If the hidden element contains focusable content, the page will scroll to the element when it is in focus, creating a sudden jump. Invisible elements are inaccessible to screen readers and won’t register events, as we see in the following demo that’s exactly the same as the last example, but merely swaps display: none with visibility: hidden. In fact, elements hidden with visibility and display behave the same in terms of accessibility and event triggers. You’re physically there, even if you’re invisible to the human eye.īut that’s where the differences between “visually hidden” and “not displayed” end. Imagine you’re wearing an invisible cloak that makes you invisible to others, but you are still able to bump into things. This means that the element’s box model is present, giving it dimensions that continue to occupy space on the screen even though it doesn’t appear to be there. If an element’s visibility property is set to hidden, then the element is “visually hidden.” Being “visually hidden” sounds a lot like what display: none does, but it’s incredibly different in that the element is generated and rendered, but invisible. Will the hidden element’s box model be rendered? Will the hidden element affect the document layout? Is the hidden content read by a screen reader?
HIDE WORDS IN A PICTURE DOWNLOAD
The only exception is IE 11, which will download images in both cases. This behavior is matched across all latest browsers. On the other hand, when we apply the image to an element with a background property, the image won’t be downloaded because the parser hasn’t applied the CSS where the image is called. This is the case because the parser hasn’t applied the CSS when an HTML document is parsed and it encounters an tag. On the other hand, if the image is applied with a background property, it won’t be downloaded. If an image tag (or parent element) has a display property set to none either through inline CSS or by selector, the image will be downloaded.
All three buttons have click events but only the two visible buttons will render and register the clicks.ĭisplay is the only property that will affect image request firing. Here, we have two visible buttons and one hidden with display: none. And as we’ve discussed already, all the content will be ignored by screen readers. The box model will not generate nor appear on the page, which also applies to all its children.Īnd what’s more, if the element has any event listeners - say a click or hover - they won’t register at all. The element will still show in the markup, if you inspect the page you will be able to see the element. It’s in the DOM, but never actually rendered. And as we established, using it to hide an element means that the element is not generated at all. We kicked off this post with a caution about using display to hide content. Again, we’ll put everything together at the end in a way that we can use it as a reference for making decisions when hiding things in CSS. Now that we have our criteria out of the way, let’s compare the methods.
Rendering: Will the hidden element’s box model be rendered?.Document flow: Will the hidden element affect the document layout?.Accessibility: Is the hidden content read by a screen reader?.I decided to break that down by asking questions focused on four particular areas that affect layout, performance and accessibility: Metrics that we’ll use to compare the methods. To see a difference between different ways of hiding content, we must introduce some metrics.
HIDE WORDS IN A PICTURE HOW TO
How to spot differences between the techniques We’re going to review each technique here and cap things off with a summary that helps us decide which to use and when. The fact is that there are many ways to “hide” things in CSS, each with their pros and cons which greatly depend on how it’s being used. It’s tempting to use it, but especially in cases where something is only meant to be visually hidden, don’t reach for it. Unfortunately, this way of hiding content isn’t bulletproof because now that content is now “inaccessible” to screen readers. You would think that hiding content with CSS is a straightforward and solved problem, but there are multiple solutions, each one being unique.ĭevelopers most commonly use display: none to hide the content on the page.
0 kommentar(er)
