How I fix this error?

Question

Code:
function drawSquare(color) {
square.attr('width', 30)
.attr('height', 30)
.attr('x', 30)
.attr('y', 0)
.attr('fill', color);
};
drawSquare('black');

Error:
Uncaught ReferenceError: square is not defined

Answer 1

You are referring to a variable that is not in your code (square), either you make sure of the casing. Or define square

If you are unable to do that then please provide a link to code that this snippet is from. Someone will be able to help.