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doc: minor fixes event-loop-timers-and-nexttick.md

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Minor fixes and enhancements to event-loop-timers-and-nexttick.md
Added missing "be"
Added a link to REPL docs
Added definition of libuv and a link

PR-URL: https://github.com/nodejs/node/pull/9126
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit is contained in:
Dan Koster 2016-10-16 22:07:49 -07:00 committed by Italo A. Casas
parent 19cce15cbb
commit 7e6fcf324c
1 changed files with 7 additions and 3 deletions
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doc/topics/event-loop-timers-and-nexttick.md
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@ -9,13 +9,13 @@ offloading operations to the system kernel whenever possible.
Since most modern kernels are multi-threaded, they can handle multiple Since most modern kernels are multi-threaded, they can handle multiple
operations executing in the background. When one of these operations operations executing in the background. When one of these operations
completes, the kernel tells Node.js so that the appropriate callback completes, the kernel tells Node.js so that the appropriate callback
may added to the **poll** queue to eventually be executed. We'll explain may be added to the **poll** queue to eventually be executed. We'll explain
this in further detail later in this topic. this in further detail later in this topic.
## Event Loop Explained ## Event Loop Explained
When Node.js starts, it initializes the event loop, processes the When Node.js starts, it initializes the event loop, processes the
provided input script (or drops into the REPL, which is not covered in provided input script (or drops into the [REPL][], which is not covered in
this document) which may make async API calls, schedule timers, or call this document) which may make async API calls, schedule timers, or call
`process.nextTick()`, then begins processing the event loop. `process.nextTick()`, then begins processing the event loop.
@ -144,7 +144,9 @@ the timer's callback. In this example, you will see that the total delay
between the timer being scheduled and its callback being executed will between the timer being scheduled and its callback being executed will
be 105ms. be 105ms.
Note: To prevent the **poll** phase from starving the event loop, libuv Note: To prevent the **poll** phase from starving the event loop, [libuv]
(http://libuv.org/) (the C library that implements the Node.js
event loop and all of the asynchronous behaviors of the platform)
also has a hard maximum (system dependent) before it stops polling for also has a hard maximum (system dependent) before it stops polling for
more events. more events.
@ -480,3 +482,5 @@ myEmitter.on('event', function() {
console.log('an event occurred!'); console.log('an event occurred!');
}); });
``` ```
[REPL]: https://nodejs.org/api/repl.html#repl_repl