What just happened in France's shock election?

From bbc.com

Nobody expected this. High drama, for sure, but this was a shock. When the graphics flashed up on all the big French channels, it was not the far right of Marine Le Pen and her young prime minister-in-waiting Jordan Bardella who were on course for victory. It was the left who had clinched it, and Emmanuel Macron's centrists had staged an unexpected comeback, pushing the far-right National Rally (RN) into third. Jean-Luc Mélenchon, the veteran left-wing firebrand seen by his critics as an extremist, wasted no time in proclaiming victory. "The president must call on the New Popular Front to govern," he told supporters ... (full story)