WA resident moving to CA and sell primary residence in WA

Hi,

I am relocating from WA to CA by the end of the year. My primary residence has appreciated a lot and when I sell, there will be significant capital gain even after 250k deduction. My question is, if I move to CA first and then sell my house in WA in the following months, will the gain taxed by California? Looking at the documentation, CA tax income of all source even when I become part-year resident. Does that mean I have to sell my home in WA while staying in WA to avoid being taxed by CA?

Thanks!