json - variable scope in d3 javascript -

json - variable scope in d3 javascript -

i want info in global variable using next code:

var data; d3.json ( "file.json" , function(json) { info = json; console.log(data); //defined }); console.log(data); //undefined

but problem have info variable defined in d3.json function out undefined. how can solve issue?

thanks

because d3 requests (like d3.json) asynchronous, it's best practice wrap of code dependent on external request within request callback, ensuring code has access info before executing. from d3 docs: "when loading info asynchronously, code depends on loaded info should exist within callback function."

so 1 alternative set of code within callback function. if you'd separate code parts, can pass response request separate function, this:

function myfunc(data) { console.log(data); } d3.json('file.json', function (data) { var json = data; myfunc(json); }

javascript json d3.js global-variables