Fix various ESLint 'no-undef' rule instances.

https://eslint.org/docs/latest/rules/no-undef

2 files changed, 5 insertions, 2 deletions

diff --git a/eslint.config.js b/eslint.config.js
index a42b6d0e3..9b54e36af 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -30,6 +30,9 @@ export default [
         navigator: 'readonly',
         Event: 'readonly',
         CustomEvent: 'readonly',
+        Element: 'readonly',
+        IntersectionObserver: 'readonly',
+        MutationObserver: 'readonly',
 
         // Dojo
         dojo: 'readonly',
diff --git a/js/common.js b/js/common.js
index 3e8a66e5b..60b2f4c9c 100755
--- a/js/common.js
+++ b/js/common.js
@@ -98,7 +98,7 @@ Element.prototype.fadeOut = function() {
 		if ((self.style.opacity -= 0.1) < 0) {
 			self.style.display = "none";
 		} else {
-			requestAnimationFrame(fade);
+			window.requestAnimationFrame(fade);
 		}
 	}());
 };
@@ -112,7 +112,7 @@ Element.prototype.fadeIn = function(display = undefined){
 		let val = parseFloat(self.style.opacity);
 		if (!((val += 0.1) > 1)) {
 			self.style.opacity = val;
-			requestAnimationFrame(fade);
+			window.requestAnimationFrame(fade);
 		}
 	}());
 };