Mateusz Klich opened the scoring for Leeds with a brilliant, curling effort before Tom Lawrence responded with a dipping freekick in an entertaining opening.
Parity did not last long, however, with Kemar Roofe restoring the visitors' lead with a commanding header before the forward added his second with a sumptuous turn and finish after the break.
Ezgjan Alioski sealed an eye-catching victory with a powerful header as Leeds produced a stunning attacking display.
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Alongside Aston Villa and Swansea City, Leeds are one of three sides with a 100 percent start and trail only table-topping Middlesbrough -- who have played one more game -- after they beat Birmingham City 1-0.
Earlier on Saturday Villa were 3-2 victors against Wigan Athletic and Jay Fulton scored the only goal as Swansea beat Preston North End to make it two wins from their opening two matches.
Former England forward Jay Rodriguez scored twice as relegated West Bromwich Albion got their first win of the season in a sensational 4-3 victory at Norwich City.
Elsewhere, Stoke City claimed their first point with a 1-1 draw against Brentford, Bristol City came from two goals down to draw 2-2 at Bolton and Nottingham Forest beat Reading 1-0.
Sheffield United beat Queens Park Rangers 2-1, city rivals Wednesday drew 1-1 with Hull City, Rotherham United beat Ipswich Town 1-0 and Blackburn Rovers and Millwall played out a goalless draw.
(Reporting by Steve Tongue,; Editing by Neville Dalton)
