make grid simplify subplots (mixed plots not working currently)

Usecase:
User should be able to draw subplots with ease by using grid option.
User has 4 diff graphs and he wants to put them together, in grid by using following option without getting into much complexity

grid: {
    rows: 2,
    columns: 2,
    pattern: "independent"
  }
}

Ease of use:
It will be great to have similat functionality like provided in python plotly where user can define rows, columns, colspan and rowspan in data. Its plain and dead easy.

from plotly.subplots import make_subplots
import plotly.graph_objects as go

fig = make_subplots(
    rows=5, cols=2,
    specs=[[{}, {"rowspan": 2}],
           [{}, None],
           [{"rowspan": 2, "colspan": 2}, None],
           [None, None],
           [{}, {}]],
    print_grid=True)

Reference:
python plotly.subplots has given functionality with much ease of use. see HERE. Same is needed for js Please

Code Pen:
https://codepen.io/mafar/pen/YzZEdLR?editors=0010

JS CODE:

var trace1 = {
  type: "bar",
  y: [2, 3, 1]
};

var trace2 = {
  r: [2, 3, 1],
  theta: [0, 45, 90],
  type: "barpolar"
};

var trace3 = {
  type: "pie",
  values: [2, 3, 1]
};

var trace4 = {
  mode: "lines",
  type: "scatter3d",
  x: [2, 3, 1],
  y: [0, 0, 0],
  z: [0.5, 1, 2]
};

var data = [trace1, trace2, trace3, trace4];

var layout = {
  grid: {
    rows: 2,
    columns: 2,
    pattern: "independent"
  }
};

Plotly.newPlot("myDiv", data, layout);

Beginne damit, das Beispiel mit gemischten bar-, barpolar-, pie- und scatter3d-Diagrammen über Plotly.newPlot zu reproduzieren, und vergleiche es mit dem verlinkten CodePen. Lies das bestehende Verhalten des Grid-Layouts und die Referenz zu Subplots von Python Plotly und definiere anschließend, was die Unterstützung für rows, columns, unabhängige gemischte Plots, colspan und rowspan erfordern würde; abgeschlossen ist die Aufgabe, wenn das Beispiel ohne manuelle Subplot-Konfiguration funktioniert.