extension ExtPose

Custom JavaScript for websites

Description from extension meta

Run custom JavaScript on any website.

Image from store Custom JavaScript for websites
Description from store Use this tool to inject custom javascript in any website. Your scripts are kept in the local storage and applied across domain URLs. You can use jQuery 1.11.0 or 2.1.0 or your own external scripts Usage: - site debugging (wrong list sort, etc.) - hiding annoyng popups and Ads - anything you can think of :) New features: - Ace Editor (formating, highlight, undo/redo by hotkeys) - Draft auto save (so doesn't matter when you close the window without saving) - Hosts (websites) switch (you can browse customjs of other websites) - Include external script (eq. Underscore.js is cool) - Launch script on the page embedded by iframe Change log: - 2.1.3 - Fixed Cyrillic problem in source - 2.1.40 - Fixed a problem with the installation Thanks to: Ace - http://ace.c9.io/ Pure - http://purecss.io/

Latest reviews

  • (2020-04-14) fires3as0n: I put 20 lines of code, page reloads, I open editor, there is only first line of code there
  • (2020-04-01) Anbarasan: I love it
  • (2020-03-30) 박한얼: I will share my script. This is for youtube and when video is clicked, that will be opened in another specific tab. This will be useful when watching video with second screen and searching with the other. If anyone who can make it better, please let me know... $(document).on("click", "a", function(e){ let href = $(this).attr("href") if (href.startsWith("/watch?v=")) { window.open("https://www.youtube.com" + href, "youtube") setTimeout(function(){ window.history.back() }, 500) } })
  • (2020-03-23) Jeremy Wu: hmmm, It would be better if you support controlling script position in HTML https://developer.chrome.com/extensions/content_scripts#run_time
  • (2020-01-15) Andrew A 7698: Not work, but in console my script work
  • (2019-10-15) Alex P: Doesn't work. Waist of time.
  • (2019-10-14) Paul Vasile: Doesn't work
  • (2019-10-08) Vasyl Butov: Does exactly what it supposed to, BUT if you clear site data, extension's data clears as well. I'd like ether an option to keep script even after clearing site data or some preset templates to quickly apply changes. P.S.: absolutely love this extension, but 2 starts just for devs to notice this.
  • (2019-09-27) Motaz Ibrahim: There is no explanation on how to open the editor and use it I click on it and then nothing
  • (2019-09-08) Adrian Boisclair: This is a great extension. Seems to have a few minor issues, ie sometimes the javascript doesn't load into the editor (the dropdown text-box containing the JS) but other than that it works nicely. I'm curious though.. One thing that strikes me as a little bit intrusive on an individuals privacy is that your extension is able to read all of our browsing history. Is this 100% necessary? If you had an anonymous version of it I bet it would be huge in popularity.
  • (2019-09-07) Adam Yeh: This is perfect app and i love it so much!
  • (2019-09-06) K F: Za każdym razem czasu usuwa napisane skrypty.[PL] Every time deletes prepared scripts .[ENG]
  • (2019-08-15) Jake Crump: hey google. Delete all other js-injection plugins because this one works and the others are trash. kthxb
  • (2019-08-11) Will Ashley: Has a pretty egregious bug. When you paste in your JS to the text area, hit save, reload the page, then click the extension again, only the first line of the pasted code is prefilled in the editor, but it seems like the extension does indeed save the state because the snippet still runs. Seems like a very strange bug. It should always show the full snippet upon reload each time, otherwise it is not worth the time as tweaking your snippet as your needs change will be untenable.
  • (2019-07-16) Evan Matariel: Funciona de maravilla
  • (2019-07-11) xj x: only one line of source loaded
  • (2019-07-03) M i r a c H: Works perfect, dont forget to block your .js file on console!
  • (2019-04-03) Sergey Nagorets: Works perfectly, but having possibility to sync would be great!
  • (2019-03-30) Jean Marc: It works but I can't see the code after few days, only the first line of the code is visible, don't want to write everything all over again.
  • (2019-02-13) Ethan M: No more clicking the same button across 30 tabs. I just find the button (via XPath -- see below), and let this wonderful CJS extension rip! var x = document.evaluate('//path/to/some/button', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE); x.snapshotItem(0).click(); I am - however -- having better luck with this apparently cloned version of CJS: https://chrome.google.com/webstore/detail/custom-javascript-for-web/ddbjnfjiigjmcpcpkmhogomapikjbjdk/related?hl=en.
  • (2019-01-30) David Brewitz: Been using it for a couple years and it does what it says.Works great for adding your custom js.
  • (2019-01-10) Jukka Hautakorpi: Scripts dissapear every other month or so without a trace. Not so good.
  • (2018-12-09) Michael Ivanov: Exactly what I was looking for.
  • (2018-11-27) Erik Brickarp: Performs exactly what it says and performs it well!
  • (2018-10-23) Joseph Salerno: Simple, to the point and no annoying extra feature or limitation. Just perfect.

Latest issues

  • (2020-05-04, v:2.2.5) Modestas Kižauskas: JS snippet should be inserted before LAST instance of </body > tag
    It seems that the JS snippet (<script src="data:text/javascript;base64,...">) is inserted before first </body> tag. Not sure if this an intended functionality or a bug. I have a case of body inside a body (example below), and my custom script is inserted into the body within iframe. My guess it happens because it is the first </body> tag occurrence? If this is a bug - is it possible to expect a fix for it? <html> <body> <iframe> <html> <body> </body> </html> </iframe> </body> </html>
  • (2020-02-16, v:2.2.5) David Martín: Lost code
    After writing some code for a URL, maybe one or two days later it disappears and I lose it. It has happened to me several times. Is there any way to get it back?
  • (2020-02-15, v:2.2.5) Mattshu: forgets code unless reopen window
    same issue as people are having where code is disappearing but a resolution is to close the cjs window and reopen it and clicking the 'remove draft' next to the reset button
  • (2019-11-15, v:2.2.5) Jukka Hautakorpi: This addon just keeps forgetting the scripts, over and over agan
    Not trustworthy, you have to write your scripts again and again
  • (2019-10-22, v:2.2.5) Derek Lam: cannot save, mac, chrome
    cannot save, mac, chrome
  • (2019-10-13, v:2.2.5) Bob Findlay: all bar line 1 disappears
    although the code is there, all but line 1 is not visible. this has been commented on and has been like this for over 6 months. any chance of a fix?
  • (2019-08-30, v:2.2.4) Andrej Kovacik: Can scripts be synced with all my browsers?
    When chrome syncs my extensions it doesn't include the actual scripts. It would work better if everything including (entered) scripts would sync with the extension.
  • (2019-06-03, v:2.2.4) Tom Koksa: :(
    U Youtube to nefunguje :(
  • (2019-03-07, v:2.2.4) Francesco: Putting CSS switches back Javascript
    Selecting CSS from top select, inputting some CSS rules but when I open cjs again it shows as Javascript and marks the lines with errors (red square with an x).
  • (2019-02-27, v:2.2.4) Max _: Uncaught DOMException: Failed to read the 'localStorage' property from 'Window': The document is sandboxed and lacks the 'allow-same-origin' flag.
    Uncaught DOMException: Failed to read the 'localStorage' property from 'Window': The document is sandboxed and lacks the 'allow-same-origin' flag.
  • (2019-02-26, v:2.2.4) Ernesto Borio: Can you trigger a JS snippet with a keyboard shortcut?
  • (2019-01-25, v:2.2.4) Juro Oravec: A marketplace for scripts that are run (and shared) on the same domain by other people.
    I use CJS mostly for removing annoying elements of the websites (banners or buggy unremovable UI components), resetting cookies after hitting limits, etc. Because of this, it would be great of people could share/load up scripts submitted by other people. That way, I don't have to write the script myself every time, if there was also somebody else who already took care of the annoying components of a website.
  • (2018-12-30, v:2.2.4) Rok Pušnik: flexibility
    it might be a good idea to let users use wildcards and specify in more detail where they want a script to run (ie for something to run ONLY on "*.google.*/category/else")


59,119 history
4.3546 (361 votes)
Last update / version
2019-10-13 / 2.2.5
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