Example: javascript registration event handler _ javascript skills

This article describes how to register the event processing function in javascript using examples. the content is comprehensive. if you are interested, refer to the event as the core content of javascript, its importance is not described here. After an event is triggered, an event processing function is required. for example, we can define to set the background of a p to Green after clicking a button. let's take a look at how to achieve this effect, the code example is as follows:

  
  How does javascript register event processing functions?