Plotly JS method to dynamically use the full height/width of a div

Question

When the top button is clicked, the size of the container #myDiv changes. How can I make Plotly automatically occupy all available space in a container,without any noticeable delay?

There is some higher latency here:

var z = [], steps = [], i;
for (i = 0; i < 500; i )
    z.push(Array.from({length: 600}, () => Math.floor(Math.random() * 100)));
for (i = 0; i < 100; i )
    steps.push({ label: i, method: 'restyle', args: ['line.color', 'red']});
var data = [{z: z, colorscale: 'YlGnBu', type: 'heatmap'}];
var layout = {title: '', sliders: [{
    pad: {t: 5},
    len: 1,
    x: 0,
    currentvalue: {xanchor: 'right', prefix: 'i: ', font: {color: '#888', size: 20}},
    steps: steps
  }]};
Plotly.newPlot('myDiv', data, layout);
document.getElementById('button').onclick = () => {
    document.getElementById('myDiv').classList.toggle('size2');
    Plotly.Plots.resize('myDiv');
}

#button { background-color: gray; }
#myDiv { width: 500px; height: 300px; border: 2px solid black; }
.size2 { width: 300px !important; height: 200px !important; }

<script src="https://cdn.plot.ly/plotly-2.16.2.min.js"></script>
<span id="button">Click here to change size</span>
<div id="myDiv"></div>
<div id="text">Hello world</div>

Answer 1

To make Plotly automatically occupy all available space of the container, you can use the 'autosize' option in the layout object.

var layout = {
    title: '',
    autosize: true,
    sliders: [{
        pad: {t: 5},
        len: 1,
        x: 0,
        currentvalue: {
            xanchor: 'right',
            prefix: 'i: ',
            font: {
                color: '#888',
                size: 20
            }
        },
        steps: steps
    }]
};