In JavaScript, you can parse a JSON file using the JSON.parse() method. Here is a sample JSON file:
{
"name": "John Doe",
"age": 32,
"address": {
"street": "123 Main St",
"city": "Anytown",
"state": "CA"
}
}
Here is some sample code that uses the Node.js-based fs module's readFile method to load the above file from disk and then uses the JSON.parse method to parse it into a JavaScript object:
var fs = require('fs');
fs.readFile('file.json', 'utf-8', function (err, data) {
if (err) throw err;
var obj = JSON.parse(data);
console.log(obj);
});
If you want to parse a JSON string in the browser, you can use the same JSON.parse method. However, if you are using the fetch API to load a remote file/API, you can simply use the json method of the response object. Here is an example:
<script>
fetch('http://httpbin.org/ip')
.then(res => res.json())
.then((data) => {
console.log(data);
}).catch(err => console.error(err));
</script>