Override Magento\Catalog\view\frontend\templates\product\view\addtocart.phtml
.
Original code:
<?php
/**
* Copyright © 2016 Magento. All rights reserved.
* See COPYING.txt for license details.
*/
// @codingStandardsIgnoreFile
/** @var $block \Magento\Catalog\Block\Product\View */
?>
<?php $_product = $block->getProduct(); ?>
<?php $buttonTitle = __('Add to Cart'); ?>
<?php if ($_product->isSaleable()): ?>
<div class="box-tocart">
<div class="fieldset">
<?php if ($block->shouldRenderQuantity()): ?>
<div class="field qty">
<label class="label" for="qty"><span><?php /* @escapeNotVerified */ echo __('Qty') ?></span></label>
<div class="control">
<input type="number"
name="qty"
id="qty"
maxlength="12"
value="<?php /* @escapeNotVerified */ echo $block->getProductDefaultQty() * 1 ?>"
title="<?php /* @escapeNotVerified */ echo __('Qty') ?>" class="input-text qty"
data-validate="<?php echo $block->escapeHtml(json_encode($block->getQuantityValidators())) ?>"
/>
</div>
</div>
<?php endif; ?>
<div class="actions">
<button type="submit"
title="<?php /* @escapeNotVerified */ echo $buttonTitle ?>"
class="action primary tocart"
id="product-addtocart-button">
<span><?php /* @escapeNotVerified */ echo $buttonTitle ?></span>
</button>
<?php echo $block->getChildHtml('', true) ?>
</div>
</div>
</div>
<?php endif; ?>
<script type="text/x-magento-init">
{
"#product_addtocart_form": {
"Magento_Catalog/product/view/validation": {
"radioCheckboxClosest": ".nested"
}
}
}
</script>
<?php if (!$block->isRedirectToCartEnabled()) : ?>
<script type="text/x-magento-init">
{
"#product_addtocart_form": {
"catalogAddToCart": {
"bindSubmit": false
}
}
}
</script>
<?php endif; ?>
Replace line 13 with:
<?php
/**
* Copyright © 2016 Magento. All rights reserved.
* See COPYING.txt for license details.
*/
// @codingStandardsIgnoreFile
/** @var $block \Magento\Catalog\Block\Product\View */
?>
<?php $_product = $block->getProduct(); ?>
<?php $buttonTitle = __('Add to Cart'); ?>
<?php if ($_product->isSaleable() && $_product->getExtensionAttributes()->getStockItem()->getQty()): ?>
<div class="box-tocart">
<div class="fieldset">
<?php if ($block->shouldRenderQuantity()): ?>
<div class="field qty">
<label class="label" for="qty"><span><?php /* @escapeNotVerified */ echo __('Qty') ?></span></label>
<div class="control">
<input type="number"
name="qty"
id="qty"
maxlength="12"
value="<?php /* @escapeNotVerified */ echo $block->getProductDefaultQty() * 1 ?>"
title="<?php /* @escapeNotVerified */ echo __('Qty') ?>" class="input-text qty"
data-validate="<?php echo $block->escapeHtml(json_encode($block->getQuantityValidators())) ?>"
/>
</div>
</div>
<?php endif; ?>
<div class="actions">
<button type="submit"
title="<?php /* @escapeNotVerified */ echo $buttonTitle ?>"
class="action primary tocart"
id="product-addtocart-button">
<span><?php /* @escapeNotVerified */ echo $buttonTitle ?></span>
</button>
<?php echo $block->getChildHtml('', true) ?>
</div>
</div>
</div>
<?php endif; ?>
<script type="text/x-magento-init">
{
"#product_addtocart_form": {
"Magento_Catalog/product/view/validation": {
"radioCheckboxClosest": ".nested"
}
}
}
</script>
<?php if (!$block->isRedirectToCartEnabled()) : ?>
<script type="text/x-magento-init">
{
"#product_addtocart_form": {
"catalogAddToCart": {
"bindSubmit": false
}
}
}
</script>
<?php endif; ?>
Notice the difference: <?php if ($_product->isSaleable() && $_product->getExtensionAttributes()->getStockItem()->getQty()): ?>