Javascript Global Variable Value Lost -

Javascript Global Variable Value Lost -

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how homecoming response asynchronous call? 11 answers

i'm having bit of problem regarding global variables in when nail block of code:

if(done === true){ console.log(songlist); }

the values of done , songlist gone, if output them console.log after assign done=true carry expected values (songlist built in function run eval statement). can explain why is?

var song = {name:"", price:"", artist:"", image:""}; var done = false; var songlist = []; function runjson(network,searchtype){ var url = returnurl(network,searchtype,$('#song_field').val().split(' ').join("+")); $.getjson(url, function(data){ if(document.getelementbyid("box") !== "undefined"){ clearscreen(); createcols(); } eval(network + "(data);"); done = true; }); if(done === true){ console.log(songlist); } }

done = true getting assigned in callback $.getjson. run after test if(done === true).

more $.getjson here http://api.jquery.com/jquery.getjson/ - notice 'success' callback.

if did:

function runjson(network,searchtype){ var url = returnurl(network,searchtype,$('#song_field').val().split(' ').join("+")); $.getjson(url, function(data){ if(document.getelementbyid("box") !== "undefined"){ clearscreen(); createcols(); } eval(network + "(data);"); done = true; if(done === true){ console.log(songlist); } }); }

then see songlist

javascript variables global-variables