wp-includes/embed.php:1103Prints the JavaScript in the embed iframe header.
function print_embed_scripts() { $js_path = '/js/wp-embed-template' . wp_scripts_get_suffix() . '.js'; wp_print_inline_script_tag( trim( file_get_contents( ABSPATH . WPINC . $js_path ) ) . "\n//# sourceURL=" . esc_url_raw( includes_url( $js_path ) ) );}Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/embed.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.