spinner on modal only lwc
<div role="dialog" tabindex="-1" class="slds-modal slds-fade-in-open">
<div class="slds-modal__container " style="width:100%;">
<div class="slds-modal__header">
<h2 class="slds-text-heading--medium">Test</h2>
</div>
<div class="slds-modal__content slds-p-around--medium slds-is-relative">
<div class="slds-spinner_container">
<div class="slds-spinner--brand slds-spinner slds-spinner--small" role="alert">
<span class="slds-assistive-text">Loading...</span>
<div class="slds-spinner__dot-a"></div>
<div class="slds-spinner__dot-b"></div>
</div>
</div> ...