Add comment to PostInfo.vue

Signed-off-by: Muhammad Umer Farooq <umer@lablnet.com>

Author: lablnet

src/components/PostInfo.vue

@@ -164,20 +164,30 @@ export default {
     },
     async mounted() {
         await this.getContributors()
+
+        // Observe the theme change.
         var targetNode = document.querySelector('html');
         this.theme = targetNode.className;
+        // Options for the observer (which mutations to observe)
         var config = { attributes: true, attributeFilter: ['class'] };
 
+        // Callback function to execute when mutations are observed
         var callback = (mutationsList, observer) => {
             for(let mutation of mutationsList) {
+                // Check if the class attribute has changed.
                 if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
+                    // Check if class is not empty.
                     if (mutation.target.className) {
+                      // Set the theme to the new class.
                       this.theme = mutation.target.className;
                     }
                 }
             }
         };
+
+        // Create an observer instance linked to the callback function
         var observer = new MutationObserver(callback);
+        // Start observing the target node for configured mutations
         observer.observe(targetNode, config);
 
         // Scroll to the hash if it exists.