mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-21 05:50:55 +08:00
Chris Tate
537ea4d28d
- Support published three.js rotations, bounds, ray intersections, culling, and vertex attributes on native and WASM targets without a JavaScript engine. - Preserve JavaScript class defaults, data descriptors, and captured loop bindings in static code. - Handle typed-array input unions and constructor identities while keeping unsupported method overrides explicit.
57 lines
2.6 KiB
JavaScript
57 lines
2.6 KiB
JavaScript
class Point {
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constructor(x) {
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this.x = x;
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const result = Object.defineProperty(this, 'id', { value: x + 10 });
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console.log(result === this);
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Object.defineProperties(this, {
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label: { value: 'point', enumerable: true, configurable: true, writable: true },
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meta: { value: { count: 1 }, configurable: true },
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});
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}
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}
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class Child extends Point {}
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const point = new Point(2);
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const child = new Child(3);
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console.log(point.id, child.id, point.label, point.meta.count);
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console.log(Object.keys(point).join(','), Object.hasOwn(point, 'id'));
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const id = Object.getOwnPropertyDescriptor(point, 'id');
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console.log(id.value, id.writable, id.enumerable, id.configurable);
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point.meta.count = 4;
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point.label = 'changed';
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console.log(point.meta.count, child.meta.count, point.label);
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try { point.id = 7; } catch (error) { console.log(error instanceof TypeError); }
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try { Object.defineProperty(point, 'id', { value: 9 }); } catch (error) { console.log(error instanceof TypeError); }
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const returned = Object.defineProperties(point, { label: { value: 'final', writable: false } });
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console.log(returned === point, point.label);
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const label = Object.getOwnPropertyDescriptor(point, 'label');
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console.log(label.value, label.writable, label.enumerable, label.configurable);
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/** @param {unknown} value */
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function stringify(value) { return JSON.stringify(value); }
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console.log(stringify(point));
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function read(value) { return value.id + ':' + value.label; }
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console.log(read(point), read(child));
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const empty = Object.getOwnPropertyDescriptor(point, 'missing');
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console.log(empty === undefined);
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const events = [];
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function target() { events.push('target'); return point; }
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function description() { events.push('value'); return 5; }
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Object.defineProperty(target(), 'extra', { value: description(), enumerable: true });
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console.log(events.join(','), point.extra);
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// Snapshot/commit operations must retain nonenumerable descriptors too.
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/** @param {unknown} value */
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function merge(value) { Object.assign(value, { label: 'blocked' }); }
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try { merge(point); } catch (error) { console.log(error instanceof TypeError); }
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console.log(point.id, Object.getOwnPropertyDescriptor(point, 'id').writable);
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/** @param {unknown} value */
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function extend(value) { Object.assign(value, { extra2: 7 }); }
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extend(point);
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console.log(point.extra2, point.id, Object.getOwnPropertyDescriptor(point, 'id').enumerable);
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class Cycle {
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constructor() { this.x = 1; Object.defineProperty(this, 'self', { value: this }); }
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}
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function cycle() {
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const value = new Cycle();
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console.log(value.self === value, Object.keys(value).join(','));
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}
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cycle();
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