WooCommerce删除我添加到产品简短描述的自定义jQuery代码

I'm developing an eCommerce site with WordPress+WooCommerce.

I added buttons to certain products in the Short Description field in order to quickly select certain number of products to be added in the cart (this is because I have different offers, for example: "Buy 4 for the price of 3").

I have a script like this in the general jquery file:

<script>
    function pack4() { document.getElementById("quantity").value = "4"; }
    function pack8() { document.getElementById("quantity").value = "8"; }
</script>

And this is an example of the code I have in some products Short Description:

<span><strong>4x3 Pack:</strong>TOTAL<strong>$1800</strong></span>
<button class="select" onclick="pack4()">Select</button>

Everything works and whenever you click on every button the order quantity adds the corresponding number.

The thing is: Whenever my client (who usually edits products) click on the Text/Visual flap of Short Description, the onclick="pack4()" code disappears. I guess WordPress/WooCommerce have got some jQuery filter that erases this kind of codes. I need it to stop doing that, because the client regularly edits things (and of course they don't know anything about coding). Otherwise, I have to add the code again every time.

I also suspect WP/WC also filters it without needing to click on this Text/Visual flap (but I might be wrong about that).

Anyone knows what to do?
Thanks!

The easiest and accurate way is to create a custom shortcode this way:

if( !function_exists('display_product_button_pack') ) {

    function display_product_button_pack( $atts ) {

        // Shortcode Attributes
        $atts = shortcode_atts(
            array(
                'pack' => '4', // default pack is 4
            ),
            $atts,
            'button_pack'
        );

        $output = '<button class="select" onclick="pack'.$atts['pack'].'()">Select</button>';

        return $output;

    }

    add_shortcode( 'button_pack', 'display_product_button_pack' );
}

Code goes in function.php file of your active child theme (or theme) or also in any plugin file.

The code is tested and works.

USAGE:

There is an optional pack argument in your shortcode, which default value is 4…

For your Pack 8 for example, you will insert this in the short description product editor:

[button_pack pack="8"]

This will output this html:

<button class="select" onclick="pack8()">Select</button>

For the Pack 4, as default argument value is already 4 you just use this:

[button_pack]