Note! when selecting clickable elements you should select them by moving the mouse over the element and pressing "S". This kind of selection will avoid events triggered by the button.
Click Once type will click on the buttons only once. If a new button appears that can be selected it will be also clicked. For example pagination links might show pages 1 to 5 but pages 6 to 10 would appear some time later. The selector will also click on those buttons.
Click More type makes the selector click on given buttons multiple times until there are no new elements appearing. A new element is considered an element that has unique text content.
When using Click Once only unique buttons will be clicked. When using Click More this helps to ignore buttons that don't generate more elements.
Unique CSS Selector - buttons with identical CSS Selector are considered equal
Never discard - scrapes data before and after click action
For example there is a site that displays a list of items and there are some pagination buttons that reload these items dynamically (after clicking a button the url doesn't change. changes after hash tag # doesn't count). Using Element click selector you can select these items and buttons that need to be clicked. The scraper during scraping phase will click these buttons to extract all elements. Also you need to add child selectors for the Element click selector that select data within each element. In figure 1 you can see how to configure the Element click selector to extract data from the described site.
This example is similar to the one above. The only difference is that in this site items are loaded by clicking a single button multiple times. In this case the Element click selector should be configured to use "Click more" click type. In figure 2 you can see how to configure the Element click selector to extract data from this site.
The Discard when click element exists option is picked when, for example, product pages, of an e-commerce website, that are being scraped have an almost identical structure, with the only differentiator being the presence of a variation option (size, color, quantity, etc.) that has to be iterated through in the product page.
Due to the fact that the scraper will collect data before and after the click, by not having this option selected scraping a page with multiple variations available, the scraper will extract information before initiating the click and during the clicking process, resulting in duplicate or unusable row of data.