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Alex Rivera
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Using <canvas> , I want to set the RGBa value of the rectangle using a variable. for example: ctx.fillStyle = "rgba(32, 45, 21, 0.3)"; works fine, but using it with a variable: var r_a = 0.3; ctx.fillStyle = "rgba(32, 45, 21, r_a)"; doesn't work. Apparently fillStyle only accepts a string. So how do I set a value of the rgba value using some variable instead of explicitly defining the values?
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