@sebastianwessel/quickjs/dist/esm/sandbox/syncVersion/getModuleLoader.js

A typescript package to execute JavaScript and TypeScript code in a WebAssembly QuickJS sandbox

import { join } from 'node:path';
export const getModuleLoader = (fs, _runtimeOptions) => {
    const moduleLoader = (inputName, _context) => {
        let name = inputName;
        // if it does not exist
        if (!fs.existsSync(name)) {
            // try to add the .js extension
            if (fs.existsSync(`${name}.js`)) {
                name = `${name}.js`;
            }
            else {
                return { error: new Error(`Module '${inputName}' not installed or available`) };
            }
        }
        // if it is a folder, we need to use the index.js file
        if (fs.lstatSync(name).isDirectory()) {
            name = join(name, 'index.js');
            if (!fs.existsSync(name)) {
                return { error: new Error(`Module '${inputName}' not installed or available`) };
            }
        }
        // workaround: as we can not provide the real import.meta.url functionality, we replace it dynamically with the current value string
        const value = fs.readFileSync(name)?.toString().replaceAll('import.meta.url', `'file://${name}'`);
        if (!value) {
            return { error: new Error(`Module '${name}' not installed or available`) };
        }
        return { value };
    };
    return moduleLoader;
};