width;
	const left_piece_x = slider_margin_left + dw * lb01 + 6;
	const right_piece_x = slider_margin_left + dw * ub01 - 6;
	const right_piece_text = x_template.replace("%x", ub.toFixed(0)) + "]";
	const right_width = ctx.measureText(right_piece_text).width;
	if(right_piece_x - left_piece_x - right_width - 12 > left_width)
		ctx.fillText(left_piece_text, left_piece_x, slider_h - slider_margin_bottom - 6);
	else
		ctx.fillText(left_piece_text + " " + right_piece_text, left_piece_x, slider_h - slider_margin_b