Method waitNumberOfVisibleElements

lib/helper/Puppeteer.js:2354–2378

* {{> waitNumberOfVisibleElements }}

(locator, num, sec)

   * {{> waitNumberOfVisibleElements }}
   */
  async waitNumberOfVisibleElements(locator, num, sec) {
    const waitTimeout = sec ? sec * 1000 : this.options.waitForTimeout
    locator = new Locator(locator, 'css')
    let waiter
    const context = await this._getContext()
    if (locator.isCSS()) {
      const visibleFn = function (locator, num) {
        const els = document.querySelectorAll(locator)
        if (!els || els.length === 0) {
          return false
        }
        return Array.prototype.filter.call(els, el => el.offsetParent !== null).length === num
      }
      waiter = context.waitForFunction(visibleFn, { timeout: waitTimeout }, locator.value, num)
    } else {
      const visibleFn = function (locator, $XPath, num) {
        eval($XPath)
        return $XPath(null, locator).filter(el => el.offsetParent !== null).length === num
      }
      waiter = context.waitForFunction(visibleFn, { timeout: waitTimeout }, locator.value, $XPath.toString(), num)
    }
    return waiter.catch(err => {
      throw new Error(`The number of elements (${locator.toString()}) is not ${num} after ${waitTimeout / 1000} sec\n${err.message}`)
    })
  }

  /**
   * {{> waitForClickable }}