 dimensions of the visualisation (width and height). However, think how rarely (if ever) one specifies these parameters when using plotly, highcharter or leaflet. Indeed HTML visualisations should be responsive and fit the container they are placed in—not to be confused though, these are two different things. This enables creating visualisations that look great on large desktop screens as well as the smaller mobile phones or iPad screens. Pre-defining the dimensions of the visualisation (e.g.: <code>400px