jquery - executeScript not populating global variable - Chrome Extension -

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i building chrome extension , have array variable array_out empty. need array populated values of array comes within executescript on callback function.

but, reason global array array_out isn't being populated, console.log shows, because chrome function running after jquery?

any help?

the code have follows:

$(document).ready(function(){     var array_out = [];      chrome.tabs.query({currentwindow: true, active: true}, function(tabs) {         chrome.tabs.executescript(tabs[0].id, {             code: " \                 var array_in = ['one', 'two', 'three']; \             "         }, function(result){             array_out = result[0];             console.log('in: ' + array_out.length);         });     });     console.log('out: ' + array_out.length); });

you using 2 functions execute asynchronously. provide callback function both chrome.tabs.query , chrome.tabs.executescript attempt access variable set in callback method of chrome.tabs.executescript.

in order ensure accessing array_out after has been initialized, must place access code (console.log('out: ' + array_out.length);) in separate function called @ end of callback function chrome.tabs.executescript (or directly in callback function itself). doing so, still execute code when $(document).ready() called, after 2 asynchronous functions have invoked callback functions array contents assigned.

for example:

 var array_out = [];  $(document).ready(function(){       chrome.tabs.query({currentwindow: true, active: true}, function(tabs) {         chrome.tabs.executescript(tabs[0].id, {             code: " \                 var array_in = ['one', 'two', 'three']; \             "         }, function(result){             array_out = result[0];             console.log('in: ' + array_out.length);             accessarray();             //you can stuff array_out here...         });     });    //console.log('out: ' + array_out.length);  //-- array_out not yet set here });  function accessarray() {      console.log('out: ' + array_out.length);       //you can more stuff array_out here... }

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