37 lines
1.1 KiB
JavaScript
37 lines
1.1 KiB
JavaScript
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/**
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* File responsive-embeds.js.
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*
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* Make embeds responsive so they don't overflow their container.
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*/
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/**
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* Add max-width & max-height to <iframe> elements, depending on their width & height props.
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*
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* @since Twenty Twenty-One 1.0
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*
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* @return {void}
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*/
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function twentytwentyoneResponsiveEmbeds() {
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var proportion, parentWidth;
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// Loop iframe elements.
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document.querySelectorAll( 'iframe' ).forEach( function( iframe ) {
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// Only continue if the iframe has a width & height defined.
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if ( iframe.width && iframe.height ) {
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// Calculate the proportion/ratio based on the width & height.
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proportion = parseFloat( iframe.width ) / parseFloat( iframe.height );
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// Get the parent element's width.
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parentWidth = parseFloat( window.getComputedStyle( iframe.parentElement, null ).width.replace( 'px', '' ) );
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// Set the max-width & height.
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iframe.style.maxWidth = '100%';
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iframe.style.maxHeight = Math.round( parentWidth / proportion ).toString() + 'px';
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}
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} );
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}
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// Run on initial load.
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twentytwentyoneResponsiveEmbeds();
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// Run on resize.
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window.onresize = twentytwentyoneResponsiveEmbeds;
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