mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-21 05:50:55 +08:00
Chris Tate
a07998f667
* Expand static three.js workflows and host integration * Preserve JavaScript class state in static three.js workflows * Preserve inferred JavaScript behavior across static workflows * Preserve inferred callables and native compatibility boundaries * Retain annotated JavaScript factory exports and bootstrap-safe call spreads * Preserve Buffer and child callback identities in static packages * Clarify JavaScript symbol spread support
40 lines
2.0 KiB
JavaScript
40 lines
2.0 KiB
JavaScript
const events = [];
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const target = (a, b) => a + b;
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target.label = "sum";
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const handler = {
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apply(fn, receiver, values) {
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events.push(this === handler, fn === target, receiver === undefined, values.join(","));
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return values[0] * values[1];
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},
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get(fn, key) { return key === "label" ? "product" : Reflect.get(fn, key); },
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};
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const proxy = new Proxy(target, handler);
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console.log(typeof proxy, typeof proxy === "function", typeof proxy === "object", proxy.label, proxy(3, 4), events.join("|"));
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handler.apply = undefined;
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console.log(proxy(3, 4));
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/** @param {(a: number, b: number) => number} fn */
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function callChecked(fn) { return fn(2, 5); }
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console.log(callChecked(proxy));
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/** @param {(a: number, b: number) => number} fn */
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function checkedIdentity(fn) { return fn; }
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const again = checkedIdentity(proxy);
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console.log(again === proxy, again.label, again(2, 5));
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class FunctionState {
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constructor() { this.options = { value: 1 }; }
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configure(options) { this.options.value = options.value; return this; }
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once(value = null) { this.options.value = value; return this; }
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async onceAsync(value = null) { this.options.value = value; return this; }
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}
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const state = new FunctionState();
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const configured = new Proxy(target, { get(fn, key, receiver) { return Reflect.get(state, key, receiver); } });
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const preserved = checkedIdentity(configured);
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console.log(preserved.configure({ value: 9 }) === configured, preserved.options.value);
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console.log(preserved.once() === configured, preserved.options.value);
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console.log(preserved.once(7) === configured, state.options.value);
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console.log(await preserved.onceAsync(8) === configured, state.options.value);
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const other = new Proxy(target, { apply(fn, receiver, values) { return receiver.base + values[0]; } });
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const owner = { base: 10, other };
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console.log(owner.other(5));
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try { new Proxy(target, { apply: 1 })(2, 3); } catch (error) { console.log(error.name); }
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try { new Proxy(target, { apply() { throw new Error("trap"); } })(); } catch (error) { console.log(error.message); }
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