Sometimes, we want to parse JSON to receive a Date object in JavaScript.
In this article, we’ll look at how to parse JSON to receive a Date object in JavaScript.
How to parse JSON to receive a Date object in JavaScript?
To parse JSON to receive a Date object in JavaScript, we call JSON.parse with our own parsing function.
For instance, we write
const dateTimeReviver = (key, value) => {
let a;
if (typeof value === "string") {
a = /\/Date\((\d*)\)\//.exec(value);
if (a) {
return new Date(+a[1]);
}
}
return value;
};
const obj = JSON.parse(jsonString, dateTimeReviver);
to create the dateTimeReviver functon that checks if the value being parsed is a string with
typeof value === "string"
Then we get the parts that has /\/Date\((\d*)\)\// pattern in it with exec.
If it’s found, then we create a Date object from it.
Otherwise, we return value as is.
Then we call JSON.parse with the jsonString we want to parse and the dateTimeReviver function that we created to parse the JSON string with the dates.
Conclusion
To parse JSON to receive a Date object in JavaScript, we call JSON.parse with our own parsing function.
