iTrauco
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diff --git a/‎20_node.md‎
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@@ -370,6 +370,17 @@ inconvenient when you want to save a non-function value in there—but
 you can still create such properties by directly manipulating the
 prototype after you've defined the class.
 
+Like `function`, `class` can be used both in statement and in
+expression positions. When used as an expression, it doesn't define a
+binding, but just produces the class as a value. The class name can be
+omitted in that case.
+
+```
+let object = (new class { getWord() { return "hello"; } });
+console.log(object.getWord());
+// → hello
+```
+
 ## Overriding derived properties
 
 {{index "shared property", overriding}}
 
@@ -404,10 +404,10 @@ are optional and taken to be zero when not given.
 {{index "getTime method"}}
 
 Timestamps are stored as the number of milliseconds since the start of
-1970, using negative numbers for times before 1970 (following a
-convention set by “((Unix time))”, which was invented around that
-time). The `getTime` method on a date object returns this number. It
-is big, as you can imagine.
+1970, in the UTC ((time zone)), using negative numbers for times
+before 1970 (following a convention set by “((Unix time))”, which was
+invented around that time). The `getTime` method on a date object
+returns this number. It is big, as you can imagine.
 
 ```
 console.log(new Date(2013, 11, 19).getTime());
 
@@ -184,7 +184,7 @@ A short HTML document might look like this:
 <!doctype html>
 <html>
   <head>
-    <meta charset="utf8">
+    <meta charset="utf-8">
     <title>My home page</title>
   </head>
   <body>
@@ -270,7 +270,7 @@ The following document will be treated just like the one shown previously:
 
 ```{lang: "text/html"}
 <!doctype html>
-<meta charset=utf8>
+<meta charset=utf-8>
 
 <title>My home page</title>
 
 
@@ -114,9 +114,9 @@ $ node
 $
 ```
 
-{{index "process object", "global scope", [variable, global], "exit method", "status code"}}
+{{index "process object", "global scope", [binding, global], "exit method", "status code"}}
 
-The `process` variable, just like the `console` variable, is available
+The `process` binding, just like the `console` binding, is available
 globally in Node. It provides various ways to inspect and manipulate
 the current program. The `exit` method ends the process and can be
 given an exit status code, which tells the program that started `node`
@@ -136,9 +136,9 @@ $ node showargv.js one --and two
 ["node", "/tmp/showargv.js", "one", "--and", "two"]
 ```
 
-{{index [variable, global]}}
+{{index [binding, global]}}
 
-All the ((standard)) JavaScript global variables, such as `Array`,
+All the ((standard)) JavaScript global bindings, such as `Array`,
 `Math`, and `JSON`, are also present in Node's environment.
 Browser-related functionality, such as `document` and `prompt`, is
 absent.
@@ -147,7 +147,7 @@ absent.
 
 {{index "Node.js", "global scope", "module loader"}}
 
-Beyond the few variables I mentioned, such as `console` and `process`,
+Beyond the few bindings I mentioned, such as `console` and `process`,
 Node puts little functionality in the global scope. If you want to
 access built-in functionality, you have to ask the module system for
 it.
@@ -501,7 +501,7 @@ request to your server. It will respond with a small HTML page.
 
 The function passed as argument to `createServer` is called every time
 a client connects to the server. The `request` and `response`
-variables are objects representing the incoming and outgoing data. The
+bindings are objects representing the incoming and outgoing data. The
 first contains information about the ((request)), such as its `url`
 property, which tells us to what URL the request was made.
 
@@ -622,8 +622,8 @@ one piece at a time, rather than in one shot as with `writeFile`.
 {{index "createServer function", "request function", "event handling", "readable stream"}}
 
 Readable ((stream))s are a little more involved. Both the `request`
-variable that was passed to the HTTP server's callback function and
-the `response` variable passed to the HTTP client are readable
+binding that was passed to the HTTP server's callback function and
+the `response` binding passed to the HTTP client are readable
 streams. (A server reads requests and then writes responses, whereas a
 client first writes a request and then reads a response.) Reading from
 a stream is done using event handlers, rather than methods.
@@ -661,7 +661,7 @@ createServer((request, response) => {
 
 {{index "Buffer class", "toString method"}}
 
-The `chunk` variable passed to the data handler will be a binary
+The `chunk` value passed to the data handler will be a binary
 `Buffer`. We can convert this to string by decoding it as UTF-8
 encoded characters with its `toString` method..
 
@@ -791,13 +791,13 @@ decodes that to get rid of the `%20`-style escape codes, and resolves
 it relative to the program's working directory.
 
 ```{includeCode: ">code/file_server.js"}
-const {parse: parseURL} = require("url");
+const {parse} = require("url");
 const {resolve} = require("path");
 
 const baseDirectory = process.cwd() + "/";
 
 function urlPath(url) {
-  let {pathname} = parseURL(url);
+  let {pathname} = parse(url);
   let path = resolve(decodeURIComponent(pathname).slice(1));
   if (!path.startsWith(baseDirectory)) {
     throw {status: 403, body: "Forbidden"};