How do I enqueue a js file in functions.php for a if lt IE 9 statement?

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I’m coding a theme that uses the Twitter Bootstrap 3 files and in the header I want to include: 

<!--[if lt IE 9]>
 <script src="<?php echo get_stylesheet_directory_uri(); ?>/js/html5shiv.js"></script>
  <script src="<?php echo get_stylesheet_directory_uri(); ?>/js/respond.min.js"></script>
<![endif]-->

I’ve been told by a theme reviewer that I can’t put it in the header file (only one js is allowed).

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Required: Theme can include only one JS within header.php, please enqueue the additional > respond.min.js using the hook wp_enqueue_scripts in functions.php

as it is I have to enqueue it, but I don’t know how to do this in a way that put’s it in the “if it IE 9” statement.

Please could someone help me?
Thanks

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1 comment

  1. You can do it in two ways….

    Solution One: 

    <?php
add_action( 'wp_head', 'myscript' );
function myscript(){
   echo '<!--[if lt IE 9]><script src="your_js_file_path"></script><![endif]-->';
};
?>

    Solution Two:

    <?php 
global $wp_scripts;
wp_register_script( 'jsFileIdentifier', 'YourJsFilePath',  array(),  '3.6.2' );
$wp_scripts->add_data( 'jsFileIdentifier', 'conditional', 'lt IE 9' );
?>