ligisayan,
значит нет у вас ничего в variations_form на момент проверки
иначе всё нормально выводится
вывод третьего элемента массива
var variations_form = [{
"variation_id": 3354,
"variation_is_visible": true,
"variation_is_active": true,
"is_purchasable": true,
"display_price": 260000,
"display_regular_price": 260000,
"attributes": {
"attribute_pa_size": "large"
},
"image_src": "",
"image_link": "",
"image_title": "",
"image_alt": "",
"price_html": "<span class=\"price\"><span class=\"amount\">260.000 руб.<\/span><\/span>",
"availability_html": "",
"sku": "",
"weight": " kg",
"dimensions": "",
"min_qty": 1,
"max_qty": "",
"backorders_allowed": false,
"is_in_stock": true,
"is_downloadable": false,
"is_virtual": false,
"is_sold_individually": "no"
}, {
"variation_id": 3355,
"variation_is_visible": true,
"variation_is_active": true,
"is_purchasable": true,
"display_price": 160000,
"display_regular_price": 160000,
"attributes": {
"attribute_pa_size": "medium"
},
"image_src": "",
"image_link": "",
"image_title": "",
"image_alt": "",
"price_html": "<span class=\"price\"><span class=\"amount\">160.000 руб.<\/span><\/span>",
"availability_html": "",
"sku": "",
"weight": " kg",
"dimensions": "",
"min_qty": 1,
"max_qty": "",
"backorders_allowed": false,
"is_in_stock": true,
"is_downloadable": false,
"is_virtual": false,
"is_sold_individually": "no"
}, {
"variation_id": 3356,
"variation_is_visible": true,
"variation_is_active": true,
"is_purchasable": true,
"display_price": 80000,
"display_regular_price": 80000,
"attributes": {
"attribute_pa_size": "small"
},
"image_src": "",
"image_link": "",
"image_title": "",
"image_alt": "",
"price_html": "<span class=\"price\"><span class=\"amount\">80.000 руб.<\/span><\/span>",
"availability_html": "",
"sku": "",
"weight": " kg",
"dimensions": "",
"min_qty": 1,
"max_qty": "",
"backorders_allowed": false,
"is_in_stock": true,
"is_downloadable": false,
"is_virtual": false,
"is_sold_individually": "no"
}]
alert(variations_form[2]['price_html']);