enter image description here I have added this check button into the card, and added position into it so I can put it in the corner on the left, but when I get the button out of the card corner I got disappear , even when I use z-index!
That's because you have overflow: hidden; set for the .note-card. If you want to keep it, you will have to move your check outside that container or switch to overflow: visible and deal with the cut-off text differently, either by making the box taller, shortening text, or wrapping that text in another div that then would have the overflow: hidden to just cut off the text.
