init

src/index.ts

@@ -0,0 +1,15 @@
+export function injectStyles(shadowRootElement: HTMLElement, insertBeforeSelector: string, styles: string) {
+	let root              = shadowRootElement.shadowRoot;
+	let styleAlreadyAdded = false;
+	let currentStyleTags  = Array.from(root.querySelectorAll('style'));
+	currentStyleTags.forEach((element: HTMLStyleElement, index) => {
+		if (element.innerHTML == styles) {
+			styleAlreadyAdded = true;
+		}
+		if ((currentStyleTags.length - 1) == index && styleAlreadyAdded == false) {
+			let newStyleTag       = document.createElement('style');
+			newStyleTag.innerHTML = styles;
+			root.insertBefore(newStyleTag, root.querySelector(insertBeforeSelector));
+		}
+	});
+}