import MagicString from 'magic-string'; import { magic_string_preprocessor_result } from '../../helpers'; export default { js_map_sources: ['input.svelte'], preprocess: [ { script: ({ content }) => { const src = new MagicString(content); src.prepend('console.log("Injected first line");\n'); return magic_string_preprocessor_result('input.svelte', src); } } ] };