Use existing property quoting function

src/compile/nodes/Element.ts

@@ -895,7 +895,7 @@ export default class Element extends Node {
 				snippet = expression.snippet;
 				dependencies = expression.dependencies;
 			} else {
-				snippet = `ctx${propertize(name)}`;
+				snippet = `ctx${quotePropIfNecessary(name)}`;
 				dependencies = [name];
 			}
 			const updater = `@toggleClass(${this.var}, "${name}", ${snippet});`;
@@ -904,7 +904,7 @@ export default class Element extends Node {
 
 			if ((dependencies && dependencies.size > 0) || this.classDependencies.length) {
 				const allDeps = this.classDependencies.concat(...dependencies);
-				const deps = allDeps.map(dependency => `changed${propertize(dependency)}`).join(' || ');
+				const deps = allDeps.map(dependency => `changed${quotePropIfNecessary(dependency)}`).join(' || ');
 				const condition = allDeps.length > 1 ? `(${deps})` : deps;
 
 				block.builders.update.addConditional(
@@ -987,7 +987,7 @@ export default class Element extends Node {
 
 		const classExpr = this.classes.map((classDir: Class) => {
 			const { expression, name } = classDir;
-			const snippet = expression ? expression.snippet : `ctx${propertize(name)}`;
+			const snippet = expression ? expression.snippet : `ctx${quotePropIfNecessary(name)}`;
 			return `${snippet} ? "${name}" : ""`;
 		}).join(', ');
 
@@ -1168,7 +1168,3 @@ const events = [
 			name === 'volume'
 	}
 ];
-
-function propertize(prop) {
-	return /^[a-zA-Z_$][0-9a-zA-Z_$]*$/.test(prop) ? `.${prop}` : `["${prop}"]`;
-}