Selenium: JS operation

JavaScript

1. JavaScript is the programming language of the Web, and all modern HTML pages will use JavaScriptp>

2. A complete web page is composed of HTML, CSS, JavaScript, etc.
⑴HTML: equivalent to the skeleton, which determines the basic structure of the web page
⑵CSS: equivalent to the performance, determines the presentation form of the web page
⑶JavaScript: equivalent to action, determines what the web page can do

3. Compare a webpage to a person
⑴HTML is the person's skeleton (determines the person's frame)
⑵CSS is the person's skin, hair, etc. (determines the person's appearance)
⑶ JavaScript is the action of this person (raise hand, kick, etc.)

Operating JS in Selenium

1. WebDriver simulates the operation of end users, that is to say, the operation (actual operation) that the user can complete under normal circumstances can be simulated through the API provided by WebDriver

2, but in actual WEB applications, not all elements can be operated by users, so using WebDriver can not directly simulate operations; or WebDriver does not provide interface methods for corresponding operations
⑴ Elements are written in JSThe
⑵ Element is invisible
⑶ Element cannot be clicked
⑷ Modify element attributes (WebDriver does not provide the corresponding interface method)
⑸ Browser scroll bar (WebDriver does not provide the corresponding interfacemethod)

3. In these cases, we can execute JavaScript code through WebDriver to achieve the purpose of manipulating (clicking or executing) elements
⑴ Execute JavaScript statements through WebDriver to interact with JavaScript in Web pages.So what JavaScript can do, Se