chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const x = d3.scaleLinear().domain([0, 1]).range([margin.left, width - margin.right])
const y = d3.scaleLinear()
.domain([0, 1])
.range([height - margin.bottom, margin.top])
svg.append("g")
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x));
svg.append("g")
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y));
return svg.node();
}