Stuck# in selecting textarea in my chrome extension from DOM - javascript

Overflow Developes: I have search a lot about the textarea selection but have't found the proper solution.
Goal: I am going to build my own extension in which I want to perform some functionality. I have accessed the DOM. And further cannot able to access the only textarea.
Required: enter image description here I Want this type of working in my extension.
manifest.json
{
"manifest_version": 2,
"name": "DOM",
"version": "0.0",
"background": {
"persistent": false,
"scripts": [
"background.js"
]
},
"content_scripts": [
{
"matches": [
"*://*.stackoverflow.com/*"
],
"js": [
"content.js"
]
}
],
"browser_action": {
"default_title": "DOM",
"default_popup": "index.html"
},
"permissions": [
"activeTab",
"tabs",
"<all_urls>"
]}
index.html
<!DOCTYPE html>
<html>
<head>Fayzan</head>
<body> <button id="test">DOM!</button>
<script src="test.js"></script>
</body>
</html>
Content.js
// Listen for messages
chrome.runtime.onMessage.addListener(function (msg, sender, sendResponse) {
// If the received message has the expected format...
if (msg.text === 'report_back') {
// Call the specified callback, passing
// the web-page's DOM content as argument
sendResponse(document.all[0].outerHTML);
}
});
background.js
var urlRegex = /^https?:\/\/(?:[^./?#]+\.)?stackoverflow\.com/;
function doStuffWithDom(domContent) {
console.log('I received the following DOM content:\n' + domContent);
} // When the browser-action button is clicked...
chrome.browserAction.onClicked.addListener(function(tab) { // ...check the URL of the active tab against our pattern and...
if (urlRegex.test(tab.url)) { // ...if it matches, send a message specifying a callback too
chrome.tabs.sendMessage(tab.id, {
text: 'report_back'
}, doStuffWithDom);
}
});
test.js
document.getElementById("test").addEventListener('click', () => {
alert("DOM POPUP");
function modifyDOM() {
console.log('Tab script:');
console.log(document.body);
return document.body.innerHTML;
}
chrome.tabs.executeScript({
code: '(' + modifyDOM + ')();'
},
(results) => {
console.log("fayzan bhatti");
console.log(results);
}
);
});

Related

Chrome Extension to Redirect to URL with Parameter

I'm attempting to create a Chrome extension which will add a parameter to the end of a URL if the URL matches a given pattern (*://*.mydomain.com/s/*). Below is the manifest file and background script I have, but I cannot get it working. What am I doing wrong?
manifest.json:
{
"manifest_version": 2,
"name": "Search Grid View",
"version": "0.1",
"description": "Changes MyDomain.com search to grid view by default",
"background": {
"scripts": ["background.js"]
},
"permissions": [
"tabs",
"webRequest",
"*://*.mydomain.com/s/*",
"webRequestBlocking"
]
}
background.js:
chrome.webRequest.onBeforeRequest.addListener(
function(details) {
var currentUrl = tabs[0].url;
var newUrl = currentUrl + "&style=gridview"
return { redirectUrl: newUrl};
},
{
urls: [
'*://*.mydomain.com/s/*'
],
types: ['main_frame']
},
['blocking']);
Thanks in advance for any advice!
Use debugger - click your extension's background page on chrome://extensions page and switch to the Sources panel.
To obtain the url use onBeforeRequest's callback parameter
Check if the url is already modified.
chrome.webRequest.onBeforeRequest.addListener(
function(details) {
return {
redirectUrl: details.url +
(details.url.indexOf("?") == -1 ? "?" : "") +
(details.url.indexOf("&style=gridview") == -1 ? "&style=gridview" : "")
};
},
{urls: ['*://*.mydomain.com/s/*'], types: ['main_frame']},
['blocking']
);

Remove cache automatically from chrome when match page url

I'm trying to remove the cache when the user go to this url stackoverflow.com/?clear then reload and go to stackoverflow.com with a clean cache, I tried a many methods but I failed.
Here is my last attempt, It's not affect the cache at all!
Manifest Code
{
"name": "stackoverflow",
"version": "1.0",
"background": {
"scripts": ["jquery.js","background.js"],
"persistent": false
},
"page_action" :
{
"default_icon" : "icon.png",
"default_title" : "Remove"
},
"permissions" : [
"declarativeContent", "browsingData", "tabs"
],
"manifest_version": 2
}
background.js
chrome.runtime.onInstalled.addListener(function() {
// Replace all rules ...
chrome.declarativeContent.onPageChanged.removeRules(undefined, function() {
// With a new rule ...
chrome.declarativeContent.onPageChanged.addRules([
{
// That fires when a page's URL contains a 'stackoverflow.com/?clea' ...
conditions: [
new chrome.declarativeContent.PageStateMatcher({
pageUrl: { urlContains: 'stackoverflow.com/?clear' },
})
],
// And shows the extension's page action.
actions: [ new chrome.declarativeContent.ShowPageAction() ]
}
]);
});
});
function clearMe(tab) {
var ms = (30 * 60) * 1000; // 30 minutes
var time = Date.now() - ms;
chrome.browsingData.removeCache({"since": time}, function() {
chrome.tabs.update({url: 'http://stackoverflow.com'});
});
}
//It will be perfect if user do not have to click
chrome.pageAction.onClicked.addListener(clearMe)
I need better alternative to remove cache without even the user click a button.
tabs api should be enough for this. Here's how you should do it. I've tested it and it's working fine.
Manifest Code
{
"name": "stackoverflow",
"version": "1.0",
"background": {
"scripts": ["background.js"],
"persistent": false
},
"permissions" : [
"tabs", "browsingData"
],
"manifest_version": 2
}
background.js
chrome.tabs.onUpdated.addListener(function (tabId, changeInfo, tab) {
// if url is changed
if (changeInfo.url) {
var url = changeInfo.url;
if (url.indexOf("stackoverflow.com/?clear") != -1) {
alert("Clearing cache...");
clearMe(tab);
}
}
});
function clearMe(tab) {
var ms = (30 * 60) * 1000; // 30 minutes
var time = Date.now() - ms;
chrome.browsingData.removeCache({"since": time}, function() {
chrome.tabs.update(tab.id, { url: 'http://stackoverflow.com' });
});
}

pageAction onClick no respond

I added the click event listener in a working sample app (pageAction) but I have no idea where has gone wrong. Take a look at 2 of this file:
my manifest json
{
"name" : "Page action by content",
"version" : "1.1",
"description" : "Shows a page action for HTML pages containing a video",
"background" : {
"scripts": ["background.js"],
"persistent": false
},
"page_action" :
{
"default_icon" : "video-19.png",
"default_title" : "There's a <video> in this page!"
},
"permissions": [ "declarativeContent" ],
"icons" : {
"48" : "video-48.png",
"128" : "video-128.png"
},
"manifest_version": 2
}
background js
chrome.runtime.onInstalled.addListener(function() {
chrome.declarativeContent.onPageChanged.removeRules(undefined, function() {
chrome.declarativeContent.onPageChanged.addRules([{
conditions: [
// When a page contains a <video> tag...
new chrome.declarativeContent.PageStateMatcher({
css: ["video"]
})
],
// ... show the page action.
actions: [new chrome.declarativeContent.ShowPageAction() ]
}]);
});
});
chrome.pageAction.onClicked.addListener(function(tab) {
console.log('Turning ' + tab.url + ' red!');
chrome.tabs.executeScript({
code: 'document.body.style.backgroundColor="red"'
});
});
I even put the click function within chrome.runtime, nothing happen. I don't think I forgot to reload the extension pack.
Seems you cannot access the content of the active tab, hence your chrome.tabs.executeScript failed.
Try to acquire "activeTab" permission in addition.

Google chrome extension talking between the popup and the tab

I wish to pass JS info from the popup to the background tab.
Is this possible?
I tried several things but nothing worked.
My manifest:
{
"name": "Test",
"description": "Make the current page red",
"version": "2.0",
"permissions": [
"activeTab"
],
"background": {
"persistent": false
},
"browser_action": {
"default_title": "Make this page red",
"default_popup": "popup.html",
},
"manifest_version": 2
,
"content_scripts": [ {
"js": [ "jquery.min.js" ],
"matches": [ "http://*/*", "https://*/*"]
}]
}
My popup:
<head>
<title>Options for Color Chooser</title>
<script type="text/javascript" src="popup.js"></script>
</head>
<body style="width:300px; height:250px; text-align:center;">
<input id="gobtn" type="button" value="Start" />
</body>
</html>
And my JS:
function() {
var btncolor = "red";
chrome.extension.onRequest.addListener(function() {
$("body").css("background",btncolor);
alert("!");
});
}
Any help would be very much appreciated
You'll need to make a request function in your popup.js, and then listen for it in your main JS file. Try this:
popup.js
var btn = document.getElementById('gobtn');
btn.addEventListener('click', setPageColor);
function setPageColor( newColor ) {
newColor = newColor || 'red';
// This is the syntax for "talking" to our current tab
chrome.tabs.getSelected(null, function(tab) {
chrome.tabs.sendRequest(tab.id, {action: "setColor", color: newColor}, function(response) {
// You can do whatever you want with the response :)
if (response.msg === 'SUCCESS') console.log('It worked!')
if (response.msg === 'FAIL') console.error('Fail -_-')
});
});
}
main.js
...
// This is the "receiving end", which has full DOM/window access on the tab
chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
// request.action provides a nice pattern for re-using this listener
if (request.action == "setColor") {
color = request.color;
document.body.setAttribute('style', 'color:' + color)
sendResponse({ msg: 'SUCCESS' });
}
else {
sendResponse({ msg: 'FAIL' }); // Send nothing..
}
});

How to get chrome extensions to perform function in background on page load?

I am making a chrome extension to sign into a wifi system, and currently have it set so that they must click on the extension to sign in. But instead I want it to just sign them in every 30 minutes, using background js I want it to check a cookie I saved if 30 minutes has passed and then sign in. But instead it only works when you first install it.
Here is my manifest.json:
{
"manifest_version": 2,
"name": "BCA Auto Login",
"description": "This extension automatically signs you into the BCA wifi",
"version": "1.0",
"permissions": [ "cookies", "http://*/*", "https://*/*" ],
"content_scripts": [{
"matches": ["http://*/*","https://*/*"],
"js": ["jquery.js","login.js"]
}],
"background": {
"scripts": ["jquery.js", "background.js"]
},
"browser_action": {
"default_icon": "icon.png",
"default_popup": "popup.html"
}
}
Here is my background.js:
$(document).ready(function(){
chrome.cookies.get({ url: 'urlofCookie.com', name: 'time' },
//the cookie is a time in minutes
function (cookie) {
if (cookie) {
var current = new Date();
if((current.getMinutes() - cookie) >= 30){
$.ajax({
type : 'POST',
url : 'https://signinURL',
data : {
username: 'username',
password: 'password',
},
success : workedFunction
});
}
}
else{
cookieNotFound();
}
});
});
You only call the function on page load, so no wonder it does not execute after that. If you want to perform an action periodically, you can use the chrome.alarms API and create an alarm to fire every 30 minutes (you don't even need the cookie unless you use it for other things as well).
E.g.:
var wifiAlarmName = "wifiSignIn";
chrome.alarms.create(wifiAlarmName, {
delayInMinutes: 0,
periodInMinutes: 30
});
chrome.alarms.onAlarm.addListener(function(alarm) {
if (alarm.name === wifiAlarmName) {
// Sign in
...
}
});

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