Merge branch 'main' into korean

Author: chrishtr

book/scripts.md

@@ -362,6 +362,23 @@ Python and JavaScript get pretty complicated. *Because* these bugs are hard,
 it's worth approaching debugging systematically and gathering a lot of
 information before attempting a fix.
 
+::: {.further}
+Early web browsers offered about this support for JavaScript debugging!
+Today's sophisticated developer tools came together bit by bit.
+Microsoft's [Script Debugger][msd] introduced a step debugger for
+JavaScript,^[Which it called JScript for trademark reasons.]
+[Firebug][firebug] introduced a JS Console and the Network tab,
+and Webkit's [Web Inspector][web-inspector] the "Inspect" button
+and DOM view. These features were so useful they quickly [became
+standard][chrome-devtools] and are now a core part of every browser
+engine.
+:::
+
+[msd]: https://en.wikipedia.org/wiki/Microsoft_Script_Debugger
+[firebug]: https://hacks.mozilla.org/2017/10/saying-goodbye-to-firebug/
+[web-inspector]: https://webkit.org/blog/5718/10-years-of-web-inspector/
+[chrome-devtools]: https://blog.chromium.org/2018/09/10-years-of-chrome-devtools.html
+
 Returning Handles
 =================
 

book/skipped.md

@@ -165,14 +165,13 @@ are often implemented in HTML and rendered by the browser itself.
 
 Also, it'd be almost impossible to build complex web apps without some
 kind of debugging aid, so all real browsers have built-in debuggers.
-Believe it or not, for quite a long time web developers just did a
-lot of [`console.log` debugging][printf] (or even `alert` debugging,
-before there was an easy way to see the console!). This changed in a big
-way with the innovative [Firebug] browser extension for Firefox, and
-eventually today's integrated developer tools. These developer tools have
-deep integration with the browser engine itself to implement features like
-observing the styles of elements in real time or pausing and stepping
-through JavaScript execution.
+Believe it or not, for quite a long time web developers just did a lot
+of [console.log debugging][printf] (or even alert debugging, before
+there was an easy way to see the console!). Early web debuggers like
+[Firebug][firebug] felt like the move from black-and-white to color.
+And features like viewing AJAX requests, single-stepping JavaScript
+code, and inspecting elements were invented by various browsers and
+eventually came together in today's integrated developer tools.
 
 [printf]: https://en.wikipedia.org/wiki/Debugging#printf_debugging
 [firebug]: https://en.wikipedia.org/wiki/Firebug_(software)