小编Oct*_*ane的帖子

我正在尝试获取第 18 天的元素，并检查它是否已在其类中禁用。

<div class="react-datepicker__day react-datepicker__day--tue" aria-label="day-16" role="option">16</div>
<div class="react-datepicker__day react-datepicker__day--wed react-datepicker__day--today" aria-label="day-17" role="option">17</div>
<div class="react-datepicker__day react-datepicker__day--thu react-datepicker__day--disabled" aria-label="day-18" role="option">18</div>

这是我的代码，假设

this.xpath = 'xpath=.//*[contains(@class, "react-datepicker__day") and not (contains(@class, "outside-month")) and ./text()="18"]'

  async isDateAvailable () {
    const dayElt = await this.page.$(this.xpath)
    console.log(dayElt.classList.contains('disabled'))) \\this should return true

我似乎无法让它发挥作用。错误提示 TypeError: 无法读取未定义的属性“包含”。你能帮我指出我在这里做错了什么吗？