Search And Filter array for vue.js

Filter.js

//productList = array of object 
let productList = [{
    Price: 500 , ProductName : "Test"
},{
    Price: 200 , ProductName : "Test -2"
}];

if (this.searchKey != "") {
    productList = this.products.filter((post) => {
      return post.ProductName.toLowerCase().includes(
        this.searchKey.toLowerCase()
      );
    });
}

if (this.short == "high") {
    productList = productList.sort(
      (a, b) => parseFloat(b.Price) - parseFloat(a.Price)
    );
}

if (this.short == "low") {
    productList = productList.sort(
      (a, b) => parseFloat(a.Price) - parseFloat(b.Price)
    );
}

if (this.short == "a-z") {
    productList = productList.sort(function (a, b) {
      if (a.ProductName < b.ProductName) return -1;
      else if (a.ProductName > b.ProductName) return 1;
      return 0;
    });
}

if (this.short == "z-a") {
    productList = productList.sort(function (a, b) {
      if (a.ProductName > b.ProductName) return -1;
      else if (a.ProductName < b.ProductName) return 1;
      return 0;
    });
}