4.7 Further reading and sources of this chapter

Environments and the global object in the ECMAScript specification:

• Section “Lexical Environments” provides a general overview over environments.
• Section “Global Environment Records” covers the global environment.
• Section “ECMAScript Standard Built-in Objects” describes how ECMAScript manages its built-in objects (which include the global object).

globalThis:

• 2ality post “ES feature: globalThis”
• Various ways of accessing the global this value: “A horrifying globalThis polyfill in universal JavaScript” by Mathias Bynens

The global object in browsers:

• Background on what happens in browsers: “Defining the WindowProxy, Window, and Location objects” by Anne van Kesteren
• Very technical: section “Realms, settings objects, and global objects” in the WHATWG HTML standard
• In the ECMAScript specification, we can see how web browsers customize global this: section “InitializeHostDefinedRealm()”