diff --git a/templates/main.js b/templates/main.js
index 8684e166..d7ae7fae 100755
--- a/templates/main.js
+++ b/templates/main.js
@@ -253,13 +253,28 @@ var postCaptchaId = null;
 function onCaptchaLoadHcaptcha() {
 	if (captcha_renderer === null && (active_page === 'index' || active_page === 'catalog' || active_page === 'thread')) {
 		let renderer = {
+			/**
+			 * @returns {object} Opaque widget id.
+			 */
 			applyOn: (container, params) => hcaptcha.render(container, {
 				sitekey: "{{ config.hcaptcha_public }}",
 				callback: params['on-success'],
 			}),
+			/**
+			 * @returns {void}
+			 */
 			remove: (widgetId) => { /* Not supported */ },
+			/**
+			 * @returns {void}
+			 */
 			reset: (widgetId) => hcaptcha.reset(widgetId),
+			/**
+			 * @returns {bool}
+			 */
 			hasResponse: (widgetId) => !!hcaptcha.getResponse(widgetId),
+			/**
+			 * @returns {void}
+			 */
 			execute: (widgetId) => hcaptcha.execute(widgetId)
 		};
 
@@ -283,6 +298,9 @@ window.onCaptchaLoadTurnstile_post_thread = function() {
 function onCaptchaLoadTurnstile(action) {
 	if (captcha_renderer === null && (active_page === 'index' || active_page === 'catalog' || active_page === 'thread')) {
 		let renderer = {
+			/**
+			 * @returns {object} Opaque widget id.
+			 */
 			applyOn: function(container, params) {
 				let widgetId = turnstile.render('#' + container, {
 					sitekey: "{{ config.turnstile_public }}",
@@ -294,9 +312,21 @@ function onCaptchaLoadTurnstile(action) {
 				}
 				return widgetId;
 			},
+			/**
+			 * @returns {void}
+			 */
 			remove: (widgetId) => turnstile.remove(widgetId),
+			/**
+			 * @returns {void}
+			 */
 			reset: (widgetId) => turnstile.reset(widgetId),
+			/**
+			 * @returns {bool}
+			 */
 			hasResponse: (widgetId) => !!turnstile.getResponse(widgetId),
+			/**
+			 * @returns {void}
+			 */
 			execute: (widgetId) => turnstile.execute(widgetId)
 		};