WordPress at a glance
filter is not described

emoji_svg_ext filter-hook . WP 4.6.0

Filters the extension of the emoji SVG files.

Usage

add_filter( 'emoji_svg_ext', 'filter_function_name_5104' );
function filter_function_name_5104( $string ){
	// filter...

	return $string;
}
$string(string)
The emoji extension for svg files. Default .svg.

Where the hook is called

_print_emoji_detection_script()
wp-includes/formatting.php 5064
'svgExt' => apply_filters( 'emoji_svg_ext', '.svg' ),

Where the hook is used (in WP core)

Does not used.