Module boa_engine::module

Boa’s implementation of the ECMAScript’s module system.

This module contains the Module type, which represents an Abstract Module Record, a ModuleLoader trait for custom module loader implementations, and SimpleModuleLoader, the default ModuleLoader for Context which can be used for most simple usecases.

Every module roughly follows the same lifecycle:

• Parse using Module::parse.
• Load all its dependencies using Module::load.
• Link its dependencies together using Module::link.
• Evaluate the module and its dependencies using Module::evaluate.

The ModuleLoader trait allows customizing the “load” step on the lifecycle of a module, which allows doing things like fetching modules from urls, having multiple “modpaths” from where to import modules, or using Rust futures to avoid blocking the main thread on loads.

More information:

• ECMAScript reference

Structs

• IdleModuleLoader
  A module loader that throws when trying to load any modules.
• Module
  ECMAScript’s Abstract module record.
• ModuleNamespace
  Module namespace exotic object.
• SimpleModuleLoader
  A simple module loader that loads modules relative to a root path.
• SyntheticModule
  ECMAScript’s Synthetic Module Records.
• SyntheticModuleInitializer
  The initializing steps of a SyntheticModule.

Enums

• Referrer
  The referrer from which a load request of a module originates.

Traits

• ModuleLoader
  Module loading related host hooks.