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https://github.com/vercel-labs/scriptc.git
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Chris Tate
b778bf6e6e
- Compile production IR serialization and runtime dependency scans on both native backends - Support native JSON callbacks and checked records with unknown payloads - Verify native IR round trips and executable generation with focused sanitizer coverage
31 lines
1.3 KiB
TypeScript
31 lines
1.3 KiB
TypeScript
export {};
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const trace: string[] = [];
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const source: unknown = JSON.parse('{"10":10,"2":2,"nested":{"keep":1,"omit":2},"items":[3,4],"empty":{}}');
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const json = JSON.stringify(source, (key: string, value: unknown): unknown => {
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trace.push(key + ":" + typeof value);
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if (key === "omit") return undefined;
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if (typeof value === "number") return value * 10;
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return value;
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}, 2);
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console.log(json);
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console.log(trace.join("|"));
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console.log(JSON.stringify(source));
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// The callback runs on the replacement's children, not on the replaced
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// primitive a second time. A freshly returned record is traversed too.
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console.log(JSON.stringify({ value: 7 }, (key: string, value: unknown): unknown => {
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if (key === "value") return { wrapped: value, missing: undefined };
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return value;
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}));
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// Omission rules differ for an object field, an array element and root.
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function omit(key: string, value: unknown): unknown {
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return key === "1" || key === "drop" ? undefined : value;
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}
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console.log(JSON.stringify({ keep: null, drop: 1, list: [1, 2, 3] }, omit));
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const absent = JSON.stringify({ present: true }, () => undefined);
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console.log(absent === undefined, typeof absent);
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const text = JSON.stringify(12, (_key: string, value: unknown) => value);
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console.log(text === undefined ? "absent" : text.toUpperCase());
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