Chrome Extension get selected text

Question

I am looking for a way to get the selected text into my Chrome extension.

I want to ex. select a text in facebook feed and when I click my icon it will get it and show the selected text in my Extension.

I got this so far:

chrome.tabs.executeScript(null, {   code: "alert(window.getSelection().toString());" }) 

it gets the selected text and alert it with a message in Chrome. However I want to show it in my html popup. I want to write it out like this:

document.getElementById("output").value = "Selected text here(but how)" 

Need help! and I know there is other question about this, but they didn't give me exactly what I want..

Answer 1

You can use the last expression evaluated by the executed code in a callback function:

chrome.tabs.executeScript( {   code: "window.getSelection().toString();" }, function(selection) {   document.getElementById("output").value = selection[0]; });