29 lines
850 B
JavaScript
29 lines
850 B
JavaScript
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/**
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* Per-page view-state persistence — survives navigation within the app.
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* Exposed as window.ViewState. No modules, no deps.
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*
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* Each page stores its last-loaded inputs + data under
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* localStorage["optionsPricer:view:<page>"] so navigating away and back
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* restores the page exactly as it was.
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*/
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(function () {
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"use strict";
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const PREFIX = "optionsPricer:view:";
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window.ViewState = {
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PREFIX,
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load(page) {
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try {
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const raw = localStorage.getItem(PREFIX + page);
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return raw ? JSON.parse(raw) : null;
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} catch { return null; }
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},
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save(page, data) {
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try { localStorage.setItem(PREFIX + page, JSON.stringify(data)); }
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catch (e) { console.warn("[ViewState] save failed:", e); }
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},
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clear(page) {
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try { localStorage.removeItem(PREFIX + page); } catch {}
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},
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};
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})();
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