Generate custom CSS clip-path polygon shapes with interactive drag handles. Copy cross-browser CSS rules, SVG path code, and responsive percentage coordinates.
-webkit-clip-path: polygon(
0.0% 0.0%,
100.0% 0.0%,
100.0% 85.0%,
0.0% 100.0%
);
clip-path: polygon(
0.0% 0.0%,
100.0% 0.0%,
100.0% 85.0%,
0.0% 100.0%
);Generate custom CSS clip-path polygon shapes with interactive drag handles. Copy cross-browser CSS rules, SVG path code, and responsive percentage coordinates.
Standard W3C CSS Shapes Module Level 1 functional notation. Accepts an optional fill-rule ('nonzero' or 'evenodd') followed by comma-separated coordinate pairs. Each coordinate pair consists of two space-separated length-percentage values (X Y).
Determines how self-intersecting polygon paths and nested interior cutouts are evaluated. 'nonzero' fills all enclosed vector loops; 'evenodd' alternates fill state at each ray boundary, enabling geometric donut cutouts and hollow frame masks.
Defines the coordinate bounding box anchor for percentage calculations. Options include 'border-box' (includes borders), 'padding-box' (excludes borders), 'content-box', or SVG 'fill-box'/'stroke-box'/'view-box'. Defaults to 'border-box' for HTML elements.
For SVG <clipPath> definitions. 'objectBoundingBox' normalizes coordinates to fractions between 0.0 and 1.0 relative to the target element bounding box; 'userSpaceOnUse' locks coordinates to the absolute SVG canvas coordinate system.
Instructs the browser rendering engine to promote the clipped element to its own GPU compositor layer before animation begins, preventing CPU paint cycles and maintaining 60/120 FPS during keyframe shape transformations.
CSS transitions and @keyframes on clip-path only interpolate smoothly when both the starting and ending polygon states contain the exact same number of vertices in the exact same index order. If a 3-point triangle morphs into an 8-point octagon, the browser cannot interpolate geometry and abruptly snaps at 50%. Solution: Insert collinear dummy points along the triangle edges so both shapes declare exactly 8 vertices.
To create a hollow window, donut ring, or photo frame cutout within a single CSS polygon, declare 'polygon(evenodd, ...)'. Trace the exterior outer boundary clockwise (0% 0% to 100% 100%), then create a bridge cut into the interior and trace the inner cutout window counter-clockwise. The 'evenodd' ray-casting algorithm subtracts the interior island, creating a transparent center.
Unlike 'opacity: 0' or 'border-radius' which still capture clicks in rectangular transparent corners, 'clip-path' strictly restricts user pointer events (click, hover, touch) to the visible polygon interior. Clicks outside the clipped polygon boundary pass through seamlessly to underlying DOM elements without requiring 'pointer-events: none'.
When tiling adjacent polygon-clipped elements (such as split-screen diagonal hero sections), GPU antialiasing rasterization can cause a faint 1-pixel background seam line to flicker between shapes. Neutralize this by adding a microscopic 0.2% overlap to the shared edge coordinates or applying 'outline: 1px solid transparent' to force smooth GPU edge blending.
Check the vertex count in both CSS animation keyframes. CSS polygon interpolation strictly requires matching coordinate pair counts. Use this generator's 'Vertex Normalizer' to add collinear anchor points to the simpler shape so both states possess identical vertex lengths.
The 'clip-path' property clips all descendant rendering and box-shadows outside its boundary, and creates a local stacking context. Move drop-shadows to a parent wrapper using 'filter: drop-shadow(...)', and render popovers or tooltips through a React Portal appended directly to the document body.
WebKit requires the vendor prefix for older iOS/macOS releases (Safari 13 and earlier). Always include '-webkit-clip-path: polygon(...)' immediately before the standard un-prefixed 'clip-path' property in your CSS stylesheet.
When polygon edges cross over each other, the default fill-rule evaluates winding numbers that may invert enclosed regions. Untangle crossed vertex handles on the interactive canvas, or switch the fill-rule parameter to 'nonzero' to fill all overlapping vector contours.
A CSS clip-path polygon is created using the syntax 'clip-path: polygon(x1 y1, x2 y2, ...)', where each vertex is defined by horizontal (X) and vertical (Y) coordinates separated by a space, with each vertex pair separated by a comma. Coordinates are typically expressed as percentages relative to the element's bounding box (from 0% 0% at the top-left to 100% 100% at the bottom-right). Modern browsers support direct percentage and pixel units with hardware GPU acceleration.
Yes, CSS clip-path polygons can be fully animated using standard CSS 'transition: clip-path 0.4s ease' or '@keyframes' animations, provided that both the initial and final states contain the exact same number of vertices. If the vertex counts differ, browsers cannot interpolate coordinates and will instantly jump between shapes. You can morph any shape into another by padding the simpler shape with collinear dummy points that match the target shape's vertex count.
CSS 'clip-path: polygon()' is lightweight, defined directly in pure CSS without HTML markup, and supports responsive percentages natively, but is limited to straight-line vertices. SVG '<clipPath>', by contrast, supports smooth cubic/quadratic bezier curves (<path>), circle/ellipse primitives, and text masking, but requires defining an SVG element in the DOM and referencing it via 'clip-path: url(#id)'. For straight-edged geometric shapes, CSS polygon delivers significantly faster rendering and zero DOM overhead.
By W3C specification, CSS 'clip-path' clips the element's hit-testing region along with its visual paint. Areas outside the polygon boundary do not register clicks, hovers, or cursor events, allowing underlying DOM elements to be clicked naturally. If clicks are blocked, verify that a parent container without clip-path is not capturing pointer events, or that an unclipped pseudo-element (::before/::after) is not overlaying the page.
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