e976e0cb4b
Add calculator.js with a pure calculate(a, b, operation) engine returning
{result} or {error}, wired to the existing HTML UI via an IIFE. Update
index.html to load the script and CLAUDE.md to document the new module.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
57 lines
1.9 KiB
HTML
57 lines
1.9 KiB
HTML
<!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>Simple Calculator</title>
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<link rel="stylesheet" href="styles.css">
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</head>
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<body>
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<main>
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<h1>Simple Calculator</h1>
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<form id="calculator-form" novalidate>
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<fieldset>
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<legend>Operands</legend>
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<div>
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<label for="operand1">First Number</label>
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<input type="number" id="operand1" name="operand1" step="any" required aria-required="true" autocomplete="off">
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</div>
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<div>
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<label for="operand2">Second Number</label>
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<input type="number" id="operand2" name="operand2" step="any" required aria-required="true" autocomplete="off">
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</div>
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</fieldset>
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<fieldset>
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<legend>Operation</legend>
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<div role="group" aria-label="Select operation">
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<button type="button" name="operation" value="add" aria-pressed="false">Add (+)</button>
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<button type="button" name="operation" value="subtract" aria-pressed="false">Subtract (−)</button>
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<button type="button" name="operation" value="multiply" aria-pressed="false">Multiply (×)</button>
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<button type="button" name="operation" value="divide" aria-pressed="false">Divide (÷)</button>
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</div>
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</fieldset>
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<div>
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<button type="submit" id="calculate-btn">Calculate</button>
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<button type="reset" id="clear-btn">Clear</button>
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</div>
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</form>
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<section aria-live="polite" aria-atomic="true">
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<h2>Result</h2>
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<output id="result" for="operand1 operand2" aria-label="Calculation result"></output>
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</section>
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<section aria-live="assertive" aria-atomic="true">
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<p id="error-message" role="alert" aria-label="Error message"></p>
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</section>
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</main>
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<script src="calculator.js"></script>
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</body>
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</html>
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