How to use the @lrnwebcomponents/haxcms-elements/lib/core/haxcms-site-store.js.store.siteTitle function in @lrnwebcomponents/haxcms-elements

currentdate.getMinutes() +
      ":" +
      currentdate.getSeconds();
    let element = document.createElement("div");
    element.innerHTML = `
<style>
  @media print {
    body {
      padding: 0 15px 5px;
      color: #000;
      background-color: #ffffff;
      border-top: 1px solid #aaa;
    }
  }
</style>
<h1>${store.siteTitle}</h1>

<p>${datetime}</p>
${content}`;
    // From https://stackoverflow.com/questions/1071962/how-do-i-print-part-of-a-rendered-html-page-in-javascript#answer-1072151
    let print = window.open(
      "",
      "",
      "left=0,top=0,width=800,height=800,toolbar=0,scrollbars=0,status =0"
    );
    // ensure base tag moves with it if set
    if (document.head.getElementsByTagName("base")) {
      let base = document.createElement("base");
      base.href = document.head
        .getElementsByTagName("base")[0]
        .getAttribute("href");
      print.document.head.appendChild(base);

autorun(reaction => {
      this.siteTitle = toJS(store.siteTitle);
      this.__disposer.push(reaction);
    });
    autorun(reaction => {

autorun(reaction => {
      this.siteTitle = toJS(store.siteTitle);
      this.__disposer.push(reaction);
    });
  }