Method deselectByIndex

javascript/selenium-webdriver/lib/select.js:394–422

* * @param {Number} index index of option element to deselect * Deselect the option at the given index. * This is done by examining the "index" * attribute of an element, and not merely by counting. * @returns {Promise }

(index)

   * @returns {Promise<void>}
   */
  async deselectByIndex(index) {
    if (!(await this.isMultiple())) {
      throw new Error('You may only deselect options of a multi-select')
    }

    if (index < 0) {
      throw new Error('Index needs to be 0 or any other positive number')
    }

    let options = await this.element.findElements(By.tagName('option'))

    if (options.length === 0) {
      throw new Error("Select element doesn't contain any option element")
    }

    if (options.length - 1 < index) {
      throw new Error(
        `Option with index "${index}" not found. Select element only contains ${options.length - 1} option elements`,
      )
    }

    for (let option of options) {
      if ((await option.getAttribute('index')) === index.toString()) {
        if (await option.isSelected()) {
          await option.click()
        }
      }
    }
  }

  /**
   *