mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-02 00:25:34 +08:00
Chris Tate
2a23ddc37d
- Compile production program loading across module graphs, packages, and configuration - Preserve optional defaults and support runtime URL bases and regex split captures - Isolate host execution services and initialize lowering tables outside module cycles
33 lines
1.3 KiB
TypeScript
33 lines
1.3 KiB
TypeScript
function extensions(file: string, values: string[]): string[] {
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const out: string[] = [];
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for (const extension of values) out.push(file.replace(/\.(js|mjs|cjs)$/, extension));
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return out;
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}
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console.log(extensions("entry.js", [".ts", ".tsx", ".mts", ".cts"]).join(","));
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console.log(extensions("entry.json", [".ts", ".mts"]).join(","));
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function optional(index: number): void {
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// Unchecked array reads can yield undefined despite a string checker
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// type. RegExp's replacement conversion consumes that actual value.
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const values = ["$&-$`-$'", ""];
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const value = values[index];
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console.log("left right left".replace(/left/, value));
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console.log("left right left".replace(/left/g, value));
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console.log("left right left".replaceAll(/left/g, value));
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console.log("unchanged".replace(/missing/, value));
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}
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optional(0);
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optional(1);
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optional(2);
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const templates = ["$1", "$2$1", "$$", "$<word>"];
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for (const template of templates) {
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console.log("ab ab".replace(/(?<word>a)(b)/g, template));
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console.log("😀a😀".replace(/(?:)/gu, template));
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}
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let order = "";
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function receiver(): string { order += "receiver;"; return "abc"; }
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function pattern(): RegExp { order += "pattern;"; return /b/; }
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function replacement(): string[] { order += "replacement;"; return []; }
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console.log(receiver().replace(pattern(), replacement()[0]), order);
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