add contentScale prop

docs/props.mdx

@@ -280,3 +280,13 @@ Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like
 ### `allowWebViewZoom`
 
 Controls whether the embedded webview allows user to zoom in. Defaults to `false`
+
+---
+
+### `contentScale`
+
+scale factor for initial-scale and maximum-scale in `<meta />` tag on the webpage. Defaults to `1.0`
+
+:::info zoom -
+enabling the `allowWebViewZoom` disabled the maximum-scale attribute in the webpage
+:::

index.d.ts

@@ -122,6 +122,11 @@ export interface YoutubeIframeProps {
    * Set this React Ref to use ref functions such as getDuration.
    */
   ref?: React.MutableRefObject<YoutubeIframeRef | null>;
+  /**
+   * scale factor for initial-scale and maximum-scale in
+   * <meta /> tag on the webpage
+   */
+  contentScale?: Number;
 }
 
 export interface YoutubeMeta {

src/PlayerScripts.js

@@ -66,6 +66,7 @@ export const MAIN_SCRIPT = (
   playList,
   initialPlayerParams,
   allowWebViewZoom,
+  contentScale,
 ) => {
   const {
     end,
@@ -93,12 +94,13 @@ export const MAIN_SCRIPT = (
   const showClosedCaptions_s = showClosedCaptions ? 1 : 0;
   const list = typeof playList === 'string' ? playList : '';
   const listType = typeof playList === 'string' ? 'playlist' : '';
+  const contentScale_s = typeof contentScale === 'number' ? contentScale : 1.0;
 
-  // scale will either be "initial-scale=0.8"
-  let scale = 'initial-scale=0.8';
+  // scale will either be "initial-scale=1.0"
+  let scale = `initial-scale=${contentScale_s}`;
   if (allowWebViewZoom) {
-    // or "initial-scale=0.8, maximum-scale=0.8"
-    scale += ', maximum-scale=0.8';
+    // or "initial-scale=0.8, maximum-scale=1.0"
+    scale += `, maximum-scale=${contentScale_s}`;
   }
 
   return `

src/YoutubeIframe.js

@@ -29,6 +29,7 @@ const YoutubeIframe = (props, ref) => {
     webViewStyle,
     webViewProps,
     playbackRate = 1,
+    contentScale = 1.0,
     onError = _err => {},
     onReady = _event => {},
     playListStartIndex = 0,
@@ -180,6 +181,7 @@ const YoutubeIframe = (props, ref) => {
             playList,
             initialPlayerParams,
             allowWebViewZoom,
+            contentScale,
           ),
         }}
         userAgent={