![]() All you have to do is using the responsive class. To support resizing charts when printing, one needs to hook the onbeforeprint event and manually trigger resizing of each chart. If your project is based on the Bootstrap framework then making images responsive is pretty simple. However, the resize won't happen automatically. The CSS applied from these media queries may cause charts to need to resize. The chart can also be programmatically resized by modifying the container size: .height = '128px' ĬSS media queries allow changing styles when printing a page. Responsiveness can then be achieved by setting relative values for the container size ( example): However, this method requires the container to be relatively positioned and dedicated to the chart canvas only. Chart.js uses its parent container to update the canvas render and display sizes. Gets passed two arguments: the chart instance and the new size.ĭetecting when the canvas size changes can not be done directly from the CANVAS element. Maintain the original canvas aspect ratio (width / height) when resizing.Ĭalled when a resize occurs. ![]() ![]() Resizes the chart canvas when its container does ( important note.).ĭuration in milliseconds it takes to animate to new size after a resize event. : invalid behavior, the canvas is resized but becomes blurry ( example)Ĭhart.js provides a few options to enable responsiveness and control the resize behavior of charts by detecting when the canvas display size changes and update the render size accordingly.: invalid values, the canvas doesn't resize ( example).Furthermore, these sizes are independent from each other and thus the canvas render size does not adjust automatically based on the display size, making the rendering inaccurate. height) can not be expressed with relative values, contrary to the display size ( and. When it comes to change the chart size based on the window size, a major limitation is that the canvas render size ( canvas.width and. Set display: flex on the container div Wrap each image in a div Set the flex property of each images wrapper div to the images aspect ratio (its width.
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