javascript - Konva - clear layer but keep the background - Stack Overflow

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Im trying to clear the layer from every circle and line (remove it pletely) but keep the image in the background.

If I use layer.clear() it removes the image also.

Question: How to clear the layer but avoid removing the image?

Im trying to clear the layer from every circle and line (remove it pletely) but keep the image in the background.

If I use layer.clear() it removes the image also.

Question: How to clear the layer but avoid removing the image?

https://codesandbox.io/s/sharp-night-t4vtt

• javascript
• konvajs

Share Improve this question Follow asked Sep 3, 2019 at 10:18 PatrickkxPatrickkx 1,88099 gold badges3838 silver badges6666 bronze badges

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1 Answer 1

Sorted by: Reset to default 4

layer.clear() do not remove objects from the scene. It is just clear canvas element and on the next layer.draw() all objects will be drawn again.

Instead of layer.clear() you need to remove objects, that you don't need anymore. From the demo, I see that you need to remove lines and circles. You can use layer.find(selector) to find that nodes and destroy them.

document.getElementById("btn").addEventListener("click", () => {
  layer.find('Line').destroy();
  layer.find('Circle').destroy();
  layer.draw();
});

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