diff --git a/src/js/core/polyfills.js b/src/js/core/polyfills.js
deleted file mode 100644
index 5f979c43..00000000
--- a/src/js/core/polyfills.js
+++ /dev/null
@@ -1,38 +0,0 @@
-function mathPolyfills() {
-    // Converts from degrees to radians.
-    Math.radians = function (degrees) {
-        return (degrees * Math.PI) / 180.0;
-    };
-
-    // Converts from radians to degrees.
-    Math.degrees = function (radians) {
-        return (radians * 180.0) / Math.PI;
-    };
-}
-
-function domPolyfills() {
-    // from:https://github.com/jserz/js_piece/blob/master/DOM/ChildNode/remove()/remove().md
-    (function (arr) {
-        arr.forEach(function (item) {
-            if (item.hasOwnProperty("remove")) {
-                return;
-            }
-            Object.defineProperty(item, "remove", {
-                configurable: true,
-                enumerable: true,
-                writable: true,
-                value: function remove() {
-                    this.parentNode.removeChild(this);
-                },
-            });
-        });
-    })([Element.prototype, CharacterData.prototype, DocumentType.prototype]);
-}
-
-function initPolyfills() {
-    mathPolyfills();
-    domPolyfills();
-}
-
-// Other polyfills
-initPolyfills();
diff --git a/src/js/core/polyfills.ts b/src/js/core/polyfills.ts
new file mode 100644
index 00000000..0467e50f
--- /dev/null
+++ b/src/js/core/polyfills.ts
@@ -0,0 +1,9 @@
+// Converts from degrees to radians.
+Math.radians = function (degrees: number): number {
+    return (degrees * Math.PI) / 180.0;
+};
+
+// Converts from radians to degrees.
+Math.degrees = function (radians: number): number {
+    return (radians * 180.0) / Math.PI;
+};