如何清除和更改画布的背景颜色？

Question

Background colour has to be changed with the colour I'm drawing with.

So if i'm drawing with the colour red on the canvas I want to click the clear button and the canvas div will clear all the drawings and change the background colour to red.

Here is what I have so far but I don't know how to change the colour to the one I have selected

function ClearCanvas(sColour) {
    DebugMessage("Clear Canvas");
    const context = oCanvas.getContext('2d');
    context.clearRect(0, 0, oCanvas.width, oCanvas.height);
    document.getElementById("1Canvas").style.background = "____";
}

Answer 1

When you draw a color on the canvas, you need to change the fillStyle to the color you wish. Changing the background-color of a canvas won't work.

 const canvas = document.getElementById("canvas"); const ctx = canvas.getContext("2d"); const colors = ["blue", "green", "red", "pink", "purple", "grey", "black"]; function draw(color) { //This line is actually not even needed... ctx.clearRect(0, 0, canvas.width, canvas.height); ctx.rect(0, 0, canvas.width, canvas.height); ctx.fillStyle = color; ctx.fill(); } let i = 0; setInterval(() => { draw(colors[i]); i = (i + 1) % colors.length; }, 1000); 

 <canvas id="canvas">