delete undefined from object javascript code example

Example 1: js remove undefined from object

Object.keys(obj).forEach(key => obj[key] === undefined && delete obj[key])

Example 2: remove undefined values from object javascript

var obj = { a: 1, b: undefined, c: 3 }
console.log(JSON.parse(JSON.stringify(obj)));
Output: {a: 1, c: 3}