javascript - 在 Array.map() 中调用 onClick (to setAttribute) 会引发错误 TypeError: Cannot read property 'toLowerCase' of undefined

Question

我正在 Wordpress 中构建一个使用 react 的 Gutenberg 块，我想要实现的是，当单击 div 时，它应该设置带有子页面 id 的属性。array.map() 用于创建每个具有必须单击的动态值的潜水。

const { registerBlockType } = wp.blocks; // Import registerBlockType() from wp.blocks
const { RichText } = wp.editor;
const { withSelect } = wp.data;

const { Fragment, Component  } = wp.element;
const {InspectorControls, PanelColorSettings, BlockControls, BlockAlignmentToolbar,MediaUpload } = wp.editor;
const {
    RangeControl,
    SelectControl,
    TextControl,
    ToggleControl,
    Dashicon,
    IconButton,
    Button,
    Toolbar,
    PanelBody,
    RadioControl,
    TabPanel,
} = wp.components

const {
          attributes,
          setAttributes,
        } = this.props;
        const {
          subpagesArray,
          indexArray,
          align,
          currentSelected,
          displayPageExcerpt,
          displayPageIcon,
          displayPageTitle
        } = attributes;

     <section className="gosign-content-nav-block">
        {subpagesArray.map(subpage => {
            return (
                  <div className="subpage-block" onClick ={() => {setAttributes({currentSelected : subpage.id});}}  >
                       {displayPageIcon &&
                        <div className="subpage-icon">
                          <span className="accessibility">
                            <i className="material-icons">accessibility</i>
                          </span>

                         </div>
                        }
                        {displayPageTitle &&
                         <div className="subpage-title">
                            <p>{subpage.title.rendered}</p>
                         </div>
                        }
                  </div>
                )
            })}
      </section>

在我看来，这是一些“这个”参考问题。如果我能得到快速帮助，那就太好了。