code: function doProductPage(product) {
  	let res = http.get(product.url);
  	check(res, {
  		"title is correct": (res) => res.html("title").text() == product.title,
  	});
  	if (Math.random() <= product.chance) {
  		let formBuildID = res.body.match('name="form_build_id" value="(.*)"')[1];
  		let formID = res.body.match('name="form_id" value="(.*)"')[1];
  		let formToken = res.body.match('name="form_token" value="(.*)"')[1];
  		let productID = res.body.match('name="product_id" value="(.*)"')[1];
  		group("add to cart", function() { 
  			addProductToCart(product.url, productID, formID, formBuildID, formToken)
  		});
  	}
  }
docs: Load product page and potentially add product to cart