* chore(deps): Update closure/goog/base.js, add goog.js
* Update base.js from the latest version (20220104.0.0).
* Also copy over goog.js, which provides access to asuitable subset
of goog.* via an importable module).
* refactor(tests): Have playground.html load Blockly as a module
N.B.:
* We still need a preparation step, in order to load base.js and
deps.js via <script> tags in uncompiled mode; in compiled mode
it will instead load all the *_compressed.js files via <script>
tags.
Acess to the Blockly object is via:
import Blockly from './playgrounds/blockly.mjs';
(N.B: no "* as", since blockly.mjs has only a default export.)
* There remain two serious defects when running in uncompiled mode:
* It does not attempt to load msg/messages.js, causing startup to
fail.
* Module loading only works if there are no ES Modules; if there
are, something goes wrong with base.js's attempt to sequence
module loads causing goog.modules that import ES modules to get
a null exports object for that import. X-(
* fix(tests): Have playground.html load messages.js before generators
This fixes the issue caused by missing messages when loading
the generators.
* fix(tests): Move bootsrap calls to prepare.js
Move the calls to goog.bootstrap from blockly.mjs to prepare.mjs.
This is needed to work around a bug in the Cosure Library debug
loader (https://github.com/google/closure-library/issues/1152).
This gets a bit ugly because most of the code has to go in a
<script> (because it needs goog.bootstrap, which was loaded by
an earlier <script> tag).
* fix(documentation): Minor comment corrections for PR #5931
The version of base.js we have been using is a cut-down copy of an older
version, stripped of everything that wasn't strictly needed for Blockly.
We now need things that were previously stripped out, so restore the
current version from
https://github.com/google/closure-library/blob/master/closure/goog/base.js
as of commit 5cb5e81 (2021-06-04).
We can always strip out unused sections again in future - once we know
which sections those are.
Christopher Allen
Sam El-Husseini
Neil Fraser