{"json_modified": "2015-07-10T01:20:12.108424", "slug": "Web/Guide/Events/Overview_of_Events_and_Handlers", "tags": [], "locale": "zh-CN", "title": "Overview of Events and Handlers", "translations": [{"title": "Overview of Events and Handlers", "url": "/en-US/docs/Web/Guide/Events/Overview_of_Events_and_Handlers", "tags": ["NeedsUpdate", "Beginner", "NeedsBeginnerUpdate"], "summary": "Events and event handling provide a core technique in Javascript for reactivity to incidents which occur during the time a web page is kept open by a user, including incidents which occur while a page is being prepared for display, incidents due to user interaction with the content of the web page, incidents related to the device on which the browser is running, or incidents due to many other causes such as media stream playback or animation timing.", "localization_tags": [], "locale": "en-US", "last_edit": "2014-08-16T13:18:54", "review_tags": []}], "modified": "2015-07-10T01:20:11", "label": "Overview of Events and Handlers", "localization_tags": ["inprogress"], "url": "/zh-CN/docs/Web/Guide/Events/Overview_of_Events_and_Handlers", "last_edit": "2015-07-10T01:20:09", "summary": "Events and event handling provide a core technique in Javascript for reactivity to incidents which occur during the time a web page is kept open by a user, including incidents which occur while a page is being prepared for display, incidents due to user interaction with the content of the web page, incidents related to the device on which the browser is running, or incidents due to many other causes such as media stream playback or animation timing.", "sections": [{"id": "The_event_design_pattern", "title": "The event design pattern"}, {"id": "Button_Event_Handler", "title": "Button Event Handler Demo"}, {"id": "Notable_events", "title": "Notable events"}, {"id": "The_Event_object_hierarchy", "title": "The Event object hierarchy"}, {"id": "Documents", "title": "Documents"}], "id": 156695, "review_tags": []}