The attributes of payload in chapter 9 of version 20211015

[waihon]

On page 125, the saveSong() has a payload with attributes having a key-value pair, i.e. attributes: { title: this.title }.

On page 127, the updateRating() has a payload with just attributes: { rating }.

May I know why { rating } would work and not { rating: rating }?

[balinterdi]

{ rating } is a shorthand for { rating: rating } so both work but you see the short-hand form quite often these days as it's quite elegant (and you don't have to type that much :) ).

You can't use a shorthand for { title: this.title } as this is not the same as { title: title }.