XMLHttpRequest has 5 readyStates, and I only use 1 of them (the last one, 4).
What are the others for, and what practical applications can I use them in?
XMLHttpRequest has 5 readyState s, and I only use 1 of them (the last
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XMLHttpRequest has 5 readyStates, and I only use 1 of them (the last one, 4).
What are the others for, and what practical applications can I use them in?
The full list of
readyStatevalues is:(from https://www.w3schools.com/js/js_ajax_http_response.asp)
In practice you almost never use any of them except for 4.
Some XMLHttpRequest implementations may let you see partially received responses in
responseTextwhenreadyState==3, but this isn’t universally supported and shouldn’t be relied upon.