Merge pull request #120 from javascript-tutorial/sync-9e3fa135

Sync with upstream @ 9e3fa13

Author: ipapoutsidis

1-js/02-first-steps/18-javascript-specials/article.md

@@ -103,13 +103,13 @@ More in: <info:variables> and <info:types>.
 
 We're using a browser as a working environment, so basic UI functions will be:
 
-[`prompt(question, [default])`](mdn:api/Window/prompt)
+[`prompt(question, [default])`](https://developer.mozilla.org/en-US/docs/Web/API/Window/prompt)
 : Ask a `question`, and return either what the visitor entered or `null` if they clicked "cancel".
 
-[`confirm(question)`](mdn:api/Window/confirm)
+[`confirm(question)`](https://developer.mozilla.org/en-US/docs/Web/API/Window/confirm)
 : Ask a `question` and suggest to choose between Ok and Cancel. The choice is returned as `true/false`.
 
-[`alert(message)`](mdn:api/Window/alert)
+[`alert(message)`](https://developer.mozilla.org/en-US/docs/Web/API/Window/alert)
 : Output a `message`.
 
 All these functions are *modal*, they pause the code execution and prevent the visitor from interacting with the page until they answer.
@@ -144,7 +144,7 @@ Assignments
 : There is a simple assignment: `a = b` and combined ones like `a *= 2`.
 
 Bitwise
-: Bitwise operators work with 32-bit integers at the lowest, bit-level: see the [docs](mdn:/JavaScript/Guide/Expressions_and_Operators#bitwise_operators) when they are needed.
+: Bitwise operators work with 32-bit integers at the lowest, bit-level: see the [docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators#bitwise_operators) when they are needed.
 
 Conditional
 : The only operator with three parameters: `cond ? resultA : resultB`. If `cond` is truthy, returns `resultA`, otherwise `resultB`.

1-js/05-data-types/04-array/article.md

@@ -98,7 +98,7 @@ The "trailing comma" style makes it easier to insert/remove items, because all l
 
 Let's say we want the last element of the array.
 
-Some programming languages allow to use negative indexes for the same purpose, like `fruits[-1]`.
+Some programming languages allow the use of negative indexes for the same purpose, like `fruits[-1]`.
 
 Although, in JavaScript it won't work. The result will be `undefined`, because the index in square brackets is treated literally.
 

2-ui/1-document/11-coordinates/article.md

@@ -36,7 +36,7 @@ Additionally, there are derived properties:
 ```online
 For instance click this button to see its window coordinates:
 
-<p><input id="brTest" type="button" value="Get coordinates using button.getBoundingClientRect() for this button" onclick='showRect(this)'/></p>
+<p><input id="brTest" type="button" style="max-width: 90vw;" value="Get coordinates using button.getBoundingClientRect() for this button" onclick='showRect(this)'/></p>
 
 <script>
 function showRect(elem) {

2-ui/3-event-details/6-pointer-events/article.md

@@ -69,7 +69,7 @@ Some pointer devices measure contact area and pressure, e.g. for a finger on the
 - `height` - the height of the area where the pointer touches the device. Where unsupported, it's always `1`.
 - `pressure` - the pressure of the pointer tip, in range from 0 to 1. For devices that don't support pressure must be either `0.5` (pressed) or `0`.
 - `tangentialPressure` - the normalized tangential pressure.
-- `tiltX`, `tiltY`, `twist` - pen-specific properties that describe how the pen is positioned relative the surface.
+- `tiltX`, `tiltY`, `twist` - pen-specific properties that describe how the pen is positioned relative to the surface.
 
 These properties aren't supported by most devices, so they are rarely used. You can find the details about them in the [specification](https://w3c.github.io/pointerevents/#pointerevent-interface) if needed.
 

5-network/10-long-polling/article.md

@@ -29,7 +29,7 @@ The flow:
 3. When a message appears - the server responds to the request with it.
 4. The browser makes a new request immediately.
 
-The situation when the browser sent a request and has a pending connection with the server, is standard for this method. Only when a message is delivered, the connection is reestablished.
+This situation, where the browser has sent a request and keeps a pending connection with the server, is standard for this method. Only when a message is delivered, the connection is closed and reestablished.
 
 ![](long-polling.svg)