Computed property name
Also written: computed key
Square brackets around an object key, as in `{ [name]: value }`, which use the variable's value as the key. This lets one `handleChange` update whichever form field changed.
Also written: computed key
Square brackets around an object key, as in `{ [name]: value }`, which use the variable's value as the key. This lets one `handleChange` update whichever form field changed.