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https://github.com/electron/electron.git
synced 2026-10-28 11:44:46 +08:00
Samuel Attard
7d3cf33e1a
Sandboxed renderers and service worker preload realms ran a webpack bundle
(sandbox_bundle / preload_realm_bundle) that built the preload scripts'
`process` object and `require`, assembled the `electron` module from the
JavaScript API wrappers, registered the <webview> element and then compiled
and ran each preload script. With the API modules now provided by their
bindings, the rest moves to C++ (shell/renderer/preload_environment.cc):
- `process` is a native EventEmitter carrying the same properties as
before, plus getProcessMemoryInfo(); 'loaded', 'exit', 'document-start'
and 'document-end' are emitted on it directly.
- `require('electron')` returns a module object whose properties load their
binding on first access.
- Preload scripts are compiled with CreatePreloadScript() and called with
(require, process, exports, module, global); failures are logged and
reported as 'preload-error' as before.
The only JavaScript Electron still evaluates in a sandboxed renderer is the
<webview> element implementation, now its own `webview_bundle`, and only in
renderers that enable `webviewTag`. The `process` npm polyfill is no longer
needed.