The easiest and SAFEST way is to jack the front up under the cross member, then lower the front control arms onto jackstands. The weight of the car will ensure that the springs stay compressed.

Using a jack to hold the spring force is foolish and dangerous! The only thing that might knock the car off jackstands under the control arms is another massive object running into it or a big earthquake. A wheeled jack can slide out or slip.

Since the strut is a gas type you will have to compress it a bit to get it onto the pin on the knuckle, but I had no problem doing this by hand.

It's a very easy job. I also removed the upper strut mounts for a cleaning and inspection and mine were both like new. Also inspect the jounce bumper.

Duke