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Search through files in path using only javascript

I'm coding a webpage that needs to read some data from different csv on a path depending on the country of the user.
the path is something like this:
./csv/m2-2022-10-25_13_45_55_es.csv
m2-2022-10-25_13_45_56_fr.csv
m2-2022-10-25_13_46_04_it.csv
etc
And those files will be replaced regularly, the only that we'll always have is the country code (es, fr, it, etc).
So, what I need is to list all the files on the path to an array, and loop through the array to find if the last characters of the filename are $countryCode + ".csv", and there run some code.
But I can't find how, all the solutions I find are using Node.js, but are there a solution using only Javascript (or jQuery)?
Regards!

You cannot use pure Javascript to do that, because if you wanted to search files in your computer only using javascript, it would be a huge security breach.
You must use node.js to open files but you can make an API to your nodejs file from your javascript and you can send as a response the content of your file.
Here some links that might help you :
FS : https://nodejs.org/api/fs.html
NodeJS api : https://medium.com/swlh/how-to-create-a-simple-restful-api-in-node-js-ae4bfddea158

You can check a similar question here:
Get list of filenames in folder with Javascript
You can't access to filesystem from the frontend, this it would be a huge security breach, because anyone could access to your filesystem tree.
You have to do a function in backend to build the array you want and send it to frontend.
If you create a function in backend file that returns the array of files in the folder, you can call it from the frontend via XMLHttpRequest or Fetch to get the array in frontend and be able to use in your js file.

access a certain line from a file and change it using javascript

I have a XML File and I need to access that file in Javascript.
I need to get a certain line and change it.Here is an example:
changeFileCode("data.xml", 12, "New Data");
// The first paramater is for the file we want.
// The second paramater is the line we want.
// The third paramater is the new content we want written
Is there a way to do it?
P.S.: I don't want a piece of code that has 1000 lines.

You should not rely on Line/Columns numbers in XML. because XML neglect white-spaces.
But you can target a specific node and change its value using JQuery.
Let's say you want to do that from a client-side, because that's what javascript do, you will have to get that XML file from the server, in purpose to edit the particular parts then send it back to the server to save it; for example:
$.get("yourGetUrl.php", function(data) {
var xml = $(data);
xml.find("yourNode").text("yourNewData");
$.post("yourPostUrl.php", xml, function(resp) {
alert(resp);
}, "xml");
});

Javascript cannot directly access the local file system. The safe way to do this would be to get the user to provide the file via an
<input type="file"/>
element.
You can then manipulate the file using the File Api
The user will then need to re-save the altered file.
The other way to achieve this would be to write a server side api using whatever technology you fancy (php/asp etc) to manipulate files based on parameters and then call it using ajax from your web page.

Need help about accessing a JSON file using JavaScript without the use of any servers

I'm just beginning with JavaScript and I was wondering if I can access a JSON file on the localhost without the use of any servers (like WAMP). I was planning to just read the contents of a JSON file and reflect its contents to an HTML file.

Short answer, yes you can.
Make an XMLHttpRequest against a static file such as: resources/myJSON.json (the extension is merely for organization, you can call the file whatever you want really).
Parse the response as JSON.
Obviously the file must contain a properly formatted JSON object of data, but as long as that's the case, you can load static JSON from a file to "simulate" remote connectivity to a server.
When you're browsing a file as: file:// on your system, it should treat the relative paths correctly.

Reading local XML file with javascript

I am new to HTML/Javascript, as well as coding in general so bear with me :). I am trying to create a "Spot the Difference" game in html5 using javascript. Everything is local (on my machine). I have two pictures, of the same size, one with differences. To generate data about the clickable fields, I have a java program that reads both of the images and outputs all of the positions in which pixels are different into a XML file. My plan was to then use this XML file with my javascript to define where the user could click. However, it appears (correct me if I'm wrong) that javascript cannot read local XML files for security reasons. I do not want to use an ActiveXObject because I plan on putting this onto mobile devices via phone gap or a webkit object. Does anyone have a better approach to this problem, or perhaps a way to read local XML files via javascript? Any help would be greatly appreciated, thanks.

If you are planning to put this into a smart phones (iOS and Android) and read local files, I have done similar things with JSON (yes, please don't use XML).
Convert your output to JSON
Put this as part of your application package. For example, in Android, I put it as part of the .apk in /appFiles/json
Create a custom content provider that would read the local file. I create mine as content:// but you create whatever scheme you want. You could leverage android.content.ContentProvider in order to achieve custom URL Scheme. iOS has its own way to create custom scheme as well. The implementation simply read your local storage and give the content
To read it from Javascript, I simply call ajax with the custom scheme to get the json file. For example content://myfile/theFile.json simply redirect me to particular directory in local storage with /myfile/theFile.json appended to it
Below is the sample to override openFile() in the ContentProvider
public ParcelFileDescriptor openFile (Uri uri, String mode) {
try {
Context c = getContext();
File cacheDir = c.getCacheDir();
String uriString = uri.toString();
String htmlFile = uriString.replaceAll(CUSTOM_CONTENT_URI, "");
// Translate the uri into pointer in the cache
File htmlResource = new File(cacheDir.toString() + File.separator + htmlFile);
File parentDir = htmlResource.getParentFile();
if(!parentDir.exists()) {
parentDir.mkdirs();
}
// get the file from one of the resources within the local storage
InputStream in = WebViewContentProvider.class.getResourceAsStream(htmlFile);
// copy the local storage to a cache file
copy(in, new FileOutputStream(htmlResource));
return ParcelFileDescriptor.open(htmlResource, ParcelFileDescriptor.MODE_READ_WRITE);
} catch(Exception e) {
throw new RuntimeException(e);
}
}
I hope it helps

I would suggest modifying your java program to output a JSON formatted file instead of XML. JSON is native to JavaScript and will be much simpler for you to load.
As for actually loading the data, i'm not sure what the best option is as you say you want to evenutally run this on a mobile device. If you were just making a normal website you could setup a web server using either Apache or IIS depending on your OS and put the files in the document root. Once you've done that you can load the JSON file via Ajax, which can easily be googled for.
Not sure if this helps any.

Since this is a local file, you can do this with jQuery
$.ajax({
type: "GET",
url: "your.xml",
dataType: "xml",
success: function(xml){
///do your thing
}
});
http://api.jquery.com/jQuery.ajax/

How to read contents of a file using javascript?

I have an input type="file" button. After I choose a file, I have to read the contents of the file using javascript. Is it possible to read/get contents of a chosen file using javascript or ajax?

You are all wrong in a way. It is possible. With the new File API you can read files before submitting them to the server. It is not available in all browsers yet though.
Check this example. Try to open a text file for example.
http://development.zeta-two.com/stable/file-api/file.html
Edit: Even though the question states "uploaded file" I interpret it as, "a file to be uploaded". Otherwise it doesn't make sense at all.

With AJAX its possible to read uploaded file but with pure javascript its not possible because javascript works on client side not on sever side.
if you are going to use jquery than Ajax call may be like this
$.ajax({
url: "test.html",
context: document.body,
success: function(){
$(this).addClass("done");
}
});

Reading files client side is hard:
How to read and write into file using JavaScript
Read a local file
Local file access with javascript
Unless you are trying to do it with local javascript:
Access Local Files with Local Javascript
Or server side javascript:
http://en.wikipedia.org/wiki/Server-side_JavaScript
Alternatively you can force your user to install an ActiveX object:
http://4umi.com/web/javascript/fileread.php

you cant do it using javascript directly. You can post the file to the server an then use ajax to retrieve the content.

Javascript is designed not to have access to the computer it is running on. This is so that rogue javascript can't read the user's harddrive.
You could look into using iframes though.

It is not possible to do it in java script. See Local file access with javascript
I agree with DoXicK above. You can post the file first on server and then you can use Ajax to read it.

That is not entirely impossible
A browser's usually runs Javascript(JavaScript Engine) in a sandboxed environment.
So you can use Windows Scripting Host or Internet Explorer in a trusted environment and use the FileSystemObject
or use
Or upload a file to your server and use the XMLHttpRequest object.(in other words - Ajax)

For IE use the FileSystemObject (which is found on all Windows systems).
For Firefox:
var file = Components.classes["#mozilla.org/file/local;1"].
createInstance(Components.interfaces.nsILocalFile);
file.initWithPath("/home");
See https://developer.mozilla.org/en/Code_snippets/File_I%2F%2FO
To see these methods and others in use, look at TiddlyWiki app to see how it does it across all major browsers.