World Cup victor Kante's untidy 34th-minute volley and Jorginho's audacious penalty on the stroke of halftime put Chelsea in control before Pedro wrapped up the points in the closing stages. He could have won more trophies.
Hazard came on for Willian for just his second outing since the FIFA World Cup and poked a pass through the legs of Terence Kongolo for Pedro to lift Chelsea's third beyond Hamer and round off a routine win.
Jorginho then whispered something to Hazard that caused the Belgian to burst out laughing.
Huddersfield, employing a three-man backline, had impressed in the first half and could have cancelled out Kante's opener but Steve Mounie headed against the inside of the post.
A strike from World Cup victor N'Golo Kante, Jorginho's penalty on debut and a late goal for Pedro were enough to hand Maurizio Sarri a first win in the Premier League.
One striker who will not be scoring goals for Chelsea this season is Michy Batshuayi, who has joined Valencia on a season-long loan.
Arsenal vs Manchester City, Premier League 18-19
Emery is convinced the Gabon worldwide can win the Premier League's Golden Boot this season. That is why it is fascinating, it is a new challenge.
"We have to improve to defend in the other half, to press against three defenders".
"I wish him good luck at Real Madrid, but now we have to concentrate on Kepa because he's our goalkeeper".
Chelsea's Premier League era under Maurizio Sarri is off to a superb start.
Well, for Chelsea's sake they would be hoping that their star does not decide to leave him now and can play till the end of his contract.
"It's never easy to adapt to a new style of play, but I think we did well". I saw our spirit, togetherness and good attitude today, which is what we will need to be competitive this season.
It was telling that Chelsea's first two goals came from their only two shots on target in the first half, and that one of those was a penalty, awarded for Christopher Schindler's foul on Marcos Alonso after a nice flick from Ross Barkley. I don't know. The situation until now has been very hard. We made too many mistakes and missed our chances.