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feat(tests): Introduce BLOCKLY_BOOTSTRAP_OPTIONS

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Provide a mechanism for web pages that use bootstrap.js to control
what is loaded and how.
This commit is contained in:
Christopher Allen
2022-05-26 15:50:38 +01:00
parent dc16094551
commit 74d6be111c
1 changed files with 32 additions and 6 deletions
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38
tests/bootstrap.js vendored
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@@ -5,25 +5,51 @@
*/
/**
* @fileoverview Load this file in a <script> tag to prepare for
* importing Blockly into a web page.
* @fileoverview Bootstrap code to load Blockly, typically in
* uncompiled mode.
*
* Load this file in a <script> tag in a web page to use the
* Closure Library debug module loader to load Blockly in
* uncompiled mode.
*
* You must use a <script> tag to load this script first, then
* import blockly.mjs in a <script type=module> to obtain the
* loaded value.
* loaded module.
*
* See tests/playground.html for example usage.
*
* Exception: for speed and compatibility reasons, if this is
* script is loaded in Internet Explorer or from a host other than
* localhost, blockly_compressed.js (et al.) will be loaded
* instead. IE 11 doesn't understand modern JavaScript, and
* because of the sequential module loading carried out by the
*
* (Note also that this file eschews certain modern JS constructs,
* like template literals, for compatibility with IE 11.)
*
* The bootstrap code will consult a BLOCKLY_BOOTSTRAP_OPTIONS
* global variable to determine what to load. See further
* documentation inline.
*
*/
'use strict';
(function() {
// Decide whether we can load Blockly uncompiled, or must load the
// compiled version. Please see issue #5557 for more information.
const isIe = navigator.userAgent.indexOf('MSIE') !== -1 ||
navigator.appVersion.indexOf('Trident/') > -1;
const localhosts = ['localhost', '127.0.0.1', '[::1]'];
if (localhosts.includes(location.hostname) && !isIe) {
// Default bootstrap options.
const options = {
// Decide whether to use compmiled mode or not. Please see issue
// #5557 for more information.
loadCompiled: isIe || !localhosts.includes(location.hostname),
};
if (typeof window.BLOCKLY_BOOTSTRAP_OPTIONS === 'object') {
Object.assign(options, window.BLOCKLY_BOOTSTRAP_OPTIONS);
}
if (!options.loadCompiled) {
// We can load Blockly in uncompiled mode.
// Disable loading of closure/goog/deps.js (which doesn't exist).