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diff --git a/docs/runtime/program_lifecycle.md b/docs/runtime/program_lifecycle.md
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-## Program lifecycle
-
-Deno supports browser compatible lifecycle events: `load` and `unload`. You can
-use these events to provide setup and cleanup code in your program.
-
-Listeners for `load` events can be asynchronous and will be awaited. Listeners
-for `unload` events need to be synchronous. Both events cannot be cancelled.
-
-Example:
-
-**main.ts**
-
-```ts
-import "./imported.ts";
-
-const handler = (e: Event): void => {
-  console.log(`got ${e.type} event in event handler (main)`);
-};
-
-window.addEventListener("load", handler);
-
-window.addEventListener("unload", handler);
-
-window.onload = (e: Event): void => {
-  console.log(`got ${e.type} event in onload function (main)`);
-};
-
-window.onunload = (e: Event): void => {
-  console.log(`got ${e.type} event in onunload function (main)`);
-};
-
-console.log("log from main script");
-```
-
-**imported.ts**
-
-```ts
-const handler = (e: Event): void => {
-  console.log(`got ${e.type} event in event handler (imported)`);
-};
-
-window.addEventListener("load", handler);
-window.addEventListener("unload", handler);
-
-window.onload = (e: Event): void => {
-  console.log(`got ${e.type} event in onload function (imported)`);
-};
-
-window.onunload = (e: Event): void => {
-  console.log(`got ${e.type} event in onunload function (imported)`);
-};
-
-console.log("log from imported script");
-```
-
-Note that you can use both `window.addEventListener` and
-`window.onload`/`window.onunload` to define handlers for events. There is a
-major difference between them, let's run the example:
-
-```shell
-$ deno run main.ts
-log from imported script
-log from main script
-got load event in event handler (imported)
-got load event in event handler (main)
-got load event in onload function (main)
-got unload event in event handler (imported)
-got unload event in event handler (main)
-got unload event in onunload function (main)
-```
-
-All listeners added using `window.addEventListener` were run, but
-`window.onload` and `window.onunload` defined in `main.ts` overrode handlers
-defined in `imported.ts`.
-
-In other words, you can register multiple `window.addEventListener` `"load"` or
-`"unload"` events, but only the last loaded `window.onload` or `window.onunload`
-event handlers will be executed. It is preferable to use `addEventListener` when
-possible for this reason.