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2. Working with Objects and Properties > Deleting Object Properties
Deleting Object Properties
The delete operator can be used
to completely remove properties from an object. Below, we delete the
bar property from the foo object.
<!DOCTYPE html><html lang="en"><body><script>
var foo = {bar: 'bar'};
delete foo.bar;
console.log('bar' in foo); // logs false, because bar was deleted from foo
</script></body></html>Notes
-
Delete will not delete properties that are found on the prototype chain.
-
Deleting is the only way to actually remove a property from an object. Setting the property to
undefinedornullonly changes the value of a property. It does not remove the property from the object.
