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Antenna calculator: harden wavelength/MHz input handlers.

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Clear stale results when wavelength is emptied or invalid, and reject
non-finite overflow values so NaN is never displayed or persisted.
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Roland 2026-07-15 19:53:38 -06:00 • committed by lrnselfreliance
parent 2fbf0a9b0f
commit ef6d470f52
1 changed files with 15 additions and 2 deletions
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17
app/src/components/calculators/HamCalculators.js
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@ -217,18 +217,31 @@ export function DipoleAntennaCalculator() {
const handleMhzChange = (e, {value}) => {
setMhzInputValue(value);
const parsed = parseFloat(value);
setMhz(value && parsed > 0 ? parsed : 0);
// Require a finite positive frequency so overflow (e.g. 1e999 → Infinity) does not stick.
setMhz(value && Number.isFinite(parsed) && parsed > 0 ? parsed : 0);
localStorage.setItem(mhzStorageKey, value);
}
const handleWaveChange = (e, {value}) => {
setWaveInputValue(value);
const parsed = parseFloat(value);
if (value && parsed > 0) {
if (value && Number.isFinite(parsed) && parsed > 0) {
const newMhz = frequencyMhzFromWavelengthMeters(parsed);
if (newMhz === null) {
// Conversion failed (should not happen for finite positive λ); treat as invalid.
setMhz(0);
setMhzInputValue('');
localStorage.setItem(mhzStorageKey, '');
return;
}
setMhz(newMhz);
setMhzInputValue(roundDigits(newMhz));
localStorage.setItem(mhzStorageKey, String(roundDigits(newMhz)));
} else {
// Cleared / zero / non-finite wavelength: drop stale MHz and table results.
setMhz(0);
setMhzInputValue('');
localStorage.setItem(mhzStorageKey, '');
}
}