fix: it

Author: Koooooo-7

src/core/render/compiler/link.js

@@ -54,7 +54,11 @@ export const linkCompiler = ({
     }
 
     if (config.class) {
-      attrs.push(`class="${config.class}"`);
+      let classes = config.class;
+      if (Array.isArray(config.class)) {
+        classes = config.class.join(' ');
+      }
+      attrs.push(`class="${classes}"`);
     }
 
     if (config.id) {

test/integration/render.test.js

@@ -285,7 +285,7 @@ describe('render', function () {
       );
 
       expect(output).toMatchInlineSnapshot(
-        `"<p><a href="http://url" target="_blank"  rel="noopener" class="someCssClass,anotherCssClass">alt text</a></p>"`,
+        `"<p><a href="http://url" target="_blank"  rel="noopener" class="someCssClass anotherCssClass">alt text</a></p>"`,
       );
     });