Enqueueing IE conditional stylesheets in WordPress the right way

functions-conditional-enqueueing.php

<?php

add_action( 'wp_enqueue_scripts', 'enqueue_my_styles_and_scripts' );
/**
 * Enqueue styles and scripts conditionally.
 *
 * Load stylesheets and scripts specifically for IE. IE10 and above does
 * not support conditional comments in standards mode.
 *
 * @link https://msdn.microsoft.com/en-us/library/ms537512(v=vs.85).aspx
 */
function enqueue_my_styles_and_scripts() {

    // Internet Explorer specific stylesheet.
    wp_enqueue_style( 'themename-ie', get_stylesheet_directory_uri() . '/css/ie.css', array( 'twentyfifteen-style' ), '20141010' );
    wp_style_add_data( 'themename-ie', 'conditional', 'lte IE 9' );

    // Internet Explorer 7 specific stylesheet.
    wp_enqueue_style( 'themename-ie7', get_stylesheet_directory_uri() . '/css/ie7.css', array( 'twentyfifteen-style' ), '20141010' );
    wp_style_add_data( 'themename-ie7', 'conditional', 'lt IE 8' );

     // Internet Explorer HTML5 support 
    wp_enqueue_script( 'html5shiv',get_template_directory_uri().'/js/html5shiv.js', array(), '3.7.3', false);
    wp_script_add_data( 'html5shiv', 'conditional', 'lt IE 9' );

    // Internet Explorer 8 media query support
    wp_enqueue_script( 'respond', get_template_directory_uri().'/js/respond.js', array(), '1.4.2', false);
    wp_script_add_data( 'respond', 'conditional', 'lt IE 9' );

}

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