add type safety in Component#css() implementation

Author: zefir-git

src/Component.ts

@@ -96,11 +96,16 @@ export class Component<T extends HTMLElement = HTMLElement> extends BaseComponen
 
     public css(...args: [string, string] | [string, string, boolean] | [Record<string, string>]): typeof this {
         if (args.length === 2 || args.length === 3) {
-            const [name, value, priority] = args;
+            const name: string = args[0],
+                value: string = args[1],
+                priority: boolean = args[2] ?? false;
             this.element.style.setProperty(name, value, priority ? "important" : void 0);
         }
-        else for (const [name, value] of Object.entries(args[0]))
-            this.css(name, value);
+        else {
+            const properties: Record<string, string> = args[0];
+            for (const [name, value] of Object.entries(properties))
+                this.css(name, value);
+        }
         return this;
     }