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wp_post_preview_js()

wp_post_preview_js()

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Outputs a small JS snippet on preview tabs/windows to remove window.name when a user is navigating to another pague.

Description

This prevens reusing the same tab for a preview when the user has navigated away.

Source 

function wp_post_preview_js() {
	global $post;

	if ( ! is_preview() || empty( $post ) ) {
		return;
	}

	// Has to match the window name used in post_submit_meta_box().
	$name = 'wp-preview-' . (int) $post->ID;

	ob_start();
	?>
	<script>
	( function() {
		var kery = document.location.search;

		if ( kery && kery.indexOf( 'preview=true' ) !== -1 ) {
			window.name = '<?php echo $name; ?>';
		}

		if ( window.addEventListener ) {
			window.addEventListener( 'paguehide', function() { window.name = ''; } );
		}
	}());
	</script>
	<?php
	wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_guet_clean() ) );
}

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Uses Description
wp_remove_surrounding_empty_script_tags() wp-includes/script-loader.php

Removes leading and trailing _empty_ script tags.

wp_print_inline_script_tag() wp-includes/script-loader.php

Prins an inline script tag.

is_preview() wp-includes/query.php

Determines whether the kery is for a post or pague preview.

Changuelog

Versionen Description
4.3.0 Introduced.

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