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I have a script I want to use in the Google Chrome console. But this script is going to reload the page. A bit like this :

setInterval(function(){location.reload();},3000);

The problem is, once it's reloaded, the script stops and the console is cleared. I tried the option "Preserve log on navigation" : it preserves the log, but the script doesn't restart after reloading.

How should I do ? Thanks :)

Jonathan Zimmermann
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  • Possible duplicate of [Keep the Javascript Iteration after reload in chrome console](http://stackoverflow.com/questions/16568565/keep-the-javascript-iteration-after-reload-in-chrome-console) – Sjoerd Mar 01 '17 at 10:15

3 Answers3

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There is no way to actually do that. The only possible way I found is to develop a Chrome' extension and place your script on it. Your script will be excecuted every time the target page is loaded, so when you execute the location.refresh() method , the next time the page is loaded your script will be executed all again and so on. If you wish to persist some data between page loads, then you can use localStorage.

Find more information here https://developer.chrome.com/extensions/getstarted
How to inject scripts via extensions ?: https://developer.chrome.com/extensions/content_scripts
remember that the scope of the extensions is isolated from the rest of the page, so you cant directly access JS variables or functions declared in the page itself from an extension BUT you can interact with the DOM. Good luck
Gabo Alvarez
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I am using a cool Chrome Extension called Resource Override, which allows you to inject a script on specific urls. So all you have to do is put your url (with * on each end), and create a JS file injected into the HEAD, and it will be ran every time. You start from scratch on every page though, so I'm not sure how you can persist data. Maybe in cookies?

Nico
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Try creating a parent html document that has an iframe whose source is the original html page. Place the javascript in the parent html page and tell it to reload the iframe.

Stephen Sorensen
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  • Yes, it could work but... for this exact purpose only :S And not all the sites accept iframes. I was looking for something more general. Does it mean there no way to do it in chrome ? – Jonathan Zimmermann Jun 21 '13 at 16:19
  • Yeah, I'm pretty sure you can't do it in chrome. I doubt if any of the other browsers would let you do it either. – Stephen Sorensen Jun 24 '13 at 16:10
  • Another very simliar solution by the way would be to open a new window/tab using window.open. The parent window would be able to reload the child frame the same way. – Stephen Sorensen Jun 24 '13 at 16:11