Function createContext

lib/vm.js:226–267

(contextObject = { __proto__: ObjectPrototype }, options = kEmptyObject)

let defaultContextNameIndex = 1;
function createContext(contextObject = { __proto__: ObjectPrototype }, options = kEmptyObject) {
  if (contextObject !== vm_context_no_contextify && isContext(contextObject)) {
    return contextObject;
  }

  validateObject(options, 'options');

  const {
    name = `VM Context ${defaultContextNameIndex++}`,
    origin,
    codeGeneration,
    microtaskMode,
    importModuleDynamically,
  } = options;

  validateString(name, 'options.name');
  if (origin !== undefined)
    validateString(origin, 'options.origin');
  if (codeGeneration !== undefined)
    validateObject(codeGeneration, 'options.codeGeneration');

  let strings = true;
  let wasm = true;
  if (codeGeneration !== undefined) {
    ({ strings = true, wasm = true } = codeGeneration);
    validateBoolean(strings, 'options.codeGeneration.strings');
    validateBoolean(wasm, 'options.codeGeneration.wasm');
  }

  validateOneOf(microtaskMode,
                'options.microtaskMode',
                ['afterEvaluate', undefined]);
  const microtaskQueue = (microtaskMode === 'afterEvaluate');

  const hostDefinedOptionId =
    getHostDefinedOptionId(importModuleDynamically, name);

  const result = makeContext(contextObject, name, origin, strings, wasm, microtaskQueue, hostDefinedOptionId);
  // Register the context scope callback after the context was initialized.
  registerImportModuleDynamically(result, importModuleDynamically);
  return result;
}

function createScript(code, options) {
  return new Script(code, options);