Docs: updating README with a Polyfills anchor

stevematney · web-flow · commit 199559f4647b · 2020-04-08T13:33:13.000-06:00
diff --git a/README.md b/README.md
@@ -59,6 +59,7 @@ customElements.define('incrementer', ReactTestComponent);
 
 The key pieces of code are `... extends ReactHTMLElement` and `this.mountPoint`.
 
+> ### Polyfills
 > One thing to remember is that you will need to load [the webcomponentsjs polyfills](https://www.webcomponents.org/polyfills) for `ReactHTMLElement` to work in all browsers. Be sure to include [the ES5 adapter](https://github.com/webcomponents/polyfills/tree/master/packages/webcomponentsjs#custom-elements-es5-adapterjs), as we currently transpile `ReactHTMLElement` down to ES5. The polyfills should be in the `<head>`, and should look something like this:
 >
 > ```html

Original file line number	Diff line number	Diff line change
`@@ -59,6 +59,7 @@ customElements.define('incrementer', ReactTestComponent);`
`59`	`59`
`60`	`60`	The key pieces of code are `... extends ReactHTMLElement` and `this.mountPoint`.
`61`	`61`
	`62`	`+> ### Polyfills`
`62`	`63`	> One thing to remember is that you will need to load [the webcomponentsjs polyfills](https://www.webcomponents.org/polyfills) for `ReactHTMLElement` to work in all browsers. Be sure to include [the ES5 adapter](https://github.com/webcomponents/polyfills/tree/master/packages/webcomponentsjs#custom-elements-es5-adapterjs), as we currently transpile `ReactHTMLElement` down to ES5. The polyfills should be in the `<head>`, and should look something like this:
`63`	`64`	`>`
`64`	`65`	> ```html