Ant table中 字段过长溢出显示...时，鼠标滑过显示隐藏内容

 renderToptipCol(text: any) {
    const texts = text
    let textof = null
    if (texts !== null && texts !== undefined) {
      if (texts.length > 20) {
        textof = texts.substring(20) + '...'
      } else {
        textof = texts
      }
    }

    return <a-tooltip title={text}>{textof} </a-tooltip>
  }