@pluginarch/create-parch/templates/material/dist/index.es.mjs

this is way to create a ui project

class t extends BaseElement {
  constructor() {
    super();
    const e = document.createElement("template");
    e.innerHTML = `
        <style>
          :host {
            display: block;
            border: 1px solid #ccc;
            padding: 10px;
            font-family: 'Arial', sans-serif;
          }
        </style>
        <slot></slot> <!-- 这里可以插入内容 -->
      `, this.shadow.appendChild(e.content.cloneNode(!0));
  }
}
customElements.define("pe-test", t);