jquery - Chrome Extension Content Script to access chrome.storage -

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i've created custom menu appended page using chrome extensions content script. extension works great , menu appear wanted.

i want go little further , add options page on/off switch define var menutoggle either 1 or 0, , var attached if condition: 

if menutoggle == 1 //  else // console.log("var 0, menu not loaded");

i able make work on extension environment using "localstorage.menutoggle = 1;", understand work instance inside extension , content script not able access var.

i went through official docs chrome.storage api honestly, didn't understand since i'm on stage of programming.

from saw should use chrome.storage.sync.set this, didn't quite how set , either how retrieve data once inside content script. tried bellow, didn't work :

chrome.storage.sync.set({'menutoggle': '1'}, function(){});

question here: need define function after sync.set? possible store data without function after it?

bellow code used localstorage:

var varmenutoggledefault = 1; localstorage.varmenutoggle = 1;  $("input:checkbox[name=onoffswitch]").change(function() {   if ($(this).is(':checked')) {     localstorage.varmenutoggle = varmenutoggledefault;     console.log('switch on');     console.log("var is: " + localstorage.varmenutoggle);   } else {     localstorage.varmenutoggle = "0";     console.log('switch off');     console.log("var is: " + localstorage.varmenutoggle);   }  if (localstorage.varmenutoggle == 1) {  // load menu } else {  // console.log("varmenutoggle 0. menu not loaded"); };

what i'm doing wrong/missing?

chrome.storage functions asynchronous. function after brackets called callback function, , fires when operation complete. don't have have callback function.

getting data bit different. can access data way:

chrome.storage.sync.get("menutoggle", function(data) {     var menutoggle = data.menutoggle; }

because functions asynchronous, if want data back, must have callback function. callback function receives object has menutoggle property, contains value set.


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