Ignore specific warnings/errors - even after new versions of JSHINT t…

…hey still come up and can't be disabled: fix #298

js/core/editorJavaScript.js

@@ -13,7 +13,7 @@
 (function(){
   var editors = [];
   var id = 0; // auto-incrementing ID used for codeMirror elements
-  var defaultLintFlags = {
+  var defaultLintFlags = { // https://jshint.com/docs/options/
     esversion   : 6,    // Enable ES6 for literals, arrow fns, binary
     evil        : true, // don't warn on use of strings in setInterval
     laxbreak    : true,  // don't warn about newlines in expressions

js/libs/codemirror/addon/lint/javascript-lint.js

@@ -33,6 +33,9 @@
     for ( var i = 0; i < errors.length; i++) {
       var error = errors[i];
       if (error) {
+        if (error.a == 'nullish coalescing') continue; // ignore these warnings - we don't want to enable all ES11 just to disable this
+        if (error.code == "E054") continue; // Class properties must be methods (no way to ignore otherwise?) #298
+
         if (error.line <= 0) {
           if (window.console) {
             window.console.warn("Cannot display JSHint error (invalid line " + error.line + ")", error);