没有来自数组的渲染元素-ReactJS

return 声明: 更改: sectionsItem.elements.map return sectionsItem.elements.map 你的内心 .map .地图

return (
        <div ref={this.myRef} style={this.state.myStyle} >
          {this.state.sections.map((sectionsItem: AppI.SectionI) => {
            if (this.state.activeSection === sectionsItem.name) {
              console.log("TEST :", sectionsItem.elements );
              return sectionsItem.elements.map((element: React.ReactElement<any>, index: number) => {
                return <span key={index} >{element}</span>;
              });
            }
          })}
        </div>
       );