@vant/cli/lib/compiler/compile-css.js

Vant CLI is a tool for building vue component library. You can quickly build a full-featured Vue component library with vant-cli.

import postcss from 'postcss';
import postcssrc from 'postcss-load-config';
import { transform } from 'esbuild';
import { POSTCSS_CONFIG_FILE } from '../common/constant.js';
export async function compileCss(source) {
    const config = await postcssrc({}, POSTCSS_CONFIG_FILE);
    const { css } = await postcss(config.plugins).process(source, {
        from: undefined,
    });
    const result = await transform(css, {
        loader: 'css',
        minify: true,
        target: ['chrome53', 'safari10'],
    });
    return result.code;
}