Merge pull request #190 from javascript-tutorial/sync-2d5be7b7

Sync with upstream @ 2d5be7b

Author: odsantos

1-js/06-advanced-functions/04-var/article.md

@@ -264,7 +264,7 @@ In all the above cases we declare a Function Expression and run it immediately.
 
 There are two main differences of `var`:
 
-1. `var` variables have no block scope; their visibility is scoped to current function, or global, if declared outside function.
+1. `var` variables have no block scope, their visibility is scoped to current function, or global, if declared outside function.
 2. `var` declarations are processed at function start (script start for globals).
 
 There's one more very minor difference related to the global object, that we'll cover in the next chapter.

1-js/06-advanced-functions/05-global-object/article.md

@@ -1,7 +1,7 @@
 
 # Objeto global
 
-O objeto global fornece variáveis e funções que estão disponíveis em qualquer lugar. Em sua maioria, aqueles que são incorporados ao idioma ou ao ambiente.
+O objeto global fornece variáveis e funções que estão disponíveis em qualquer lugar. Na sua maioria, aquelas que são incorporadas ao idioma ou ao ambiente.
 
 No navegador ele é chamado de `window`, no Node.js é `global`, em outros ambientes pode ter outro nome.
 
@@ -25,6 +25,8 @@ var gVar = 5;
 alert(window.gVar); // 5 (se torna uma propriedade do objeto global)
 ```
 
+O mesmo efeito têm declarações de função (instruções com a palavra-chave `function` no fluxo principal do código, não expressões de função).
+
 Por favor, não confie nisso! Esse comportamento existe por motivos de compatibilidade. Scripts modernos usam [JavaScript modules](info:modules) onde tal coisa não acontece.
 
 Se usássemos `let`, isso não aconteceria:

1-js/06-advanced-functions/06-function-object/article.md

@@ -347,7 +347,7 @@ If the function is declared as a Function Expression (not in the main code flow)
 
 Also, functions may carry additional properties. Many well-known JavaScript libraries make great use of this feature.
 
-They create a "main" function and attach many other "helper" functions to it. For instance, the [jQuery](https://jquery.com) library creates a function named `$`. The [lodash](https://lodash.com) library creates a function `_`, and then adds `_.clone`, `_.keyBy` and other properties to it (see the [docs](https://lodash.com/docs) when you want learn more about them). Actually, they do it to lessen their pollution of the global space, so that a single library gives only one global variable. That reduces the possibility of naming conflicts.
+They create a "main" function and attach many other "helper" functions to it. For instance, the [jQuery](https://jquery.com) library creates a function named `$`. The [lodash](https://lodash.com) library creates a function `_`, and then adds `_.clone`, `_.keyBy` and other properties to it (see the [docs](https://lodash.com/docs) when you want to learn more about them). Actually, they do it to lessen their pollution of the global space, so that a single library gives only one global variable. That reduces the possibility of naming conflicts.
 
 
 So, a function can do a useful job by itself and also carry a bunch of other functionality in properties.

1-js/06-advanced-functions/07-new-function/article.md

@@ -91,7 +91,7 @@ Perhaps we want it to be able to access outer local variables?
 
 The problem is that before JavaScript is published to production, it's compressed using a *minifier* -- a special program that shrinks code by removing extra comments, spaces and -- what's important, renames local variables into shorter ones.
 
-For instance, if a function has `let userName`, minifier replaces it `let a` (or another letter if this one is occupied), and does it everywhere. That's usually a safe thing to do, because the variable is local, nothing outside the function can access it. And inside the function, minifier replaces every mention of it. Minifiers are smart, they analyze the code structure, so they don't break anything. They're not just a dumb find-and-replace.
+For instance, if a function has `let userName`, minifier replaces it with `let a` (or another letter if this one is occupied), and does it everywhere. That's usually a safe thing to do, because the variable is local, nothing outside the function can access it. And inside the function, minifier replaces every mention of it. Minifiers are smart, they analyze the code structure, so they don't break anything. They're not just a dumb find-and-replace.
 
 But, if `new Function` could access outer variables, then it would be unable to find `userName`, since this is passed in as a string *after* the code is minified.
 

1-js/06-advanced-functions/08-settimeout-setinterval/article.md

@@ -130,7 +130,7 @@ setTimeout(() => { clearInterval(timerId); alert('stop'); }, 5000);
 ```smart header="Modal windows freeze time in Chrome/Opera/Safari"
 In browsers IE and Firefox the internal timer continues "ticking" while showing `alert/confirm/prompt`, but in Chrome, Opera and Safari the internal timer becomes "frozen".
 
-So if you run the code above and don't dismiss the `alert` window for some time, then in Firefox/IE next `alert` will be shown immediately as you do it (2 seconds passed from the previous invocation), and in Chrome/Opera/Safari -- after 2 more seconds (timer did not tick during the `alert`).
+So if you run the code above and don't dismiss the `alert` window for some time, then the next `alert` will be shown immediately as you do it. The actual interval between alerts will be shorter than 2 seconds.
 ```
 
 ## Nested setTimeout
@@ -382,7 +382,7 @@ First timers run immediately (just as written in the spec), and then the delay c
 
 That limitation comes from ancient times and many scripts rely on it, so it exists for historical reasons.
 
-For server-side JavaScript, that limitation does not exist, and there exist other ways to schedule an immediate asynchronous job, like [process.nextTick](https://nodejs.org/api/process.html) and [setImmediate](https://nodejs.org/api/timers.html) for Node.js. So the notion is browser-specific only.
+For server-side JavaScript, that limitation does not exist, and there exist other ways to schedule an immediate asynchronous job, like [setImmediate](https://nodejs.org/api/timers.html#timers_setimmediate_callback_args) for Node.js. So this note is browser-specific.
 ````
 
 ### Allowing the browser to render
@@ -447,7 +447,7 @@ Now the `<div>` shows increasing values of `i`.
 - To cancel the execution, we should call `clearTimeout/clearInterval` with the value returned by `setTimeout/setInterval`.
 - Nested `setTimeout` calls are a more flexible alternative to `setInterval`, allowing us to set the time *between* executions more precisely.
 - Zero delay scheduling with `setTimeout(func, 0)` (the same as `setTimeout(func)`) is used to schedule the call "as soon as possible, but after the current script is complete".
-- The browser limits the minimal delay for five or more nested call of `setTimeout` or for `setInterval` (after 5th call) to 4ms. That's for historical reasons.
+- The browser limits the minimal delay for five or more nested calls of `setTimeout` or for `setInterval` (after 5th call) to 4ms. That's for historical reasons.
 
 Please note that all scheduling methods do not *guarantee* the exact delay. We should not rely on that in the scheduled code.
 

1-js/08-prototypes/01-prototype-inheritance/article.md

@@ -199,8 +199,8 @@ alert(admin.fullName); // John Smith (*)
 // setter triggers!
 admin.fullName = "Alice Cooper"; // (**)
 
-alert(admin.fullName); // Alice Cooper , state of admin modified
-alert(user.fullName); // John Smith , state of user protected
+alert(admin.fullName); // Alice Cooper, state of admin modified
+alert(user.fullName); // John Smith, state of user protected
 ```
 
 Here in the line `(*)` the property `admin.fullName` has a getter in the prototype `user`, so it is called. And in the line `(**)` the property has a setter in the prototype, so it is called.

2-ui/2-events/02-bubbling-and-capturing/article.md

@@ -197,7 +197,7 @@ The event handling process:
 
 - Then the event moves down from the document root to `event.target`, calling handlers assigned with `addEventListener(..., true)` on the way (`true` is a shorthand for `{capture: true}`).
 - Then handlers are called on the target element itself.
-- Then the event bubbles up from `event.target` to the root, calling handlers assigned using `on<event>` and `addEventListener` without the 3rd argument or with the 3rd argument `false/{capture:false}`.
+- Then the event bubbles up from `event.target` to the root, calling handlers assigned using `on<event>`, HTML attributes and `addEventListener` without the 3rd argument or with the 3rd argument `false/{capture:false}`.
 
 Each handler can access `event` object properties:
 

2-ui/2-events/03-event-delegation/article.md

@@ -5,7 +5,7 @@ Capturing and bubbling allow us to implement one of most powerful event handling
 
 The idea is that if we have a lot of elements handled in a similar way, then instead of assigning a handler to each of them -- we put a single handler on their common ancestor.
 
-In the handler we get `event.target`, see where the event actually happened and handle it.
+In the handler we get `event.target` to see where the event actually happened and handle it.
 
 Let's see an example -- the [Ba-Gua diagram](http://en.wikipedia.org/wiki/Ba_gua) reflecting the ancient Chinese philosophy.