The position-try-fallbacks property lists alternative placements for an anchor-positioned element. Each entry may be a @position-try name, a tactic (flip-*), or a position-area. The browser tries them when the primary placement overflows..tooltip {
position-try-fallbacks: flip-block;
}.menu {
position-try-fallbacks: --bottom-aligned, flip-block flip-inline, top;
}noneNo fallbacks (default).flip-blockMirrors placement across the block axis (top↔bottom).flip-inlineMirrors placement across the inline axis (left↔right).flip-xMirrors across the x axis.flip-yMirrors across the y axis.flip-startDiagonal swap of start/end properties.flip-block, flip-inlineFallback list: first flips the block axis, then the inline axis (separately).flip-block flip-inlineFlips both block and inline axes simultaneously.CSS Anchor Positioning Module Level 1Editor's DraftW3CMDN
