Adrian Kempe tied it 2-all when he tipped Kopitar's shot in during a power play for his very first goal of the season at 10:06.
The Canucks led 2-1 after the first period on 2 late power-play goals, with Horvat redirecting Quinn Hughes' one-timer from long variety with 26 seconds staying to take the lead.
Boeser scored for the third straight game with a sharp-angle shot from the left circle that connected it 1-all at 17:39 set up by a slap pass from Pettersson.
Carter put the Kings ahead 1-0 at 3:53 after fabricating out Markstrom and beating him with a backhand. Kopitar had the primary help, discovering Carter alone in the slot on the rush, for his 900th point in 1,016 video games.
Carter included a consolation objective at 18:49 of the 3rd period.
Brock Boeser had a hat technique and the Vancouver Canucks defeated the Los Angeles Kings 5-3 on Wednesday night.
Elias Pettersson had a goal and three helps, and the Canucks improved to 8-1-1 in their past 10 games. Bo Horvat added a power-play goal, and Jacob Markstrom made 21 conserves.
Anze Kopitar had 2 assists and passed 900 career points, however the Kings lost their fourth straight video game. Jeff Carter scored two times and Jonathan Quick made 44 conserves.
Boeser finished his third NHL hat trick 55 seconds into the 3rd period when his shot rerouted in off Drew Doughty's skate during a power play to provide the Canucks a 4-2 lead. Boeser has 5 goals in his past 3 video games.
Boeser put Vancouver back in front 3-2 at 15:17 of the 2nd when Pettersson's pass began a breakaway as the Kings were making a line modification.
Pettersson made it 5-2 at 15:46, getting the Canucks' fourth power-play objective. He has two goals and 10 assists throughout a five-game point streak, including several assists in four of his previous five video games.