“Erasing” in html5 canvas

by

If you want to draw a black transparent stroke, you probably want:

context.globalCompositeOperation = "destination-out";
context.strokeStyle = "rgba(0,0,0,1)";

Remember to save the previous globalCompositeOperation and then restore it later or transparency won’t work properly!

More Related Contents:

  1. Canvas width and height in HTML5
  2. HTML5 Canvas Rotate Image
  3. Html5 canvas drawImage: how to apply antialiasing
  4. Drawing an SVG file on a HTML5 canvas
  5. html5 – canvas element – Multiple layers
  6. How can I convert an HTML element to a canvas element?
  7. How to Copy Contents of One Canvas to Another Canvas Locally
  8. Drawing text to with @font-face does not work at the first time
  9. How to draw a rounded rectangle using HTML Canvas?
  10. What’s the best way to set a single pixel in an HTML5 canvas?
  11. How to change the opacity (alpha, transparency) of an element in a canvas element?
  12. How do I make a transparent canvas in html5?
  13. using HTML5 Canvas – rotate image about arbitrary point
  14. How to make rooftext effect and valley text effect in HTML5 (or Fabric.js)
  15. Can you take a “screenshot” of the page using Canvas?
  16. get click event of each rectangle inside canvas?
  17. HTML5 Canvas getImageData and Same Origin Policy
  18. How can I write text on a HTML5 canvas element?
  19. Animated GIF in HTML5 canvas
  20. Chart.js canvas resize
  21. Drawing a dot on HTML5 canvas [duplicate]
  22. HTML5 Canvas background image
  23. Placing a within a
  24. Combining two or more Canvas elements with some sort of blending
  25. All html canvas shapes are given the color of the last object added
  26. What is the difference between SVG and HTML5 Canvas?
  27. How can I use custom fonts in an HTML5 Canvas element?
  28. Subpixel anti-aliased text on HTML5’s canvas element
  29. Draw SVG on HTML5 Canvas with support for font element
  30. Content Security Policy: “img-src ‘self’ data:”

Leave a Comment