What burden is on an appellant to prove that the trial court committed an error that justifies reversal of the judgment?

burden is on an appellant to demonstrate, on the basis of the record presented to the appellate court, that the trial court committed an error that justifies reversal of the judgment. [Citations.] 'This is not only a general principle of appellate practice but [also] an ingredient of the constitutional doctrine of reversible error.' [Citations.] 'In the absence of a contrary showing in the record, all presumptions in favor of the trial court's action will be made by the appellate court.' " (Jameson v. Desta (2018) 5 Cal.5th 594, 608-609.)