can any one explain the price logic ? Magento 2

[bharath553]

Hi guys, actually am trying to apply the price logic to product description  to get the child description when am going to click a swatch. For that  i need to understand the below code 

can any one explain it ?

<script>
require([
'jquery',
'priceBox'
], function($){
var dataPriceBoxSelector = '[data-role=priceBox]',
dataProductIdSelector = '[data-product-id=<?= $block->escapeHtml($_product->getId()) ?>]',
priceBoxes = $(dataPriceBoxSelector + dataProductIdSelector);
priceBoxes = priceBoxes.filter(function(index, elem){
return !$(elem).find('.price-from').length;
});
priceBoxes.priceBox({'priceConfig': <?= /* @escapeNotVerified */ $block->getJsonConfig() ?>});
});
</script>

[Rakesh Jesadiya · Accepted solution]

Below price logic is used for only Bundle products.

dataPriceBoxSelector is used for getting  DOM of '[data-role=priceBox]'

dataProductIdSelector is getting DOM with [data-product-id=prodctId]

PriceBoxes is used for fetch Object of concatenating of dataPriceBoxSelector and dataProductIdSelector.

So your jQuery object look like  jQuery('[data-role=priceBox][data-product-id=45]') where 45 is your product id.

Now based on the above criteria below condition skip the div with class price-box.price-final_price, in bundle product. price-box.price-final_price DOM element used for display static price in bundle product like, 

From
$99.00
To
$489.00

So When priceBox Js is called at that time, skip the Dom for Static price display in bundle product using below condition,

pricesBoxes = priceBoxes.filter(function(index, elem){
      return !$(elem).find('.price-from').length;
});

and pass only Price Div which contains dynamic value based on bundle option changes.

So above logic is used for only bundle product with Div has price-box price-final_price class to skip it and only valid div class wil be pass using priceBox js with product value.