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doc: clarify repl exception conditions

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The sample code demonstrating ERR_INVALID_REPL_INPUT is confusing, I
think. This simplifies and clarifies it a bit, I hope.

PR-URL: https://github.com/nodejs/node/pull/37142
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
This commit is contained in:
Rich Trott
2021-01-30 05:39:16 -08:00
parent c746c403ab
commit e30e035dcd
1 changed files with 13 additions and 22 deletions
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35
doc/api/repl.md
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@@ -163,31 +163,22 @@ This use of the [`domain`][] module in the REPL has these side effects:
* Uncaught exceptions only emit the [`'uncaughtException'`][] event in the
standalone REPL. Adding a listener for this event in a REPL within
another Node.js program throws [`ERR_INVALID_REPL_INPUT`][].
another Node.js program results in [`ERR_INVALID_REPL_INPUT`][].
```js
const r = repl.start();
r.write('process.on("uncaughtException", () => console.log("Foobar"));\n');
// Output stream includes:
// TypeError [ERR_INVALID_REPL_INPUT]: Listeners for `uncaughtException`
// cannot be used in the REPL
r.close();
```
* Trying to use [`process.setUncaughtExceptionCaptureCallback()`][] throws
an [`ERR_DOMAIN_CANNOT_SET_UNCAUGHT_EXCEPTION_CAPTURE`][] error.
As standalone program:
```js
process.on('uncaughtException', () => console.log('Uncaught'));
throw new Error('foobar');
// Uncaught
```
When used in another application:
```js
process.on('uncaughtException', () => console.log('Uncaught'));
// TypeError [ERR_INVALID_REPL_INPUT]: Listeners for `uncaughtException`
// cannot be used in the REPL
throw new Error('foobar');
// Thrown:
// Error: foobar
```
#### Assignment of the `_` (underscore) variable
<!-- YAML
changes: