The `<body>` element

Contains all the actual content (rather than metadata) of an HTML document.

Full list of attributes

All the usual HTML global attributes are available

onafterprint: Called after a document has been printed, allowing JavaScript to undo modifications made by a beforeprint handler, or to acknowledge that a permanent copy of the document has been kept.
onbeforeprint: Called before the document is about to be printed out, allowing JavaScript code to adjust the page to be print-ready.
onbeforeunload: Called when the page is about to be unloaded, so the page can ask the user if they're sure they want to close it.
onblur: Called when the document looses focus (for example when the user switches to another tab or to a different program).
onerror: Called when an error (usually caused by JavaScript failing) bubbles up to the body element. As well as the usual event parameter, three other parameters are also provided: source, lineno, and column.
onfocus: Called when the document receives focus.
onhashchange: Called when the fragment identifier (the part after the #) of the document's URI has been changed.
onload: Called when the whole document has finished being downloaded and parsed.
onmessage: Called when the Window object associated with this document receives a message.
onoffline: Called when the browser has switched into offline mode (for example, if the network connection has been lost).
ononline: Called when the browser has switched to online mode (so a network connection is now available).
onpagehide: Called when this page is no longer the current entry in the browser's session history.
onpageshow: Called when this page has just become the current entry in the browser's session history.
onpopstate: Called when the user changes to a different page in the browser's session history.
onscroll: Called when the user vertically scrolls the window to view a different part of this web page.
onstorage: Called when the browser's localStorage facility is used.
onunload: Called when the document is being unloaded, for example when its window is being closed.

Further information

Official specification for <body> element