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Responsive printing docs #5167

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Jan 21, 2018
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Responsive printing docs #5167

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12 changes: 12 additions & 0 deletions docs/general/responsive.md
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Expand Up @@ -33,3 +33,15 @@ The chart can also be programmatically resized by modifying the container size:
```javascript
chart.canvas.parentNode.style.height = '128px';
```

## Printing Resizeable Charts

CSS media queries allow changing styles when printing a page. The CSS applied from these media queries may cause charts to need to resize. However, the resize won't happen automatically. To support resizing charts when printing, one needs to hook the [onbeforeprint](https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeprint) event and manually trigger resizing of each chart.

```javascript
function beforePrintHandler () {
for (var id in Chart.instances) {
Chart.instances[id].resize()
}
}
```