Use class name instead of this to refer to class fields

(This is to workaround a bug in esbuild: evanw/esbuild#885)

lib/QueryOperators.js

@@ -4,7 +4,7 @@
 //
 // Constants that represent supported operators in queries.
 //
-// Like this? Fund us!
+// Like QueryOperators? Fund us!
 // https://small-tech.org/fund-us
 //
 // Copyright ⓒ 2020-2021 Aral Balkan. Licensed under AGPLv3 or later.
@@ -18,12 +18,15 @@ export default class QueryOperators {
   static STRICT_DOES_NOT_EQUAL = '!=='
 
   static RELATIONAL_OPERATORS = {
-    is: this.STRICT_EQUALS,
-    isEqualTo: this.STRICT_EQUALS,
-    equals: this.STRICT_EQUALS,
+    // Note: do not use “this” here until this bug in esbuild is fixed
+    // ===== as it messes up the distribution bundle:
+    //       https://github.com/evanw/esbuild/issues/885
+    is: QueryOperators.STRICT_EQUALS,
+    isEqualTo: QueryOperators.STRICT_EQUALS,
+    equals: QueryOperators.STRICT_EQUALS,
 
-    isNot: this.STRICT_DOES_NOT_EQUAL,
-    doesNotEqual: this.STRICT_DOES_NOT_EQUAL,
+    isNot: QueryOperators.STRICT_DOES_NOT_EQUAL,
+    doesNotEqual: QueryOperators.STRICT_DOES_NOT_EQUAL,
 
     isGreaterThan: '>',
     isGreaterThanOrEqualTo: '>=',