Skip to content

Instantly share code, notes, and snippets.

@juanbrusco
Last active June 27, 2019 18:04
Show Gist options
  • Save juanbrusco/f8a0c880b1e55c54600ef3500f7eb8fa to your computer and use it in GitHub Desktop.
Save juanbrusco/f8a0c880b1e55c54600ef3500f7eb8fa to your computer and use it in GitHub Desktop.
Clone object (avoid mutation) - Javascript
// https://scotch.io/bar-talk/copying-objects-in-javascript
private clone(obj) {
let copy;
// Handle the 3 simple types, and null or undefined
if (null == obj || "object" != typeof obj) return obj;
// Handle Date
if (obj instanceof Date) {
copy = new Date();
copy.setTime(obj.getTime());
return copy;
}
// Handle Array
if (obj instanceof Array) {
copy = [];
for (let i = 0, len = obj.length; i < len; i++) {
copy[i] = this.clone(obj[i]);
}
return copy;
}
// Handle Object
if (obj instanceof Object) {
copy = {};
for (let attr in obj) {
if (obj.hasOwnProperty(attr)) copy[attr] = this.clone(obj[attr]);
}
return copy;
}
throw new Error("Unable to copy obj! Its type isn't supported.");
}
@juanbrusco
Copy link
Author

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment