Allow woocommerce to add to cart Float quantities

Woocommerce Float quantities

// Removes the WooCommerce filter, that is validating the quantity to be an int
remove_filter('woocommerce_stock_amount', 'intval');
// Add a filter, that validates the quantity to be a float
add_filter('woocommerce_stock_amount', 'floatval');

add_filter( 'woocommerce_quantity_input_step', 'mz_woocommerce_quantity_input_step', 99, 2 );

function mz_woocommerce_quantity_input_step($step, $product) {
		
  // change the "step" based on $product

  return $step;
}

== change in file: woocommerce/global/quantity-input.php ==


if ( $max_value && $min_value === $max_value ) {
	?>
	<div class="quantity hidden">
		<input type="hidden" id="<?php echo esc_attr( $input_id ); ?>" class="qty" name="<?php echo esc_attr( $input_name ); ?>" value="<?php echo esc_attr( $min_value ); ?>" />
	</div>
	<?php
} else {
	/* translators: %s: Quantity. */
	$label = ! empty( $args['product_name'] ) ? sprintf( esc_html__( '%s quantity', 'woocommerce' ), wp_strip_all_tags( $args['product_name'] ) ) : esc_html__( 'Quantity', 'woocommerce' );
	?>
	<div class="quantity d-flex flex-wrap align-items-center justify-content-center">
		<?php do_action( 'woocommerce_before_quantity_input_field' ); ?>
		<label class="screen-reader-text" for="<?php echo esc_attr( $input_id ); ?>"><?php echo esc_attr( $label ); ?></label>
		<button type="button" class="quantity_btn plus"><span class="screen-reader-text">+</span></button>
		<input
			id="<?php echo esc_attr( $input_id ); ?>"
			class="<?php echo esc_attr( join( ' ', (array) $classes ) ); ?>"
			step="<?php echo esc_attr( $step ); ?>"
			min="<?php echo esc_attr( $min_value ); ?>"
			max="<?php echo esc_attr( 0 < $max_value ? $max_value : '' ); ?>"
			name="<?php echo esc_attr( $input_name ); ?>"
			value="<?php echo esc_attr( $input_value ); ?>"
			title="<?php echo esc_attr_x( 'Qty', 'Product quantity input tooltip', 'woocommerce' ); ?>"
			size="4"
			placeholder="<?php echo esc_attr( $placeholder ); ?>"
			inputmode="<?php echo esc_attr( $inputmode ); ?>" />
		<button type="button" class="quantity_btn minus"><span class="screen-reader-text">-</span></button>
		
		<?php do_action( 'woocommerce_after_quantity_input_field' ); ?>
	</div>
	<?php
}


/** JS code to change the input **/

$('body').on('click', '.quantity_btn', function () {

		var quantityInput = $(this).closest('.quantity').find('input.qty'),
				step = parseFloat(quantityInput.attr('step') ? quantityInput.attr('step') : 1),
				max = parseFloat(quantityInput.attr('max') ? quantityInput.attr('max') : 99),
				min = parseFloat(quantityInput.attr('min') ? quantityInput.attr('min') : step),
				currentValue = parseFloat(quantityInput.val() ? quantityInput.val() : min),
				newValue = 0;
		
		
		if( $(this).hasClass('plus') ) {
			newValue = currentValue + step;
		} else {
			newValue = currentValue - step;
		}
		
		if( newValue >= min && newValue <= max ) {
			quantityInput.val(newValue).change();
		}
		
	});