Get JSON from local JavaScript

Question

good afternoon. I'm developing an app that can get a JSON from local (manifest.json). I want to get this file from JavaScript and then read it. But I have a problem, I cant call this file. How can I?

var urlJSON = new XMLHttpRequest("manifes.json").toString;
var dataJSON = JSON.parse(urlJSON);

alert(dataJSON.name);

First do console.log(urlJSON) to see what actually contains this variable. — Al.G.
– Al.G., Commented Sep 24, 2016 at 17:56
i think your spelling for filename is wrong var urlJSON = new XMLHttpRequest("manifest.json").toString; — Aatif Bandey
– Aatif Bandey, Commented Sep 24, 2016 at 17:59
That is not how you use XMLHttpRequest, Using XMLHttpRequest. Also what do you mean by "local"? The user's hard drive? That cannot be done, without the user selecting it through some process like a file input — Patrick Evans
– Patrick Evans, Commented Sep 24, 2016 at 17:59

score 2 · Accepted Answer · 2016-09-25 04:41:20Z

2

var xmlhttp = new XMLHttpRequest();
var url = 'manifest.json';
xmlhttp.onreadystatechange = function() {
  if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
    console.log(JSON.parse(xmlhttp.responseText));
  }
  if (xmlhttp.status == 404) {}
};
xmlhttp.open('GET', url, true);
xmlhttp.send();

Or run chrome with arguments --allow-file-access-from-files
Or download and create server for your app

edited Sep 25, 2016 at 4:41

answered Sep 24, 2016 at 18:00

user3945261

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1 Comment

Fernando Pérez Lara Over a year ago

It says "XMLHttpRequest cannot load file:///C:/Users/ferna/Desktop/The%20pong/manifest.json. Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https, chrome-extension-resource".

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