var data = new FormData();
data.append('store_item_ID', '166713');
data.append('store_model_ID', '8573986');

var config = {
method: 'post',
url: 'https://www.decathlon.tw/zh/decathlon/twstore/getLocalStockData/',
headers: {
...data.getHeaders()
},
data : data
};

await axios(config)
.then(function (response) {
console.log(response.data);
})
.catch(function (error) {
console.log(error);
});