Make MathJax show errors for bad TeX but only in the problem editor. (another alternate for #2837 and #2838)

htdocs/js/MathJaxConfig/mathjax-config.js

@@ -1,6 +1,6 @@
 if (!window.MathJax) {
 	window.MathJax = {
-		tex: { packages: { '[+]': ['noerrors'] } },
+		tex: { packages: { '[+]': webworkConfig?.showMathJaxErrors ? [] : ['noerrors'] } },
 		loader: { load: ['input/asciimath', '[tex]/noerrors'] },
 		startup: {
 			ready() {

htdocs/js/PGProblemEditor/pgproblemeditor.js

@@ -382,6 +382,7 @@
 				requestData.set('send_pg_flags', 1);
 				requestData.set(button.name, button.value);
 				requestData.set('set_id', document.getElementsByName('hidden_set_id')[0]?.value ?? 'Unknown Set');
+				requestData.set('showMathJaxErrors', 1);
 
 				await renderProblem(requestData);
 
@@ -473,7 +474,8 @@
 					displayMode: document.getElementById('action_view_displayMode_id')?.value ?? 'MathJax',
 					language: document.querySelector('input[name="hidden_language"]')?.value ?? 'en',
 					send_pg_flags: 1,
-					view_problem_debugging_info: 1
+					view_problem_debugging_info: 1,
+					showMathJaxErrors: 1
 				})
 			).then(() => resolve());
 		});

lib/FormatRenderedProblem.pm

@@ -267,6 +267,7 @@ sub formatRenderedProblem {
 		showCorrectAnswersOnlyButton => $ws->{inputs_ref}{showCorrectAnswersOnlyButton} // 0,
 		showFooter                   => $ws->{inputs_ref}{showFooter}                   // '',
 		problem_data                 => encode_json($rh_result->{PERSISTENCE_HASH}),
+		showMathJaxErrors            => $ws->{inputs_ref}{showMathJaxErrors} // 0,
 		pretty_print                 => \&pretty_print
 	);
 

lib/WeBWorK/ContentGenerator.pm

@@ -32,6 +32,7 @@ use MIME::Base64;
 use Scalar::Util qw(weaken);
 use HTML::Entities;
 use Encode;
+use Mojo::JSON qw(encode_json);
 
 use WeBWorK::File::Scoring qw(parse_scoring_file);
 use WeBWorK::Localize;
@@ -682,20 +683,15 @@ sub page_title ($c) {
 	return route_title($c, $c->current_route, 1);
 }
 
-=item webwork_url
+=item webwork_js_config
 
-Defined in this package.
-
-Outputs the $webwork_url defined in site.conf, unless $webwork_url is equal to
-"/", in which case this outputs the empty string.
-
-This is used to set a value in a global webworkConfig javascript variable,
-that can be accessed in javascript files.
+Outputs the webwork2 JavaScript configuration.  This configuration can be
+accessed by JavaScript files to obtain various webwork2 settings.
 
 =cut
 
-sub webwork_url ($c) {
-	return $c->location;
+sub webwork_js_config ($c) {
+	return encode_json({ webwork_url => $c->location });
 }
 
 =item warnings()

templates/ContentGenerator/SampleProblemViewer.html.ep

@@ -14,7 +14,7 @@
 	<%= javascript $c->url({
 		type => 'webwork', name => 'htdocs', file => 'node_modules/minisearch/dist/umd/index.js'
 	}), defer => undef =%>
-	<script>const webworkConfig = { webwork_url: '<%= $c->webwork_url %>' };</script>
+	<script>const webworkConfig = <%== $c->webwork_js_config %>;</script>
 	<%= javascript $c->url({
 		type => 'webwork', name => 'htdocs', file => 'js/SampleProblemViewer/documentation-search.js'
 	}), defer => undef =%>

templates/RPCRenderFormats/default.html.ep

@@ -19,6 +19,7 @@
 	% for (@$extra_css_files) {
 		%= stylesheet $_->{file}
 	% }
+	<script>const webworkConfig = <%= $showMathJaxErrors ? '{ showMathJaxErrors: true }' : 'null' %>;</script>
 	% for (@$third_party_js) {
 		%= javascript $_->[0], %{ $_->[1] // {} }
 	% }

templates/layouts/system.html.ep

@@ -20,7 +20,7 @@
 % }
 %
 % # Webwork configuration for javascript
-<script>const webworkConfig = { webwork_url: '<%= $c->webwork_url %>' };</script>
+<script>const webworkConfig = <%== $c->webwork_js_config %>;</script>
 %
 % # JS Loads
 <%= javascript $c->url({ type => 'webwork', name => 'htdocs', file => 'js/MathJaxConfig/mathjax-config.js' }),