Is there a way to detect Google Chrome's version from the console.
I know I can parse the user agent string - but I prefer a more concise way.
Here is what I currently have:
var uaStr = navigator.userAgent.toLowerCase();
var index = uaStr.indexOf('chrome/');
uaStr.substring(index +7,index+11);
I would like to know if there's a better way - something like chrome.version()
Thanks.
In Chrome DevTools Console execute the following statement:
> navigator.appVersion.match(/.*Chrome\/([0-9\.]+)/)[1]
And you will get the version number as a string
> "51.0.2704.103"
Related
Is there a way to get the loaded extensions?
For example, can I get the measurement extension by doing something like:
let m = viewer.Measurement
And then invoking the measurement methods like enabling and disabling it?
I found it, it's with:
let MeasureExtension = viewer.getExtension("Autodesk.Measure");
And to view all the extension you can use viewer.loadedExtensions.
I am new to chrome extensions.I used chrome.runtime.onInstalled to load a html page whenever the extension is installed or updated.But when i am testing it in chrome, whenever i check/uncheck Allow in incognito the same html page loads each time.How to avoid this behaviour? I used "incognito":"split" in manifest.
I wish you'd posted the code so I could try to replicate the problem and give a specific solution but the easy solution is to use chrome storage API to save the extension's version when welcome.html is opened and compare it to the current version next time onInstalled is fired.
If the stored version is the same don't open it. If it's undefined or older, open it.
Get your extension's version by extracting it from chrome.extension.getURL("manifest.json")
Edit:
After a bit of googling it seems you can access the manifest more directly. Get the version number using the code below.
var version = chrome.runtime.getManifest().version;
Edit:
It seems the previous version is supplied in the callback when you update so you don't need to store anything. The object provided can be compared to the current version using chrome.runtime.getManifest().version
Something like this:
chrome.runtime.onInstalled.addListener(function (details) {
if(details.reason === "install"){
chrome.tabs.create({url: "welcome.html"});
}
else if(details.reason === "update"){
var currentVersion = chrome.runtime.getManifest().version;
var previousVersion = details.previousVersion;
if(previousVersion !== currentVersion){
chrome.tabs.create({url: "welcome.html"});
}
}
});
I don't think you can. I assume that when you uncheck "Allow in incognito", Chrome nukes the local state of the (split) incognito instance.
When executing a script directly in the console in Chrome, I saw this:
Does anyone know what's the meaning of VM117:2
What does VM stand for ?
It is abbreviation of the phrase Virtual Machine.
In the Chrome JavaScript engine (called V8) each script has its own script ID.
Sometimes V8 has no information about the file name of a script, for example in the case of an eval. So devtools uses the text "VM" concatenated with the script ID as a title for these scripts.
Some sites may fetch many pieces of JavaScript code via XHR and eval it. If a developer wants to see the actual script name for these scripts she can use sourceURL. DevTools parses and uses it for titles, mapping etc.
Thanks to #MRB,
I revisited this problem, and found the solution today,
thanks to https://stackoverflow.com/a/63221101/1818089
queueMicrotask (console.log.bind (console, "Look! No source file info..."));
It will group similar elements, so make sure you add a unique identifier to each log line to be able to see all data.
Demonstrated in the following example.
Instead of
data = ["Apple","Mango","Grapes"];
for(i=0;i<10;i++){
queueMicrotask (console.log.bind (console, " info..."+i));
}
use
data = ["Apple","Mango","Grapes"];
for(i=0;i<data.length;i++){
queueMicrotask (console.log.bind (console, " info..."+i));
}
A better way would be to make a console.print function that does so and call it instead of console.log as pointed out in https://stackoverflow.com/a/64444083/1818089
// console.print: console.log without filename/line number
console.print = function (...args) {
queueMicrotask (console.log.bind (console, ...args));
}
Beware of the grouping problem mentioned above.
I have a form and I need to put the data of that form in collection, using coffeescript
I am currently doing these in my client coffeescript file:
#Question = new Meteor.Collection('questions')
Template.question.events
'submit #question-form' : (event) ->
QuestionData = $('#question-form').serializeJSON()
Question. insert QuestionData
I am not sure whether these data is being inserted or not. Please give me some useful ideas
Thank You in advance !!!
Tools you can use:
1) You can add a line to javascript:
debugger
your client browser will stop when it reaches that line. Sometimes you have to be in an inspect element screen already before it triggers. I do this often in Chrome and Firefox. Firefox has a debugger tab; chrome, a sources tab.
2) You can use mini-mongo in the client to check for the new record. In the console (you can get to the console as a tab as described above) type
Question.find().fetch()
You can also write
id = Question.insert QuestionData
console.log 'Question.findOne("' + id + '")
which should give an easy to copy and paste.
In a separate terminal/dos prompt fire up the mongo console using.
meteor mongo
then to list all the questions in the mongo console type
db.questions.find().pretty()
I was trying to get the version of my extension at run-time using chrome.app.getDetails().version and noticed that chrome.app.getDetails() returns null. Surprisingly, there is no talk about this in the online community and the function isn't even documented by the Google folks. Is there a permission I am missing? I do have tabs enabled.
Very old... I know
But in case if someone is looking for this, you can have your extension version reading the manifest file with chrome.runtime API and the getManifest Method.
Ex. in your background script:
var manifest = chrome.runtime.getManifest();
var current_version = manifest.version;
console.info('Current Version: ', current_version);
The object returned is a serialization of the full manifest file, so you can get all the info in the manifest file
So.. if you want for example all and only the matches of your content_scripts... for say something...
for(var i in manifest.content_scripts) {
console.log(manifest.content_scripts[i]['matches']));
}
Note: Stable since Chrome 22
It's undocumented because they might be moving getDetails to a different part of the API -- see this bug. It's currently working on my copy of Chrome (beta channel), but I wouldn't be surprised if they've disabled it in a newer release. In the meantime you can just do an AJAX query to get the manifest.json of your extension -- you can get its URI using chrome.extension.getURL("manifest.json").
Here is what I'm using to pull the current version.
var manifest = new XMLHttpRequest();
manifest.open("get", "/manifest.json", true);
manifest.onreadystatechange = function (e) { if (manifest.readyState == 4) {console.log(JSON.parse(manifest.responseText).version)} };
manifest.send({});