Google Chrome extension - how to turn JavaScript on/off?
Question
Is it possible to turn JavaScript on/off with a self-made Google Chrome extension ?
For example, in Opera browser, there are simple possibilities to do that with widgets, user-made buttons , etc., but I didn't find any solutions to do that in Chrome (my first source was the official Google Chrome extensions' documentations ).
A strange aspect is that I need JavaScript to run the extension itself...if I'm able to turn JavaScript off with an extension, can I still use JavaScript in my extension after doing it?
Edit:
It's already possible to do it via chrome.contentSettings.javascript !
See this example which shows how to use it ( Quick JavaScript Switcher extension, which mlb linked here ).
5 answers
solution1
54 ACCPTED 2011-10-06 11:21:21
It's now possible with the ContentSettings API,
and there is an extension named Quick Javascript Switcher that turns on/off javascript on the fly : https://github.com/maximelebreton/quick-javascript-switcher
QJS on the Chrome Webstore : https://chrome.google.com/webstore/detail/geddoclleiomckbhadiaipdggiiccfje
Enjoy !
solution2
4 2011-02-14 07:05:13
It seems currently it is not possible for extensions to disable JavaScript support. There is even a feature request for that in the Chromium tracking site. We need to be patient and wait until Google decides to support that.
solution3
1 2011-05-20 17:08:33
Currently, we can NOT access chrome://settings/content data with your Chrome extension
In my code, when tab "chrome://settings/content" created, the alert(0) does NOT work, and always get the follow error:
Error during tabs.executeScript: Cannot access contents of url "chrome://settings/content". Extension manifest must request permission to access this host.
but when tab "http://www.google.com.hk" created, alert(0) works.
So I think we can NOT access chrome://settings/* data :
popup.html:
<html>
<head>
<script>
function openSetting() {
chrome.tabs.create({"url":"chrome://settings/content", "selected":true});
}
function openGoogle() {
chrome.tabs.create({"url":"http://www.google.com.hk", "selected":true});
}
//chrome.browserAction.onClicked.addListener(enableDisableImage);
chrome.tabs.onCreated.addListener(function(tab) {
chrome.tabs.executeScript(null, {code:"alert(0)"});
});
</script>
</head>
<body>
<input type="button" onClick="openSetting()" value="Switch"/>
<input type="button" onClick="openGoogle()" value="Switch"/>
</body>
</html>
manifest.json:
{
"name": "ImageSwitcher",
"version": "1.0",
"description": "Disable/Enable loading image",
"browser_action": {
"default_icon": "icon.png",
"default_popup": "popup.html"
},
"permissions": [
"tabs",
"*://*/*"
]
}
solution4
1 2012-02-01 20:17:52
It's now possible with the release version of chrome (as of chrome 16) to toggle java-script off and on from an extension.
Here's an extension which does just that:
https://chrome.google.com/webstore/detail/geddoclleiomckbhadiaipdggiiccfje
solution5
0 2018-06-06 16:34:20
That's the only way that worked for me to stop chrome extension from running javascript. Paste this code:
function exit() {
'use strict';
window.addEventListener('error', function (e) {e.preventDefault();e.stopPropagation();}, false);
let handlers = [
'copy', 'cut', 'paste',
'beforeunload', 'blur', 'change', 'click', 'contextmenu', 'dblclick', 'focus', 'keydown', 'keypress', 'keyup', 'mousedown', 'mousemove', 'mouseout', 'mouseover', 'mouseup', 'resize', 'scroll', 'selectstart',
'DOMNodeInserted', 'DOMNodeRemoved', 'DOMNodeRemovedFromDocument', 'DOMNodeInsertedIntoDocument', 'DOMAttrModified', 'DOMCharacterDataModified', 'DOMElementNameChanged', 'DOMAttributeNameChanged', 'DOMActivate', 'DOMFocusIn', 'DOMFocusOut', 'online', 'offline', 'input',
'abort', 'close', 'drop', 'dragstart', 'drag', 'load', 'paint', 'reset', 'select', 'submit', 'unload'
];
function eventHandler(e) {
e.stopPropagation();
// e.preventDefault(); // Stop for the form controls, etc., too?
}
for(let i=0; i < handlers.length; i++) {
window.addEventListener(handlers[i], eventHandler, true);
}
if(window.stop) {
window.stop();
}
Array.prototype.forEach.call(document.querySelectorAll("*"), el => {
if( document.defaultView.getComputedStyle(el)["-webkit-user-select"] == "none" ) {
//el.style.webkitUserSelect = "auto";
el.style.setProperty("-webkit-user-select", "auto", "important");
}
});
throw '';
}
exit();
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