -47,7 +47,7 @@ $bg_style = $hero_bg ? 'style="background-image: url(' . esc_url($hero_bg) . ');
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<label for="home-price">Home Price</label>
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<div class="input-wrapper input-currency">
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<span class="input-prefix">$</span>
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<input type="text" id="home-price" name="home-price" value="250,000" inputmode="numeric">
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<input type="text" id="home-price" name="home-price" value="250000" inputmode="numeric">
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</div>
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</div>
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@@ -56,7 +56,7 @@ $bg_style = $hero_bg ? 'style="background-image: url(' . esc_url($hero_bg) . ');
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<div class="input-row">
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<div class="input-wrapper input-currency">
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<span class="input-prefix">$</span>
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<input type="text" id="down-payment" name="down-payment" value="50,000" inputmode="numeric">
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<input type="text" id="down-payment" name="down-payment" value="50000" inputmode="numeric">
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</div>
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<div class="input-wrapper input-percent">
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<input type="text" id="down-payment-percent" name="down-payment-percent" value="20" inputmode="decimal">
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@@ -9,6 +9,178 @@
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if (!$('.mortgage-calculator-main').length) return;
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// ============================================
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// Currency Input Plugin
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// ============================================
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let _hasInitCurrencyInput = false;
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$.fn.currencyInput = function(show_symbol = true) {
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let $that = this;
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$that.data('ci_show_symbol', show_symbol);
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// Override $.fn.val once globally
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if (!_hasInitCurrencyInput) {
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_hasInitCurrencyInput = true;
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$.fn._CIOriginalVal = $.fn.val;
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$.fn.val = function(value) {
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if ($(this).data("_currencyInput")) {
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if (arguments.length === 0) {
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// Getter - return raw integer
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var raw = $(this)._CIOriginalVal();
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if (raw == '') {
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return '';
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}
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var number = parseInt(raw.replace(/[^0-9]/g, ''));
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return number;
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} else {
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// Setter - format and display
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value = String(value).replace(/[^0-9]/g, '');
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if (value != '') {
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var formatted = parseInt(value).toLocaleString('en-US', {
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style: 'currency',
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currency: 'USD',
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minimumFractionDigits: 0,
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maximumFractionDigits: 0
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});
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if (!$(this).data('ci_show_symbol')) {
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formatted = formatted.replace("$", "");
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}
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return $(this)._CIOriginalVal(formatted);
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}
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return $(this)._CIOriginalVal(value);
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}
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} else if ($(this).data("_percentInput")) {
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if (arguments.length === 0) {
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// Getter - return raw float
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var raw = $(this)._CIOriginalVal();
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if (raw == '') {
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return '';
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}
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var number = parseFloat(raw.replace(/[^0-9.]/g, ''));
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return isNaN(number) ? '' : number;
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} else {
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// Setter - clean and display
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value = String(value).replace(/[^0-9.]/g, '');
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// Ensure only one decimal point
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var parts = value.split('.');
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if (parts.length > 2) {
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value = parts[0] + '.' + parts.slice(1).join('');
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}
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return $(this)._CIOriginalVal(value);
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}
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} else {
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// Default behavior for other inputs
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if (arguments.length === 0) {
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return $(this)._CIOriginalVal();
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} else {
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return $(this)._CIOriginalVal(value);
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}
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}
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};
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}
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// Skip if already initialized
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if (this.data("_currencyInput")) {
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return this;
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}
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this.data("_currencyInput", true);
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// Select all on focus
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this.on('focus', function() {
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$(this).select();
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});
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// Format on input, maintain cursor position
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this.on('input', function(event) {
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var cursorPos = this.selectionStart;
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var val = $(this)._CIOriginalVal();
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var lengthBefore = val.length;
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// Setting with .val() applies formatting
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$(this).val(val);
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var lengthAfter = $(this)._CIOriginalVal().length;
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// Adjust cursor position based on length change
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if (lengthAfter > lengthBefore) {
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cursorPos += (lengthAfter - lengthBefore);
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} else if (lengthAfter < lengthBefore) {
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cursorPos -= (lengthBefore - lengthAfter);
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}
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this.setSelectionRange(cursorPos, cursorPos);
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// Clear input when backspace leaves only one digit
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if (this.value.replace(/[^0-9]/g, '').length === 1 && event.originalEvent && event.originalEvent.inputType === "deleteContentBackward") {
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$(this)._CIOriginalVal('');
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}
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});
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// Initialize display from current value
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$(this).val($(this)._CIOriginalVal());
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return this;
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};
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// ============================================
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// Percentage Input Plugin
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// ============================================
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$.fn.percentInput = function() {
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// Skip if already initialized
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if (this.data("_percentInput")) {
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return this;
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}
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this.data("_percentInput", true);
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// Select all on focus
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this.on('focus', function() {
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$(this).select();
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});
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// Clean on input - only allow numbers and one decimal point
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this.on('input', function(event) {
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var cursorPos = this.selectionStart;
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var val = $(this)._CIOriginalVal();
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var lengthBefore = val.length;
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// Remove any character that isn't a number or period
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var cleaned = val.replace(/[^0-9.]/g, '');
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// Ensure only one decimal point
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var parts = cleaned.split('.');
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if (parts.length > 2) {
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cleaned = parts[0] + '.' + parts.slice(1).join('');
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}
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$(this)._CIOriginalVal(cleaned);
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var lengthAfter = cleaned.length;
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// Adjust cursor position based on length change
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if (lengthAfter < lengthBefore) {
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cursorPos -= (lengthBefore - lengthAfter);
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}
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if (cursorPos < 0) cursorPos = 0;
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this.setSelectionRange(cursorPos, cursorPos);
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});
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return this;
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};
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// ============================================
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// Mortgage Calculator
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// ============================================
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var MortgageCalculator = {
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init: function() {
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this.$form = $('#mortgage-calculator-form');
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@@ -22,6 +194,12 @@
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this.$loanAmount = $('#loan-amount');
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this.$totalInterest = $('#total-interest');
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// Initialize input plugins
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this.$homePrice.currencyInput(false);
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this.$downPayment.currencyInput(false);
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this.$downPaymentPercent.percentInput();
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this.$interestRate.percentInput();
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this.bindEvents();
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this.calculate();
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},
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@@ -29,88 +207,69 @@
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bindEvents: function() {
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var self = this;
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// Format inputs on blur
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this.$homePrice.on('blur', function() {
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self.formatCurrency($(this));
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// Sync down payment when home price changes
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this.$homePrice.on('input', function() {
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self.syncDownPaymentFromPercent();
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self.calculate();
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});
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this.$downPayment.on('blur', function() {
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self.formatCurrency($(this));
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// Sync percentage when down payment dollar amount changes
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this.$downPayment.on('input', function() {
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self.syncDownPaymentPercent();
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self.calculate();
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});
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this.$downPaymentPercent.on('blur', function() {
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// Sync dollar amount when percentage changes
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this.$downPaymentPercent.on('input', function() {
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self.syncDownPaymentFromPercent();
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self.calculate();
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});
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this.$interestRate.on('blur', function() {
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// Calculate on interest rate change
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this.$interestRate.on('input', function() {
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self.calculate();
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});
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// Calculate on loan term change
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this.$loanTerm.on('change', function() {
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self.calculate();
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});
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// Calculate on input (debounced)
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var debounceTimer;
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this.$form.find('input').on('input', function() {
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clearTimeout(debounceTimer);
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debounceTimer = setTimeout(function() {
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self.calculate();
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}, 300);
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});
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// Prevent form submission
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this.$form.on('submit', function(e) {
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e.preventDefault();
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});
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},
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parseNumber: function(value) {
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if (typeof value === 'number') return value;
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return parseFloat(value.replace(/[^0-9.-]/g, '')) || 0;
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},
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formatCurrency: function($input) {
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var value = this.parseNumber($input.val());
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if (value > 0) {
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$input.val(value.toLocaleString('en-US', { maximumFractionDigits: 0 }));
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}
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},
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formatCurrencyDisplay: function(value) {
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return '$' + value.toLocaleString('en-US', { maximumFractionDigits: 0 });
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return '$' + Math.round(value).toLocaleString('en-US');
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},
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syncDownPaymentPercent: function() {
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var homePrice = this.parseNumber(this.$homePrice.val());
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var downPayment = this.parseNumber(this.$downPayment.val());
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var homePrice = this.$homePrice.val();
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var downPayment = this.$downPayment.val();
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if (homePrice > 0) {
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if (homePrice && homePrice > 0) {
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var percent = (downPayment / homePrice) * 100;
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this.$downPaymentPercent.val(percent.toFixed(1));
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this.$downPaymentPercent._CIOriginalVal(percent.toFixed(1));
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}
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},
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syncDownPaymentFromPercent: function() {
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var homePrice = this.parseNumber(this.$homePrice.val());
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var percent = this.parseNumber(this.$downPaymentPercent.val());
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var homePrice = this.$homePrice.val();
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var percent = this.$downPaymentPercent.val();
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if (homePrice > 0 && percent >= 0) {
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var downPayment = (homePrice * percent) / 100;
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this.$downPayment.val(downPayment.toLocaleString('en-US', { maximumFractionDigits: 0 }));
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if (homePrice && homePrice > 0 && percent !== '' && percent >= 0) {
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var downPayment = Math.round((homePrice * percent) / 100);
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this.$downPayment.val(downPayment);
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}
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},
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calculate: function() {
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var homePrice = this.parseNumber(this.$homePrice.val());
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var downPayment = this.parseNumber(this.$downPayment.val());
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var homePrice = this.$homePrice.val() || 0;
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var downPayment = this.$downPayment.val() || 0;
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var loanTerm = parseInt(this.$loanTerm.val(), 10);
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var annualRate = this.parseNumber(this.$interestRate.val());
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var annualRate = this.$interestRate.val() || 0;
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// Calculate loan amount
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var loanAmount = homePrice - downPayment;
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@@ -134,10 +293,10 @@
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}
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// Update display
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this.$monthlyPayment.text(this.formatCurrencyDisplay(Math.round(monthlyPayment)));
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this.$principalInterest.text(this.formatCurrencyDisplay(Math.round(monthlyPayment)));
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this.$loanAmount.text(this.formatCurrencyDisplay(Math.round(loanAmount)));
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this.$totalInterest.text(this.formatCurrencyDisplay(Math.round(totalInterest)));
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this.$monthlyPayment.text(this.formatCurrencyDisplay(monthlyPayment));
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this.$principalInterest.text(this.formatCurrencyDisplay(monthlyPayment));
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this.$loanAmount.text(this.formatCurrencyDisplay(loanAmount));
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this.$totalInterest.text(this.formatCurrencyDisplay(totalInterest));
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}
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};
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@@ -161,6 +161,10 @@
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font-size: 0.875rem;
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color: var(--color-text-muted);
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margin-bottom: 0.5rem;
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@media (min-width: 1024px) {
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font-size: 1.4rem;
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}
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}
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.result-value {
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@@ -173,6 +177,10 @@
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@media (max-width: 640px) {
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font-size: 2rem;
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}
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@media (min-width: 1024px) {
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font-size: 3.125rem;
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}
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}
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}
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