https://shirinbeauty.com/cdn/shop/t/9/assets/template-blog.js?v=84129518808472154601789726430

1class LinkDropdown extends HTMLElement {
2  constructor() {
3    super();
4
5    this.select = this.querySelector('#filter-by');
6    this.blogUrl = this.select.dataset.blogUrl;
7
8    this.select.addEventListener('change', this.onSelectChange.bind(this));
9  }
10
11  onSelectChange() {
12    if (this.select.value.length > 0) {
13      window.location.href = this.blogUrl + '/tagged/' +  this.select.value;
14    }
15    else window.location.href = this.blogUrl;
16  }
17}
18
19customElements.define("link-dropdown", LinkDropdown);