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Making a local file hold a value to use by any user

I am trying to make a webpage that will be able to store a variable, using JavaScript, called heart-count (I was trying it with jQuery and JSON, but didn’t have any luck, I could access the number easily, but I couldn’t change it).
This variable should be easily accessed by the JavaScript and be able to be changed (or in my case incremented).
The way that I have it right now is in a local file called heart.json inside this file is the following code:
{
"hearts": 0,
"heartLog": []
}
I am accessing that file in my JavaScript like this:
$.getJSON("../js/heart.json", function(data) {
$("#num-hearts").text(data.hearts)
})
I was trying to use XMLHttpRequest (a way that was suggested to me):
var myJSON
$.getJSON("../js/heart.json", function(data) {
myJSON = data
setTimeout(() => {
myJSON.hearts++
console.log(myJSON)
console.log(data)
}, 2000);
})
var xhr = new XMLHttpRequest()
xhr.open("PUT","../js/heart.json",true)
xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8')
xhr.send(JSON.stringify(myJSON))
I can’t confirm that this doesn’t work, since the way that the webpage is set up I test it using some interesting methods (interesting, but required…), and those use localhost. The reason I say that I can’t confirm that it doesn’t work, is because when I test the previous code, it says that “PUT” isn’t a valid protocol.
If there are any suggestions or validations of my code, that would help a lot.

How ya doin? I'm sorry to say but you can not write to a file in server directly with jQuery or Javascript because Javascript is frontend language. It doesn't have the capability to do so.
However you can send or receive data with XMLHttpRequest, but you need a server side language/program to process your XMLHttpRequest.

Read list from a text file js

Hello i'm trying to read this list from a file
this
this.testJson = {
list:[
{src:"x1.jpg",title:"x1",song:"x1.mp3"},
{src:"x2.jpg",title:"x2",song:"x2.mp3"},
{src:"x3.jpg",title:"x3",song:"x3.mp3"},
{src:"x4.jpg",title:"x4",song:"x4.mp3"}
]
}
to
this.testJson = {
list:[
// read x.txt or x.txt from a URL
]
}
and x.txt contain
{src:"x1.jpg",title:"x1",song:"x1.mp3"},
{src:"x2.jpg",title:"x2",song:"x2.mp3"},
{src:"x3.jpg",title:"x3",song:"x3.mp3"},
{src:"x4.jpg",title:"x4",song:"x4.mp3"}
as i do not have any java script experience , can somebody help me with this ?
thanks in advance

You have to expose that file from a web-server so your JavaScript can make an http request on that file.
To load resources from JavaScript you have to make an XMLHttpRequest or better known as AJAX request.
Actually this requires some setup so using a library would be easier. My favourite one is axios. It has a really simple API and handles response parse as well, so when you load axios on your web-site this is an approach you might follow :
axios.get('path-to-file').then(function(response){
this.testJson.list = response.data
});
Note that your x.txt does not seem like a valid JSON. It has to be a valid one so axios can parse it. If you decide to parse the file on your own you have to use JSON API.

node.js does not recognise the url in the unfluff module

Any help will be appreciated.
I need to extract data from websites and found that node-unfluff does the job (see https://github.com/ageitgey/node-unfluff). There is two ways to call this module.
First, from command line which works!
Second, from node js which doesn't work.
extractor = require('unfluff');
data = extractor('test.html');
console.log(data);
Output : {"title":"","lang":null,"tags":[],"image":null,"videos":[],"text":""}
The data returns an empty json object. It appears like it cannot read the test.html.
It seems like it doesn't recognise test.html. The example says, "my html data", is there a way to get html data ? Thanks.

From the docs of unfluff:
extractor(html, language)
html: The html you want to parse
language (optional): The document's two-letter language code. This
will be auto-detected as best as possible, but there might be cases
where you want to override it.
You are passing a filename, and it expects the actual HTML of the file to be passed in.
If you are doing this in a scripting context, I'd recommend doing
data = extractor(fs.readFileSync('test.html'));
however if you are doing this in the context of a server or some time when blocking will be an issue, you should do:
fs.readFile('test.html', function(err, html){
var data = extractor(html);
console.log(data);
));

Three .json files 'StockChart' - highcharts

Please help by taking StockChart. Pinning three .json files as in the example , But does not work. The code is below:
www.jsfiddle.net/d8xwjxg7/2

You have an error in your code:
$.getJSON('http://www.iklimat.pl/'+name()+'.php', function (data) {
Should be:
$.getJSON('http://www.iklimat.pl/'+ name +'.php', function (data) {
Since name is a string not a function.
Also, this will not work in a JSFiddle since you cannot load files not from the site the javascript is running on without the endpoint you are accessing setting the access-allow-control-origin header.
EDIT:
I have sorted out the issue you were having getting data, however there is an issue with that data.
http://jsfiddle.net/d8xwjxg7/5/

Codeigniter - sending json to script file

I query the db i my model like so
function graphRate($userid, $courseid){
$query = $this->db->get('tblGraph');
return $query->result();
}
My controller gets data back from my model and I json encode it like so
if($query = $this->rate_model->graphRate($userid, $courseid)){
$data['graph_json'] = json_encode($query);
}
$this->load->view('graph', $data);
And thats returns me a json object like so
[
{"id":"1","title":"myTitle","score":"16","date":"2013-08-02"},
{"id":"2","title":"myTitle2","score":"17","date":"2013-09-02"},
{"id":"3","title":"myTitle3","score":"18","date":"2013-10-02"}
]
In my view graph I'm loading an js file
<script type="text/javascript" src="script.js"></script>
Now I want to use $data that is being sent from my controller to my view, to my external script.js to use as labels and data to feed my chart. But How do I get that Json data to my external script.js so I can use it?
1 more thing about the json data, isn't it possible to get the output of the json data as
{
"obj1":{"id":"1","title":"myTitle","score":"16","date":"2013-08-02"},
"obj2":{"id":"2","title":"myTitle2","score":"17","date":"2013-09-02"},
"obj3":{"id":"3","title":"myTitle3","score":"18","date":"2013-10-02"}
}

The problem isn't a Codeigniter problem, it's a javascript scope/file inclusion/where-do-i-get-my-data-from problem.
I run into this all the time and have used these solutions:
naming my php files with .php extensions and loading them as if they're views.
Just putting the script that needs data from a view IN the view file where it's used
Using an ajax request in my included js file to hit a controller and get json data.
I use #2 most frequently (for things like datatables where I WANT the js code right there next to the table it's referencing.
I use #1 occasionally, but try NOT to do that because it means some .js files are in my webroot/js dir and some are in teh application/views directory, making it confusing for me or anyone else who wants to support this project.
#3 is sometimes necessary...but I like to avoid that approach to minimize the number of requests being made and to try to eliminate totally superfluous requests (which that is).

You need to print the result of the output json string to the html generated file.
But you need to parse the string with some script. I would recommend you: http://api.jquery.com/jQuery.parseJSON/
For the second question. It is possible by doing:
$returnValue = json_encode(
array (
"obj1" => array("id"=>"1","title"=>"myTitle","score"=>"16","date"=>"2013-08-02"),
"obj2" => array("id"=>"2","title"=>"myTitle2","score"=>"17","date"=>"2013-09-02"),
"obj3" => array("id"=>"3","title"=>"myTitle3","score"=>"18","date"=>"2013-10-02"),
)
);

Print the output using PHP like:
echo json_encode($query);
Then from the client-side (where JavaScript resides) load that JSON that you printed using PHP. This can be done easily using JQuery.
Like this:
$.get("test.php", function(data) {
alert("Data Loaded: " + data);
});
You can find more information about this here: http://api.jquery.com/jQuery.get/
Now you'll need to parse this data so that JavaScript can understand what you got as text from the server. For that you can use the JSON.parse method on the "data" object in the aforementioned example. Once parsed, you can use the object like any other object in JavaScript. You can find more information about JSON.parse here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse
I hope that helps.