Media queries present a good way to programmatically change conduct relying on viewing state. We are able to goal kinds to machine, pixel ratio, display dimension, and even print. That stated, it is also good to have JavaScript occasions that additionally enable us to vary conduct. Do you know you are supplied occasions each earlier than and after printing?
I’ve all the time used @media print in stylesheets to regulate print show, however JavaScript supplies beforeprint and afterprint occasions:
operate toggleImages(disguise = false) {
doc.querySelectorAll('img').forEach(img => {
img.type.show = disguise ? 'none' : '';
});
}
// Disguise photos to avoid wasting toner/ink throughout printing
window.addEventListener('beforeprint', () => toggleImages(true))
window.addEventListener('afterprint', () => toggleImages());
It could sound bizarre however contemplating print is essential, particularly when your web site is documentation-centric. In my early days of internet, I had a shopper who solely “considered” their web site from print-offs. Styling with @media print is often one of the best choices however these JavaScript occasions could assist!
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