Replace the Variable Price range by the chosen variation price in WooCommerce 4+

Update March 2021 (Works at least from WooCommerce 3.7 up to 5+)

The code:

add_action('woocommerce_before_add_to_cart_form', 'selected_variation_price_replace_variable_price_range');
function selected_variation_price_replace_variable_price_range(){
    global $product;

    if( $product->is_type('variable') ):
    ?><style> .woocommerce-variation-price {display:none;} </style>
    <script>
    jQuery(function($) {
        var p = 'p.price'
            q = $(p).html();

        $('form.cart').on('show_variation', function( event, data ) {
            if ( data.price_html ) {
                $(p).html(data.price_html);
            }
        }).on('hide_variation', function( event ) {
            $(p).html(q);
        });
    });
    </script>
    <?php
    endif;
}

Code goes in functions.php file of the active child theme (or active theme). Tested and works.

To make it work with Woocommerce 3.8 you will need to replace the following line:

 $('select').blur( function(){

$('input.variation_id').change( function(){

Updated Code:

// Utility function to get the default variation (if it exist)
function get_default_variation( $product ){
    $attributes_count = count($product->get_variation_attributes());
    $default_attributes = $product->get_default_attributes();
    // If no default variation exist we exit
    if( $attributes_count != count($default_attributes) )
        return false;

    // Loop through available variations
    foreach( $product->get_available_variations() as $variation ){
        $found = true;
        // Loop through variation attributes
        foreach( $variation['attributes'] as $key => $value ){
            $taxonomy = str_replace( 'attribute_', '', $key );
            // Searching for a matching variation as default
            if( isset($default_attributes[$taxonomy]) && $default_attributes[$taxonomy] != $value ){
                $found = false;
                break;
            }
        }
        // If we get the default variation
        if( $found ) {
            $default_variaton = $variation;
            break;
        }
        // If not we continue
        else {
            continue;
        }
    }
    return isset($default_variaton) ? $default_variaton : false;
}

add_action( 'woocommerce_before_single_product', 'move_variations_single_price', 1 );
function move_variations_single_price(){
    global $product, $post;

    if ( $product->is_type( 'variable' ) ) {
        // removing the variations price for variable products
        remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_price', 10 );

        // Change location and inserting back the variations price
        add_action( 'woocommerce_single_product_summary', 'replace_variation_single_price', 10 );
    }
}

function replace_variation_single_price(){
    global $product;

    // Main Price
    $prices = array( $product->get_variation_price( 'min', true ), $product->get_variation_price( 'max', true ) );
    $active_price = $prices[0] !== $prices[1] ? sprintf( __( 'From: %1$s', 'woocommerce' ), wc_price( $prices[0] ) ) : wc_price( $prices[0] );

    // Sale Price
    $prices = array( $product->get_variation_regular_price( 'min', true ), $product->get_variation_regular_price( 'max', true ) );
    sort( $prices );
    $regular_price = $prices[0] !== $prices[1] ? sprintf( __( 'From: %1$s', 'woocommerce' ), wc_price( $prices[0] ) ) : wc_price( $prices[0] );

    if ( $active_price !== $regular_price && $product->is_on_sale() ) {
        $price = '<del>' . $regular_price . $product->get_price_suffix() . '</del> <ins>' . $active_price . $product->get_price_suffix() . '</ins>';
    } else {
        $price = $regular_price;
    }

    // When a default variation is set for the variable product
    if( get_default_variation( $product ) ) {
        $default_variaton = get_default_variation( $product );
        if( ! empty($default_variaton['price_html']) ){
            $price_html = $default_variaton['price_html'];
        } else {
            if ( ! $product->is_on_sale() )
                $price_html = $price = wc_price($default_variaton['display_price']);
            else
                $price_html = $price;
        }
        $availiability = $default_variaton['availability_html'];
    } else {
        $price_html = $price;
        $availiability = '';
    }
    // Styles ?>
    <style>
        div.woocommerce-variation-price,
        div.woocommerce-variation-availability,
        div.hidden-variable-price {
            height: 0px !important;
            overflow:hidden;
            position:relative;
            line-height: 0px !important;
            font-size: 0% !important;
        }
    </style>
    <?php // Jquery ?>
    <script>
    jQuery(document).ready(function($) {
        var a = 'div.wc-availability', p = 'p.price';

        $('input.variation_id').change( function(){
            if( '' != $('input.variation_id').val() ){
                if($(a).html() != '' ) $(a).html('');
                $(p).html($('div.woocommerce-variation-price > span.price').html());
                $(a).html($('div.woocommerce-variation-availability').html());
            } else {
                if($(a).html() != '' ) $(a).html('');
                $(p).html($('div.hidden-variable-price').html());
            }
        });
    });
    </script>
    <?php

    echo '<p class="price">'.$price_html.'</p>
    <div class="wc-availability">'.$availiability.'</div>
    <div class="hidden-variable-price" >'.$price.'</div>';
}

Hope it helps!

Replace the Variable Price range by the chosen variation price in WooCommerce 4+

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