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I have a manifest.json file that looks like this:
{
"name": "Zend Debugger Extension",
"version": "0.1",
"background_page": "background.html",
"permissions": [
"cookies", "tabs", "http://*/*", "https://*/*"
],
"browser_action": {
"default_title": "Launch Zend Debugger",
"default_icon": "icon.png",
"popup": "popup.html"
}
}
Here's my background.html:
<html>
<script>
function testRequest() {
console.log("test Request received");
}
</script>
</html>
And my popup.html:
<script>
function debug(target) {
if (target.id == 'thisPage') {
console.log('sending request');
chrome.extension.getBackgroundPage().testRequest();
}
}
</script>
<div onclick="debug(this)" id="thisPage">Current Page</div>
However, the background.html page doesn't seem to be accessible. I'm getting this error:
Uncaught TypeError: Cannot call method 'testRequest' of null
When I inspect chrome.extension.getBackgroundPage() I get a null value. I'm thinking I have made a mistake in my manifest file, but I can't see what I've done wrong.
Thanks.
394
Here's another answer with more options:
chrome.extension.getBackgroundPage() returns null after awhile
According to the referenced page (Difference between Event and Background Page) there is a better option to get the background while still using Event Page :
If your extension uses, extension.getBackgroundPage, switch to runtime.getBackgroundPage instead. The newer method is asynchronous so that it can start the event page if necessary before returning it.
175
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