I've been trying to create the following animation:
(1) I have a button consisting of a white 100x100 box on top of a black 100x100 box.
(2) Clicking on the button makes the white box disappear into the black box.
(see the result here)
// html
<div class="button">
<div class="white u-on-top"></div>
<div class="black"></div>
</div>
// css
.button {
width: 100px;
height: 100px;
margin: 10px;
position: relative;
display: inline-block;
.white {
width: 100%;
height: 100%;
background: #fff;
border: 1px solid #000;
position: absolute;
transition: .5s;
}
.black {
width: 100%;
height: 100%;
background: #000;
border: 1px solid #000;
}
}
.u-on-top {
z-index: 1;
}
.u-at-bottom {
z-index: -1;
}
// javascript
var btn = document.querySelector(".button");
var btnState = false;
btn.addEventListener("click", () => {
var btnw = btn.querySelector(".white");
if (!btnState) {
btnw.style.transform = "scale(0)";
btnState = true;
} else {
btnw.style.transform = "scale(1)";
btnState = false;
}
})
(3) What I've unsuccessfully been trying to do is to also make the black box disappear into the white box when clicked on.
So:
clicking on the white box makes it disappear into the black box
clicking on the black box makes it disappear into the white box
clicking on the white box makes it disappear into the black box
And so on...
My idea was to obtain the effect by modifying the z-index of the boxes when clicked on, using the utility classes u-on-top and u-at-bottom (eg the black box is brought to the top after the white box disappears), but I got some weird results.
You can try to adjust some transition, the trick is to add a delay to z-index so it changes after the scale effect. I have also change the JS code and reduced the CSS:
var btnW = document.querySelector(".white");
var btnB = document.querySelector(".black");
var btnState = false;
btnW.addEventListener("click", () => {
btnB.classList.remove('hide');
btnW.classList.add('hide');
btnW.classList.remove('u-on-top');
btnB.classList.add('u-on-top');
})
btnB.addEventListener("click", () => {
btnW.classList.remove('hide');
btnB.classList.add('hide');
btnB.classList.remove('u-on-top');
btnW.classList.add('u-on-top');
})
.button {
width: 100px;
height: 100px;
margin: 10px;
position: relative;
display: inline-block;
cursor: pointer;
}
.button>div {
width: 100%;
height: 100%;
border: 1px solid #000;
position: absolute;
transition: transform 0s, z-index 0s 0.5s;
z-index:0;
}
.button .white {
background: #fff;
}
.button .black {
background: #000;
}
.button>div.hide {
transform:scale(0);
transition: transform .5s, z-index 0s 0.5s;
}
.button>div.u-on-top {
z-index:1;
}
<div class="button">
<div class="white u-on-top"></div>
<div class="black"></div>
</div>
Related
I have no idea how to ask this question, but here's problem:
I have this kind of search bar ^ and when you double click on it it shrinks and input is disappearing (display: none). But when it disappears
And I-beam cursor shows. So I can't click or double click on it anymore (for some reason)
I tried input.blur(); but because it's not focused it didn't work. I have no clue what to google to fixed. I tried some but there weren't any related answers.
HTML:
<div class="search-field">
<input placeholder="Search" type="text">
<img src="search.svg" title="Double Click to toggle">
<img src="grip-lines.svg" alt="||" id="drag">
</div>
I use keyframes so I will how CSS too: (Edit: I will put more about css)
.search-field {
position: absolute;
width: 385px;
width: 20%;
background-color: #FFFFFF;
top: 15px;
left: 8%;
display: flex;
align-items: center;
justify-content: space-evenly;
padding: 5px;
border-radius: 10px;
border: 1px black solid;
}
input {
height: 80%;
width: 300px;
outline: none;
transition: .3s;
border-radius: 10px;
border: 1px black solid;
padding: 3px 5px;
background-color: #E4E9F7;
}
#keyframes openSearch {
0% {
width: 77px;
}
100% {
width: 385px;
}
}
#keyframes closeSearch {
0% {
width: 385px;
}
100% {
width: 77px;
}
}
.openedSearch {
animation: openSearch 0.5s both;
}
.closedSearch {
animation: closeSearch 0.5s both;
}
JS:
let searchState = true
let toggleSearchState = () => {
searchState = !searchState
if (searchState == true) {
searchField.className = 'search-field openedSearch'
input.style.display = 'block'
} else {
searchField.className = 'search-field closedSearch'
input.style.display = 'none'
}
}
searchBtn.addEventListener('dblclick', toggleSearchState)
Since everything seems to be working fine on this fiddle. The only thing left (that I couldn't test) is the SVG images and any code you attached to them.
As the id of the pipe image is drag, I am assuming you have attached a drag event on it. Also, if the size of the image is not set you may be overlapping, covering the entire search-field when the width is set too 77px.
An easy solution would be to set the height and width of the img tag with the draggable event, so you can be sure it is not overlapping.
In mobile, I'm trying to create a toggle that appears on top of an image, that when tapped on, makes text appear on top of the image too.
I basically want to recreate how The Guardian newspaper handles the little (i) icon in the bottom right corner on mobile.
And on desktop, the the text is there by default under the image and the (i) icon is gone.
So far I've managed to find a similar solution elsewhere online but it's not quite working right as I need it to.
function toggleText() {
var text = document.getElementById("demo");
if (text.style.display === "none") {
text.style.display = "block";
} else {
text.style.display = "none";
}
}
#blog {
width: 100%;
}
#blog figure {
position: relative;
}
#blog figure figcaption {
display: none;
position: absolute;
bottom: 0;
left: 0;
box-sizing: border-box;
width: 100%;
color: black;
text-align: left;
background: rgba(0, 0, 0, 0.5);
}
#blog figure button {
position: absolute;
bottom: 0;
right: 0;
color: black;
border: 5px solid black;
}
<div id="blog">
<figure>
<img src="https://cdn2.hubspot.net/hubfs/4635813/marble-around-the-world.jpg" alt="A photo of a slab of marble for example">
<figcaption id="demo" style='display: none'>A photo of a slab of marble for example</figcaption>
<button type='button' onclick="toggleText()">(i)</button>
</figure>
</div>
Don't use IDs. Your code should be reusable!
Don't use inline JS on* handlers, use Element.addEventListener() instead
Don't use inline style attributes.
Don't use el.style.display === "something" to check for display styles. Use Element.classList.toggle() instead
This straightforward example uses JavaScript to simply toggle a className "is-active" on the button's parent, the figure Element.
Everything else (icon symbol change, caption animation etc...) is handled purely by CSS:
document.querySelectorAll("figure button").forEach(EL_btn => {
EL_btn.addEventListener("click", () => {
EL_btn.closest("figure").classList.toggle("is-active");
});
});
/* QuickReset */ * {margin: 0; box-sizing: border-box;}
img {
max-width: 100%; /* Never extend images more than available */
}
figure {
position: relative;
overflow: hidden; /* overflow hidden to allow figcaption hide bottom */
}
figure img {
display: block; /* prevent "bottom space" caused by inline elements */
}
figure figcaption {
position: absolute;
width: 100%;
bottom: 0;
padding: 1rem;
padding-right: 4rem; /* Prevent text going under the button icon */
color: #fff;
background: rgba(0, 0, 0, 0.5);
transform: translateY(100%); /* Move down, out of view */
transition: transform 0.3s; /* Add some transition animation */
}
figure.is-active figcaption {
transform: translateY(0%); /* Move into view */
}
figure button {
position: absolute;
width: 2rem;
height: 2rem;
bottom: 0.5rem;
right: 0.5rem;
border-radius: 50%;
color: #fff;
background: rgba(0, 0, 0, 0.5);
border: 0;
cursor: pointer;
}
figure button::before {
content: "\2139"; /* i icon */
}
figure.is-active button::before {
content: "\2A09"; /* x icon */
}
<figure>
<img src="https://cdn2.hubspot.net/hubfs/4635813/marble-around-the-world.jpg" alt="A photo of a slab of marble for example">
<figcaption>A photo of a slab of marble for example</figcaption>
<button type="button"></button>
</figure>
The above will work for any number of such elements on your website without the need to add any more CSS or JS.
I see a couple things that could mess this up, one is the fact that there is nothing to make your image adjust to your mobile screen, more-over there is also margin that is there by default, so I suggest these changes to the CSS:
First I'd set box-sizing to border-box and margin to 0, this should be a regular practice by the way.
*{
box-sizing: border-box;
margin: 0;
}
Then select the image and make it adjust to your page as such
#blog figure img{
height: auto;
width:100%;
}
Finally, for some styling you can add some padding to your blog div to make the image slightly smaller on your screen
#blog {
width: 100%;
padding: 35px;
}
This is the Fiddle for it.
I have a small carousel that plays automatically on page load, using HTML, CSS and JavaScript and definitely no jQuery.
To add a pause/play option there is a span with role="checkbox" followed by a label.
The label itself is hidden and has no content. The span has two pseudo elements. On first showing, the pseudo element shows the ⏸ character, controlled by a CSS ::after class. When clicked, the span has the class "is-clicked" added, at which point the ▶ character is displayed, controlled by another ::after class
It is focusable and can be activated with the keyboard by hitting the Enter key, but when I check with Lighthouse, I keep getting the "Focusable elements should have interactive semantics".
Why is this?
Here is the code:
/* detect keyboard users */
function handleFirstTab(e) {
if (e.key === 'Tab') { // the 'I am a keyboard user' key
document.body.classList.add('user-is-tabbing');
window.removeEventListener('keydown', handleFirstTab);
}
}
let checkboxEl = document.getElementById('checkbox');
let labelEl = document.getElementById('checkboxLabel');
labelEl.onclick = function handleLabelClick() {
checkboxEl.focus();
toggleCheckbox();
}
function toggleCheckbox() {
let isChecked = checkboxEl.classList.contains('is-checked');
checkboxEl.classList.toggle('is-checked', !isChecked);
checkboxEl.setAttribute('aria-checked', !isChecked);
}
checkboxEl.onclick = function handleClick() {
toggleCheckbox();
}
checkboxEl.onkeypress = function handleKeyPress(event) {
let isEnterOrSpace = event.keyCode === 32 || event.keyCode === 13;
if(isEnterOrSpace) {
toggleCheckbox();
}
}
.link {
height: auto;
border: 1px solid #000;
margin-bottom: 1rem;
width: 80%;
display: block;
}
#carousel-checkbox {
margin-bottom: 1rem;
height: 50px;
width: 100px;
display: inline-block;
}
#carousel-checkbox input {
display: none;
}
#carousel-checkbox label {
display: inline-block;
vertical-align: middle;
}
#carousel-checkbox #checkbox {
position: relative;
top: 0;
left: 30px;
padding: 0.5rem 1rem;
background: rgba(255,255,255, 0.5);
}
#carousel-checkbox #checkbox:hover {
cursor: pointer;
}
#carousel-checkbox #checkbox:focus {
border: 1px dotted var(--medium-grey);
}
#carousel-checkbox #checkbox::after {
content: "⏸";
font-size: 1.5rem;
color: var(--theme-dark);
}
#carousel-checkbox #checkbox.is-checked::after {
content: "▶";
}
<div class="link">A bit of text with a dummy link to demonstrate the keyboard tabbing navigation. </div>
<div id="carousel-checkbox"><span id="checkbox" tabindex="0" role="checkbox" aria-checked="false" aria-labelledby="checkboxLabel"></span><label id="checkboxLabel"></label></div>
<div class="link">Another link to another dummy link</div>
Why is this? Is it because the pseudo elements don't have a name attribute or something like that?
I have tried a different way, by dropping the pseudo elements and trying to change the span innerHTML depending on whether the class 'is-clicked' exists or not, but although I can get the pause character to display initially, it won't change the innerHTML to the play character when the span is clicked again.
Short Answer
This is a warning rather than an error, it is telling you to check that the item actually is interactive.
Now you have got the interactivity on the element so you can ignore that issue.
Long answer
Why not just use a <input type="checkbox"> and save yourself an awful lot of extra work?
You can hide a checkbox with a visually hidden class.
This then allows you to do the same trick with a pseudo element as the visual representation of the state.
I have made several changes to your example that mean you don't have to worry about capturing keypresses etc. and can just use a click handler so your JS is far simpler.
Notice the trick with the label where I add some visually hidden text within it so the label is still visible (so we can still use psuedo elements!).
I then use #checkbox1 ~ label to access the label with CSS so we can change the state.
The final thing to notice is how I changed the content property slightly. This is because some screen readers will try and read out pseudo elements so I added alt text that was blank. Support isn't great at just over 70%, but it is worth adding for browsers that do support it.
Example
The below hopefully illustrates a way of achieving what you want with a checkbox.
There may be a few errors as I just adapted your code so please do not just copy and paste!
note: a checkbox should not work with Enter, only with Space. If you want it to work with both it should instead be a toggle switch etc. so that would be a completely different pattern.
let checkboxEl = document.getElementById('checkbox1');
let labelEl = document.querySelector('#checkboxLabel');
function toggleCheckbox() {
let isChecked = checkboxEl.classList.contains('is-checked');
checkboxEl.classList.toggle('is-checked', !isChecked);
checkboxEl.setAttribute('aria-checked', !isChecked);
}
checkboxEl.onclick = function handleClick() {
toggleCheckbox();
}
.link {
height: auto;
border: 1px solid #000;
margin-bottom: 1rem;
width: 80%;
display: block;
}
#carousel-checkbox {
margin-bottom: 1rem;
height: 50px;
width: 100px;
display: inline-block;
}
.visually-hidden {
border: 0;
padding: 0;
margin: 0;
position: absolute !important;
height: 1px;
width: 1px;
overflow: hidden;
clip: rect(1px 1px 1px 1px); /* IE6, IE7 - a 0 height clip, off to the bottom right of the visible 1px box */
clip: rect(1px, 1px, 1px, 1px); /*maybe deprecated but we need to support legacy browsers */
clip-path: inset(50%); /*modern browsers, clip-path works inwards from each corner*/
white-space: nowrap; /* added line to stop words getting smushed together (as they go onto seperate lines and some screen readers do not understand line feeds as a space */
}
#carousel-checkbox label {
display: inline-block;
vertical-align: middle;
}
#carousel-checkbox #checkbox1 {
position: relative;
top: 0;
left: 30px;
padding: 0.5rem 1rem;
background: rgba(255,255,255, 0.5);
}
#carousel-checkbox #checkbox1 ~label:hover {
cursor: pointer;
}
#carousel-checkbox #checkbox1:focus ~ label {
border: 1px dotted #333;
}
#carousel-checkbox #checkbox1 ~label::after {
content: "⏸" / "";
font-size: 1.5rem;
color: #000;
}
#carousel-checkbox #checkbox1.is-checked ~label::after {
content: "▶" / "";
}
<div class="link">A bit of text with a dummy link to demonstrate the keyboard tabbing navigation. </div>
<div id="carousel-checkbox">
<input type="checkbox" id="checkbox1" class="visually-hidden">
<label for="checkbox1" id="checkboxLabel">
<span class="visually-hidden">Pause animations</span>
</label>
</div>
<div class="link">Another link to another dummy link</div>
In the end, I gave up on using a checkbox, due to the difficulties with iPad/iOS not responding to checkbox events. Whilst it worked in codepen on iOS it wouldn't work on the actual site. So I switched to a button.
Here is the code, which is fully accessible with no 'interactive semantics' warnings, shown with some dummy slides. The animation is based on having only three slides. If you wanted more or less, then the timings would have to be adjusted accordingly. All I need now is to style the pause button.
let element = document.getElementById("pause");
function toggleButton() {
element.classList.toggle("paused");
if (element.innerHTML === "⏸") {
element.innerHTML = "▶";
}
else {
element.innerHTML = "⏸";
}
}
element.onclick = function handleClick() {
toggleButton();
}
#carousel {
height: auto;
max-width: 1040px;
position: relative;
margin: 4rem auto 0;
}
#carousel > * {
animation: 12s autoplay6 infinite linear;
position: absolute;
top: 0;
left: 0;
opacity: 0.0;
}
#carousel .one {
position: relative;
}
.homeSlides {
height: 150px;
width: 400px;
background-color: #ff0000;
}
.homeSlides.two {
background-color: #0fff00;
}
.homeSlides.three {
background-color: #e7e7e7;
}
#keyframes autoplay6 {
0% {opacity: 0.0}
4% {opacity: 1.0}
33.33% {opacity: 1.0}
37.33% {opacity: 0.0}
100% {opacity: 0.0}
}
#carousel > *:nth-child(1) {
animation-delay: 0s;
}
#carousel > *:nth-child(2) {
animation-delay: 4s;
}
#carousel > *:nth-child(3) {
animation-delay: 8s;
}
#carousel-button {
position: relative;
height: 100%;
width: auto;
}
#carousel-button button {
position: absolute;
top: -3.5rem;
right: 5rem;
padding: 0 0.5rem 0.25rem;;
background: #fff;
z-index: 98;
font-size: 2rem;
cursor: pointer;
}
body.user-is-tabbing #carousel-button button:focus {
outline: 1px dotted #333;
}
body:not(.user-is-tabbing) #carousel-button button:focus {
outline: none;
}
#carousel-button button:hover {
cursor: pointer;
}
#carousel-button ~ #carousel * {
animation-play-state: running;
}
#carousel-button button.paused ~ #carousel * {
animation-play-state: paused;
}
<div id="carousel-button"><button id="pause" class="">⏸</button>
<div id="carousel">
<div class="homeSlides one">This is div one</div>
<div class="homeSlides two">This is div two</div>
<div class="homeSlides three">This is div three</div>
</div>
</div>
Is there a way to have a smooth transition between two states of an element if javascript is selector is used? For example, I have an element with the class of click__box and the id of clickBox. I can set the opacity from 0 to 1 when the button is clicked by using JS. The problem is that transition property has no effect at all. I know that it can be used something like the checkbox hack with pure css but i would like to know if there is a way of doing this with JavaScript.
//CSS
.click__box {
width:100%;
height:100%;
opacity:0;
transition:all .5s;
}
//JS
const collectionButton = document.querySelector("#collectionButton")
var clickBoxStyle = document.getElementById("clickBox").style
collectionButton.addEventListener('click', (e) => {
clickBoxStyle.opacity = "1"
})
It works well.
const collectionButton = document.querySelector("#collectionButton")
var clickBoxStyle = document.getElementById("clickBox").style
collectionButton.addEventListener('click', (e) => {
clickBoxStyle.opacity = "1"
})
.click__box {
width: 100%;
height: 100%;
opacity: 0;
transition: all .5s;
background-color: GREEN;
}
#collectionButton {
width: 150px;
height: 50px;
background-color: red;
cursor: pointer;
}
.container {
position: relative;
width: 150px;
height: 200px;
background-color: blue;
cursor: pointer;
}
<div id="collectionButton">
collectionButton click me
</div>
<div class="container">
Click Box Container
<div id="clickBox" class="click__box">
Click Box
</div>
</div>
Demo for you pal https://codepen.io/init1/pen/mddKgyw
I'm not really asking for help with my code, I'm more asking, how do you do this?
When you click my div, the screen goes black, but I want my div underneath to still show as normal, but the rest of the area to be blacked out.
function lightsout() {
document.getElementById("lightsout").style.visibility = "visible";
}
<div style="width:100px;height:100px;border:2px solid blue" onclick="lightsout()">Click Me</div>
<div id="lightsout" style="position:fixed;top:0;left:0;width:100%;height:100%;background-color:black;visibility:hidden;">
You can use the box-shadow property to achieve this effect.
Updated the Code
function lightsout() {
document.getElementById("maindiv").classList.toggle("visible");
}
.visible{
box-shadow: 0 0 0 10000px #000;
position: relative;
}
body{
color: red;
}
<div style="width:100px;height:100px;border:2px solid blue; color: #000;" onclick="lightsout()" id="maindiv">Click Me</div>
Other elements on the page will be hidden...
You can simply add z-indexes to your positioning. With giving the black area a lower z-index than your button but a higher z-index than the rest, you will have your effect.
Also it is recommended to not use inline styles, as your code becomes way more maintainable with styles and markup seperate.
function lightsout() {
document.getElementById("lightsout").classList.toggle("visible");
}
.button {
position: relative;
z-index: 10;
width: 100px;
height: 100px;
border: 2px solid blue;
background: white;
}
#lightsout {
position: fixed;
z-index: 5;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: gray;
visibility: hidden;
}
#lightsout.visible {
visibility: visible
}
<div class="button" onclick="lightsout()">Click Me</div>
<div id="lightsout"></div>
Other elements are hidden.
you can use css,
z-index, and add divbox background-color like this :)
function lightsout() {
document.getElementById("lightsout").style.visibility = "visible";
}
#lightsout{
z-index: -1
}
<div style="width:100px;height:100px;border:2px solid blue;background-color:white;" onclick="lightsout()">Click Me</div>
<div id="lightsout" style="position:fixed;top:0;left:0;width:100%;height:100%;background-color:black;visibility:hidden;">http://stackoverflow.com/questions/42688925/how-to-make-a-page-lights-out-except-for-one-element#