Load a json file from JavaScript

README.md

Load JSON file into JS variable

This shows how to load data defined in a json resource into a local variable, in JavaScript code.
The snippet.js loads the content of a baroData.json resource into a variable named graphData.

Enjoy!

snippet.js

const URL = './baroData.json';	
var graphData;

fetch(URL)
    .then(response => {
        console.log(`Response: ${response.status} - ${response.statusText}`);
        response.json().then(doc => {
            graphData = doc;
            console.log(`PRMSL data loaded, ${doc.length} elements`); 
            // Process it here if needed
            // . . .
        });
    }, 
    (error, errmess) => {
        console.log("Ooch");
        let message;
        if (errmess) {
            let mess = JSON.parse(errmess);
            if (mess.message) {
                message = mess.message;
            }
        }
        console.debug("Failed to get PRMSL data..." + (error ? JSON.stringify(error, null, 2) : ' - ') + ', ' + (message ? message : ' - '));
    });