Features

PPTX Rendering Capabilities

Supported

• Backgrounds: Solid colors, linear gradients, rounded rectangles
• Borders: Four-side independent borders (solid, dashed, dotted, double)
• Text: Font family, size, color, bold, italic, underline, strikethrough
• Text Layout: Multi-line wrapping, list items (ordered/unordered with bullets)
• Images: object-fit (contain, cover, scale-down)
• Slides: Multiple slides from element array
• Stacking: Full CSS stacking context (7-layer painting order)
• Rotation: CSS rotate property and transform: rotate()
• Box Shadow: Outer and inner shadows (first shadow used, spread not supported)
• Clip-Path: circle(), ellipse(), polygon(), inset(), path() via canvas rasterization

Not yet supported

• Radial gradients
• URL background images
• opacity blending
• CSS filter effects
• SVG/Canvas element rendering to PPTX
• Complex CSS transforms (scale, skew, 3D) in PPTX output

Supported CSS Properties

The following CSS properties are parsed from the DOM and used during PPTX rendering. Not all properties have a direct PPTX equivalent -- some are used for layout calculation only.

• background
  • background-clip
  • background-color
  • background-image
    • linear-gradient()
  • background-origin
  • background-position
  • background-size
• border
  • border-color
  • border-radius
  • border-style
  • border-width
• bottom
• box-shadow
• box-sizing
• clip-path
  • inset()
  • circle()
  • ellipse()
  • polygon()
  • path()
• content
• color
• display
• flex
• float
• font
  • font-family
  • font-size
  • font-style
  • font-variant
  • font-weight
• height
• image-rendering
• left
• letter-spacing
• line-break
• list-style
  • list-style-image
  • list-style-position
  • list-style-type
• margin
• max-height
• max-width
• min-height
• min-width
• opacity
• overflow
• overflow-wrap
• padding
• paint-order
• position
• right
• text-align
• text-decoration
  • text-decoration-color
  • text-decoration-line
  • text-decoration-style
• text-overflow
• text-shadow
• text-transform
• top
• transform (layout calculation only)
• visibility
• white-space
• width
• word-break
• word-spacing
• word-wrap
• z-index
• object-fit
• rotate
• -webkit-text-fill-color

Unsupported CSS Properties

These CSS properties are not currently supported:

• background-blend-mode
• border-image
• box-decoration-break
• filter
• font-variant-ligatures
• mix-blend-mode
• object-position
• repeating-linear-gradient()
• writing-mode
• zoom