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avoid npe on iframe postMessage

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This commit is contained in:
Hakim El Hattab 2017-03-14 09:06:39 +01:00
parent b143e5976b
commit 7e6fb9ec87
1 changed files with 3 additions and 3 deletions
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6
js/reveal.js
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@ -3377,20 +3377,20 @@
// Generic postMessage API for non-lazy loaded iframes // Generic postMessage API for non-lazy loaded iframes
toArray( element.querySelectorAll( 'iframe' ) ).forEach( function( el ) { toArray( element.querySelectorAll( 'iframe' ) ).forEach( function( el ) {
el.contentWindow.postMessage( 'slide:stop', '*' ); if( el.contentWindow ) el.contentWindow.postMessage( 'slide:stop', '*' );
el.removeEventListener( 'load', startEmbeddedIframe ); el.removeEventListener( 'load', startEmbeddedIframe );
}); });
// YouTube postMessage API // YouTube postMessage API
toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) { toArray( element.querySelectorAll( 'iframe[src*="youtube.com/embed/"]' ) ).forEach( function( el ) {
if( !el.hasAttribute( 'data-ignore' ) && typeof el.contentWindow.postMessage === 'function' ) { if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' ); el.contentWindow.postMessage( '{"event":"command","func":"pauseVideo","args":""}', '*' );
} }
}); });
// Vimeo postMessage API // Vimeo postMessage API
toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) { toArray( element.querySelectorAll( 'iframe[src*="player.vimeo.com/"]' ) ).forEach( function( el ) {
if( !el.hasAttribute( 'data-ignore' ) && typeof el.contentWindow.postMessage === 'function' ) { if( !el.hasAttribute( 'data-ignore' ) && el.contentWindow && typeof el.contentWindow.postMessage === 'function' ) {
el.contentWindow.postMessage( '{"method":"pause"}', '*' ); el.contentWindow.postMessage( '{"method":"pause"}', '*' );
} }
}); });