Function toDynamicImport

lib/repl.js:251–270

(codeLine)

// Converts static import statement to dynamic import statement
const toDynamicImport = (codeLine) => {
  let dynamicImportStatement = '';
  const ast = acornParse(codeLine, { __proto__: null, sourceType: 'module', ecmaVersion: 'latest' });
  acornWalk.ancestor(ast, {
    ImportDeclaration(node) {
      const awaitDynamicImport = `await import(${JSONStringify(node.source.value)});`;
      if (node.specifiers.length === 0) {
        dynamicImportStatement += awaitDynamicImport;
      } else if (node.specifiers.length === 1 && node.specifiers[0].type === 'ImportNamespaceSpecifier') {
        dynamicImportStatement += `const ${node.specifiers[0].local.name} = ${awaitDynamicImport}`;
      } else {
        const importNames = ArrayPrototypeJoin(ArrayPrototypeMap(node.specifiers, ({ local, imported }) =>
          (local.name === imported?.name ? local.name : `${imported?.name ?? 'default'}: ${local.name}`),
        ), ', ');
        dynamicImportStatement += `const { ${importNames} } = ${awaitDynamicImport}`;
      }
    },
  });
  return dynamicImportStatement;
};

class Recoverable extends SyntaxError {
  constructor(err) {