Nested Functions - variable is not defined [duplicate]

Question

ERROR: "chromeWindow.state" is undefined here

Can you put me in the right direction?

chrome.runtime.onMessage.addListener(function(message,sender,sendResponse) 
{
  chrome.windows.get(sender.tab.windowId, function(chromeWindow) {
    // chromeWindow is DEFINED HERE
    console.log('sending to contentscript :', chromeWindow.state);
  });
  // chromeWindow.state is UNDEFINED
  sendResponse(**chromeWindow.state**);
});

It looks like the scope is not right. pluralsight.com/guides/… — Iskandar Reza
– Iskandar Reza, Commented Aug 29, 2018 at 20:28
Function parameters exist only within the scope of the function to which they are passed. You should read more about how functions in JavaScript work. — aaplmath
– aaplmath, Commented Aug 29, 2018 at 20:28

Rich Guernsey · Accepted Answer · 2018-08-29 20:30:16Z

0

chrome.runtime.onMessage.addListener(function(message,sender,sendResponse) 
{
  chrome.windows.get(sender.tab.windowId, function(chromeWindow) {
      sendResponse(chromeWindow.state);
  });
});

answered Aug 29, 2018 at 20:30

Rich Guernsey

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2 Comments

Medy Over a year ago

this is how I did it at first ... maybe there is another issue ...will add full code.

Medy Over a year ago

ok the duplicate topic pointed me in the right direction... it was a synching issue. I added : return true; developer.chrome.com/apps/messaging

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