Document.readystate and Xmlhttp.onreadystatechange

Source: Internet
Author: User

Several states of Document.readystate

The 0-uninitialized:xml object is generated, but no files are loaded.
1-loading: The loader is in progress, but the file has not started parsing.
2-loaded: Some of the files have been loaded and parsed, but the object model has not yet taken effect.
3-interactive: Valid only for partially loaded files, in which case the object model is valid but read-only.
4-completed: The file has been fully loaded, representing a successful load.


onReadyStateChange belongs to XMLHttpRequest.

var New XMLHttpRequest (),     = "GET",    = ""truefunction  () {         if (Xmlhttp.readystate = = = Xmlhttprequest.done && Xmlhttp.status = = =) console.log (Xmlhttp.responsetext) ;    }; Xmlhttp.send ();

JQuery events. Load (),. Ready (),. Unload ()

Document.readystate and Xmlhttp.onreadystatechange

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