resize, min_width

資料來源：
httpsss://www.tiny.cloud/docs/configure/editor-appearance/

tinymce.init({
  selector: 'textarea',  // change this value according to your HTML
  resize: false
});

tinymce.init({
  selector: 'textarea',  // change this value according to your HTML
  resize: 'both'
});

tinymce.init({
  selector: 'textarea',  // change this value according to your HTML
  min_width: 400
});

tinymce.init({
  selector: 'textarea',  // change this value according to your HTML
  max_width: 500
});