In a highly entertaining friendly in ideal weather a capacity crowd saw the home side take the lead inside ten minutes.
Mark Duggan's sideline cut-back after interplay with Alan Cawley reached Daryl Robson 25m back.
He took a touch and launched a stunning curling ball that initially looked like a cross but looped in to beat David Lucas at his far post.
If the visitors were non-plussed by that, worse was to follow on the half-hour when just after a David Prutton shot was well tipped over by Gabriel Sava for a Leeds corner, Peter Sweeney's flag-kick was cleared for a Bray counter-attack that led to Cawley putting Ger Rowe through in the middle, the latter coolly slotting home under Lucas' legs.
Friendlies are often a game of two halves - the first choice for the first half, and the managers' have-a-looks in the second, which frequently changes the game out of all recognition.
It is futile to speculate what might have happened had Eddie Gormley stuck with the initial selection and treated the match as seeking a result.
But Bray had certainly shown as much attacking ability as, and better defending than, the visitors in the first 45'.
The record has to show, however, that early in the second period an Andy Robinson cross was put out for a Leeds corner which Sweeney played short to Robinson, his cross this time reaching skipper Rui Marques for a devastating header at the far post.
Just another quarter of an hour in, and Bray's defence were caught napping when Prutton - always a danger - whipped in a cross from the end-line which found Marcus Haber unmarked in a position to finish off clinically.
Now back on level terms, and with Bray unsettled by a sequence of substitutions, the latest and most crucial perhaps Brian Kane for Sava in the Bray net just a minute earlier, a shot by Leeds substitute Enoch Showunmi rebounded to fellow newbie Jonny Howson who was clear to fire to the net when the new Bray keeper had barely finished adjusting his towel.
A high-octane stylish encounter before a crowd of 5,500 in unusually bright July weather during Bray's Festival week: apart from a win, what more could one ask?
Leeds United: 1 David Lucas; 2 Scott Gardner, 5 Lubomir Michalik, 6 Rui Marques (c), 3 Ben Parker; 11 Andy Robinson, 4 Jonathan Douglas, 7 David Prutton, 8 Peter Sweeney; 9 Marcus Haber, 10 Bradley Johnson
Subs: 12 Casper Ankegren (gk), 14 Frazer Richardson, 15 Alan Sheehan, 16 Paul Huntington, 17 Paul Telfer, 18 Jonny Howson (for Robinson 74), 19 Rob Bayley (for Marques 63). 21 Enoch Showunmi (for Haber 79)
Bray Wanderers: 1 Gabriel Sava; 17 Derek Pender, 5 Derek Foran, 14 Ray Kenny, 3 Gary Cronin; 23 Gareth Coughlan, 8 Alan Cawley (c), 26 Daryl Robson, 16 Mark Duggan; 24 Ger Rowe, 25 Aidan O'Keeffe
Subs: 1 Craig Hyland (gk), 6 Gavin Whelan (for Coughlan 51), 10 Andrew Myler (for Duggan 73), 12 Ronan Ivory (for Cronin H/T), 15 Paul Dunphy (for Rowe 51), 18 Emeka Onwubiko (for O'Keeffe 65, 19 David Webster (for Foran H/T), 20 Philip Knight (for Pender 79), 30 Brian Kane (for Sava 82)
Referee: Tom Connolly