How to get notified on window resize in chrome browser

Question

I am writing an extension for chrome browser where , I wanted to add event listener for the window resize event. I am getting my method executed for window load event , but not getting for resize event.

Below mention is code for my manifest.json file

{
  "name": "A browser action",
  "version": "1.0",
  "background": { "scripts": ["background.js"] },
  "permissions": [
    "tabs", "http://*/*"
  ],
  "manifest_version": 2
}

Below mention is code for my background.js file.

var myExtension = 
{  
    init: function()
    {  
      // The event can be DOMContentLoaded, pageshow, pagehide, load or   unload.           
      alert("ASHSIH");
      window.addEventListener("resize", this.onmyPageResize, false);
    },
    onmyPageResize: function(aEvent) 
    {  
      alert("RESIZED");

    }  
}


window.addEventListener("load", function load(event){  
  window.removeEventListener("load", load, false); //remove listener, no longer   needed  
  myExtension.init();    
},false); 

Answer 1

The background.js file cannot capture resize events in the browser. You would need to inject a content script for that.

Answer 2

Chrome-o-Tile is one example of an extension which listens resize in its content script.

In manifest.json:

"content_scripts": [
  {
    "js": ["contentscript.js"],
    "run_at": "document_start",
    "matches": [
      "<all_urls>"
    ]
  }
],

In contentscript.js:

'use strict';

var timeoutId = 0;

window.addEventListener('resize', function() {
  if (timeoutId) {
    clearTimeout(timeoutId);
  }
  timeoutId = setTimeout(function() {
    chrome.runtime.sendMessage({method: 'resize'});
    timeoutId = 0;
  }, 100);
}, false);

In background.js:

chrome.runtime.onMessage.addListener(function requested(request) {
  if (request.method === 'resize') {
    ...
  }
)};

There is also an open issue to implement chrome.windows.onResize event for Chrome extensions.

Answer 3

You can use jQuery's bind() function.. http://api.jquery.com/bind/

$(window).bind('resize', function () {
//do something here
});