Javascript 将PDF内容读取为文本字符串

所以，目前我正在尝试读取一个本地pdf文件，并将其内容转换为字符串。通过这样做，我想在页面上显示字符串。但是，当我尝试读取它时，我得到以下字符串

x��[[o]�8~���吉凯恩��$��我��.��)ڙ}X샢�感应电动机��q0？I�

const select = document.getElementById("file-selector");
  select.addEventListener("change", handleFiles, false);
    function handleFiles() {
    const fileList = this.files; /* now you can work with the file list */
    const numFile = fileList.length;

    
    for (let i = 0, numFiles = fileList.length; i < numFiles; i++) {
      const file = fileList[i];
      console.log("LOP: " + file);
      var stream = file.stream();
      console.log("CHECK: " + stream);

      readar = new FileReader();

      readar.readAsText(file);

      readar.onload = function() {
        console.log(readar.result);
      };
    
      readar.onerror = function() {
        console.log(readar.error);
      };
    }