Selenium: form switching

Forms

1. It is an element with a webpage tag named frame or iframe. The form references links to other pages. The real page data does not appear in the source code, but it can be seen in the browser, similar to multiple windows in the browser.
1. The form mentioned here is not a form tag in HTML, but a frame or iframe tag.
2. The frame and iframe tags are a form frame in the HTML page.Page Elements

2. frame or iframe tag indicates that another page is embedded in the current page (referenced by URL link).Therefore, it is equivalent to two pages displayed in the same window
⑴ ⑴ The source code and elements in these two pages are separated
⑵ ⑵Layer page: is the main page we see (for pages containing frame, iframe tags)
  ⑶Inner layerPage: is the page embedded in the outer page (the page in the frame, iframe tag)
  ⑷frame or iframeThe label belongs to the outer page, and the part enclosed by these two labels is the inner page.

3. When using Selenium's WebDriver object to locate elements of such pages (with frame and iframe tags), The WebDriver object operates the outer layer by default.page.Elements in the form cannot be positioned directly
  ⑴ At this time, if you need to position the elements in the frame and iframe tags, you need to switch to the form page and then position them

4. This is actually the same as the "window switching" introduced earlier.