Coupon field gone when i disable optimizing cart/checkout

OK, but just above that you also have “Aggregate JS-files?”, what happens when you uncheck that?

Coupn not showing ??

OK, as it works when CSS optimization is on and CSS optimization is not risky to do on cart/ checkout, I propose to keep the “optimize cart”-option checked and to use the following code snippet to disable JS optimization on cart & checkout;

add_filter('autoptimize_filter_js_noptimize','mfiii_js_noptimize');
function mfiii_js_noptimize() {
    if ( ( function_exists('is_checkout') && is_checkout() ) || ( function_exists('is_cart') && is_cart() ) ) {
        return true;
    } else {
        return false;
    }
}

fingers crossed ??
frank

So only js needs to be dynamic?

THis code goes to functions.php ?

So only js needs to be dynamic?

well, given your test results, optimizing CSS was enough to allow the coupon field to be seen, so indeed the code snippet disables JS optimization for cart/ checkout.

THis code goes to functions.php ?

I generally recommend using the code snippets plugin, but it should work in functions.php as well yes.

Ok thanks.

Btw, i tested the checkout page since yesterday with the last checkbox enabled, and seems that checkout page works without problem. Is that possible? It has dynamic content

I put the code and coupon not showing! So js must be enabled..

Darn, that’s a bummer! :-/

Next question: based on your un-optimized HTML you have a plugin that is adding a defer-flag to your JavaScript (in a wrong fashion even), e.g.

<script type='text/javascript' src='https://lolday.gr/wp-content/plugins/woocommerce/assets/js/frontend/cart-fragments.min.js' defer '></script>

Guess that’s a plugin, can you deactivate that?

Hmm which plugin? How can i find it?

that I don’t know mf_iii, I can only see the result (the defer flag). if you have no idea you’ll probably have to disable/enable plugins one at a time (with JS optimization off) and check the HTML source for presence of that defer flag.

This defer flag is probably what is the reason for the issue;
* you have inline JS that depends on linked JS-files, but the linked JS is loaded late (due to defer), so the inline JS breaks (I see some inline JS targetting the coupon field)
* when AO JS optimization is active with “also aggregate inline JS”, the linked JS-files are no longer aggregated and all is executed in the correct order

frank