Function writeBundle

vite.config.ts:36–66

(options)

    return {
        name: 'extract-css',
        writeBundle(options) {
            if (hasExtracted || !options.dir) {
                return Promise.resolve();
            }

            const promises: Promise<void>[] = [];
            
            for (const [filename, [css, selector]] of Object.entries(files)) {
                const hash = String(css());
                const extractedCss = extractCss();
                const contents = extractedCss
                    .slice(lastExtractedLength)
                    .replaceAll(hash, selector);

                const path = resolve(options.dir, 'themes');

                promises.push(new Promise(async (res) => {
                    if (!await existsSync(path)) {
                        await mkdir(path);
                    }

                    res(writeFile(resolve(path, filename), contents));
                }));

                lastExtractedLength = extractedCss.length;
            }

            hasExtracted = true;

            return Promise.all(promises).then();
        }
    };
}