I want to make a button for night and day mode.I found this link but it doesn't work for me.
when i click the button, it applies css to change background and text color and button value which is night to day but if i click button again it doesn't work. it keeps execute "if" part not "else" part.
//nightmode
var mode = localStorage.getItem("mode");
if (mode != null) {
document.getElementById("body").classList.add(mode);
}
document.getElementById("nightButton").onclick = function() {
var nightButton = document.getElementById("nightButton")
var body = document.getElementById("body");
if (nightButton.value = "night") {
body.classList.add("nightMode");
nightButton.value = "day";
localStorage.setItem('mode', 'nightMode');
} else {
body.classList.remove("nightMode");
nightButton.value = "night";
localStorage.setItem("mode", null);
}
};
.nightMode {
background-color: black;
color: white;
}
<body id="body">
<input type="button" value="night" id="nightButton">
<div>abcd</div>
</body>
Just change the line
if (nightButton.value = "night") {
to
if (nightButton.value == "night") {
You can simplify the mode button handler. This snippet including handling of localStorage (can't be used in SO-snippets) can be found #JsFiddle
document.addEventListener("click", evt => {
if (evt.target.id === "nightButton") {
const body = document.body;
body.classList.toggle("nightMode");
evt.target.value = `set ${
body.classList.contains("nightMode") ? "day" : "night"}`;
document.querySelector("#currentMode").textContent = `Current mode: ${
body.classList.contains("nightMode") ? "NIGHT" : "DAY"}`;
}
});
.nightMode {
background-color: black;
color: white;
}
body {
margin: 2rem;
}
#currentMode {
margin-top: 1rem;
}
<div>abcd
<input type="button" value="set night" id="nightButton">
</div>
<div id="currentMode"></div>
there is a little error in your code.
This code: if (nightButton.value = "night") {
Can you change it: if (nightButton.value == "night") {
Example here: https://codepen.io/yasgo/pen/OJRLErL
thank you all
I don't know if this is good codes but i tried this and it works ...
var mode = localStorage.getItem("mode");
document.getElementById("body").classList.add(mode);
if (mode == "nightMode") {
document.getElementById("nightButton").value = "day"
} else {
document.getElementById("nightButton").value = "night"
}
document.getElementById("nightButton").onclick = function () {
var nightButton = document.getElementById("nightButton")
var body = document.getElementById("body");
if (nightButton.value == "night") {
body.classList.add("nightMode");
nightButton.value = "day";
localStorage.setItem('mode', 'nightMode');
} else {
body.classList.remove("nightMode");
nightButton.value = "night";
localStorage.setItem("mode", "daymode");
}
};
Related
I want do have a basic Darkmode linked to a key press. I'am a Beginner in JavaScript and i cannot get it to work. I want it like, you press a key, the Darkmode turns on with a Cookie over js-cookie, and I press the same Key again to turn off the Darkmode and delete the cookie. Can anybody help me?
There is my Code:
var elem = document.getElementById("folie");
window.addEventListener("keydown", checkKeyPress);
function checkKeyPress(key) {
let zahl = 1;
if (key.keyCode == "70") {
if (zahl == 1) {
zahl++
dark()
Cookies.set("Darkmode", "An");
}
if (zahl == 2) {
zahl--
Cookies.remove("Darkmode")
}
}
}
var DarkCookie = Cookies.get("Darkmode");
if (DarkCookie == 'An') {
dark();
}
function dark() {
var element = document.body;
element.classList.toggle("dark-mode");
}
Edit:
Ok i've got it:
let CookieDarkMode = false;
function toggleDarkMode() {
var element = document.body;
element.classList.toggle("dark-mode");
}
window.addEventListener("keydown", checkKeyPress);
function checkKeyPress(key) {
if (key.keyCode === 70) { //"F" has been pressed
CookieDarkMode = !CookieDarkMode;
console.log("Cookie Dark mode: " + CookieDarkMode);
toggleDarkMode();
if (CookieDarkMode) {
Cookies.set("Darkmode", "An");
}else {
Cookies.remove("Darkmode");
}
}
};
var DarkCookie = Cookies.get("Darkmode")
if (DarkCookie == 'An') {
CookieDarkMode = true;
toggleDarkMode();
}
You don't have to store a number. You can just get the previous cookie value with a boolean
let CookieDarkMode = false;
function toggleDarkMode() {
var element = document.body;
element.classList.toggle("dark-mode");
}
window.addEventListener("keydown", checkKeyPress);
function checkKeyPress(key) {
if (key.keyCode === 70) { //"F" has been pressed
CookieDarkMode = !CookieDarkMode;
console.log("Cookie Dark mode: " + CookieDarkMode);
toggleDarkMode();
}
};
body {
background-color: ghostwhite;
}
.dark-mode {
background-color: black;
color: white;
}
<body>
<p>Lorem Ipsum</p>
</body>
your problem is on your checkKeyPress function, you always check for the zahl value, but it will always start as 1.
for demostration purposes you are doing this basically:
function sum(){
let zahl = 1;
zahl++
console.log(zahl)
}
// you will never see a 3, because you are creating `zhl`
// in each call with a value of 1
sum();
sum();
sum();
sum();
therefore, each time you check for the zahl variable, it will be 1 and will always enter the if that turns on the darkmode.
the solution for your code would be to move the zahl variable outside the function scope:
let zahl = 1; // outside the function scope
var elem = document.getElementById("folie");
window.addEventListener("keydown", checkKeyPress);
function checkKeyPress(key) {
if (key.keyCode == "70") {
if (zahl == 1) {
zahl++
dark()
Cookies.set("Darkmode", "An");
}else if (zahl == 2) {
zahl--
Cookies.remove("Darkmode")
dark(); //you should call dark here as well to toggle to the other mode.
}
}
}
var DarkCookie = Cookies.get("Darkmode");
if (DarkCookie == 'An') {
dark();
}
function dark() {
var element = document.body;
element.classList.toggle("dark-mode");
}
note: it doesn't look like the best implementation, it would be easier to read if you use a boolean for the state of the mode or if you want multiple types, you can use the name as a key for each of the modes.
I'm trying to create a basic video chat using RTCMultiConnection Webrtc.
The code works fine in Safari browser but it always fails to show the joiners videos in a simple ios phonegap app. so basically no one can see others videos.
I added iosrtc plugin to my app as well...
Spent days trying to find the issue and I think I am getting close.
I found out that the event.type is always local for everyone.
So, the event.type is never remote for anyone that uses the app.
But when i test the same code in safari browser, the first joiner event.type is local and the rest of the joiners event.type is remote and thats why it works fine in the browser.
Now that I found the issue (sort of), I need to know why this is happening in the phonegap app and how to eradicate it.
This is my entire code, you can run this code directly in your browser as is and it will work fine:
Javascript:
// ......................................................
// .......................UI Code........................
// ......................................................
document.getElementById('open-room').onclick = function() {
disableInputButtons();
connection.open(document.getElementById('room-id').value, function(isRoomOpened, roomid, error) {
if(isRoomOpened === true) {
showRoomURL(connection.sessionid);
}
else {
disableInputButtons(true);
if(error === 'Room not available') {
alert('Someone already created this room. Please either join or create a separate room.');
return;
}
alert(error);
}
});
};
document.getElementById('join-room').onclick = function() {
disableInputButtons();
connection.join(document.getElementById('room-id').value, function(isJoinedRoom, roomid, error) {
if (error) {
disableInputButtons(true);
if(error === 'Room not available') {
alert('This room does not exist. Please either create it or wait for moderator to enter in the room.');
return;
}
alert(error);
}
});
};
document.getElementById('open-or-join-room').onclick = function() {
disableInputButtons();
connection.openOrJoin(document.getElementById('room-id').value, function(isRoomExist, roomid, error) {
if(error) {
disableInputButtons(true);
alert(error);
}
else if (connection.isInitiator === true) {
// if room doesn't exist, it means that current user will create the room
showRoomURL(roomid);
}
});
};
// ......................................................
// ..................RTCMultiConnection Code.............
// ......................................................
var connection = new RTCMultiConnection();
// by default, socket.io server is assumed to be deployed on your own URL
//connection.socketURL = '/';
// comment-out below line if you do not have your own socket.io server
connection.socketURL = 'https://rtcmulticonnection.herokuapp.com:443/';
connection.socketMessageEvent = 'video-conference-demo';
connection.session = {
audio: true,
video: true
};
connection.sdpConstraints.mandatory = {
OfferToReceiveAudio: true,
OfferToReceiveVideo: true
};
connection.videosContainer = document.getElementById('videos-container');
connection.onstream = function(event) {
var video = document.createElement('video');
if(event.type === 'local') {
video.setAttribute('class', 'myvideo');
//$('.yourVideo').attr('src', event.stream);
//$('.yourVideo').attr('id', event.streamid);
//alert('local');
/*video.volume = 0;
try {
video.setAttributeNode(document.createAttribute('muted'));
} catch (e) {
video.setAttribute('muted', true);
}*/
}
if (event.type === 'remote') {
alert('remote');
video.setAttribute('class', 'othersvideo');
}
//video.src = URL.createObjectURL(event.stream);
setTimeout(function() {
var existing = document.getElementById(event.streamid);
if(existing && existing.parentNode) {
existing.parentNode.removeChild(existing);
}
event.mediaElement.removeAttribute('src');
event.mediaElement.removeAttribute('srcObject');
event.mediaElement.muted = true;
event.mediaElement.volume = 0;
try {
video.setAttributeNode(document.createAttribute('autoplay'));
video.setAttributeNode(document.createAttribute('playsinline'));
} catch (e) {
video.setAttribute('autoplay', true);
video.setAttribute('playsinline', true);
}
console.log(JSON.stringify(event));
video.srcObject = event.stream;
var width = parseInt(connection.videosContainer.clientWidth / 3) - 20;
var width = $(document).width();
var height = $(document).height();
var mediaElement = getHTMLMediaElement(video, {
/*title: event.userid,*/
buttons: ['full-screen'],
width: width,
showOnMouseEnter: false
});
connection.videosContainer.appendChild(mediaElement);
mediaElement.media.play();
var isInitiator = connection.isInitiator;
if (isInitiator === true && event.type === 'local') {
// initiator's own stream
alert('you are initiator');
}else{
alert('you are remote');
}
mediaElement.id = event.streamid;
//video.play();
}, 5000);
};
var recordingStatus = document.getElementById('recording-status');
var chkRecordConference = document.getElementById('record-entire-conference');
var btnStopRecording = document.getElementById('btn-stop-recording');
btnStopRecording.onclick = function() {
var recorder = connection.recorder;
if(!recorder) return alert('No recorder found.');
recorder.stopRecording(function() {
var blob = recorder.getBlob();
invokeSaveAsDialog(blob);
connection.recorder = null;
btnStopRecording.style.display = 'none';
recordingStatus.style.display = 'none';
chkRecordConference.parentNode.style.display = 'inline-block';
});
};
connection.onstreamended = function(event) {
var mediaElement = document.getElementById(event.streamid);
if (mediaElement) {
mediaElement.parentNode.removeChild(mediaElement);
}
};
connection.onMediaError = function(e) {
if (e.message === 'Concurrent mic process limit.') {
if (DetectRTC.audioInputDevices.length <= 1) {
alert('Please select external microphone. Check github issue number 483.');
return;
}
var secondaryMic = DetectRTC.audioInputDevices[1].deviceId;
connection.mediaConstraints.audio = {
deviceId: secondaryMic
};
connection.join(connection.sessionid);
}
};
// ..................................
// ALL below scripts are redundant!!!
// ..................................
function disableInputButtons(enable) {
document.getElementById('room-id').onkeyup();
document.getElementById('open-or-join-room').disabled = !enable;
document.getElementById('open-room').disabled = !enable;
document.getElementById('join-room').disabled = !enable;
document.getElementById('room-id').disabled = !enable;
}
// ......................................................
// ......................Handling Room-ID................
// ......................................................
function showRoomURL(roomid) {
var roomHashURL = '#' + roomid;
var roomQueryStringURL = '?roomid=' + roomid;
var html = '<h2>Unique URL for your room:</h2><br>';
html += 'Hash URL: ' + roomHashURL + '';
html += '<br>';
html += 'QueryString URL: ' + roomQueryStringURL + '';
var roomURLsDiv = document.getElementById('room-urls');
roomURLsDiv.innerHTML = html;
roomURLsDiv.style.display = 'block';
}
(function() {
var params = {},
r = /([^&=]+)=?([^&]*)/g;
function d(s) {
return decodeURIComponent(s.replace(/\+/g, ' '));
}
var match, search = window.location.search;
while (match = r.exec(search.substring(1)))
params[d(match[1])] = d(match[2]);
window.params = params;
})();
var roomid = '';
if (localStorage.getItem(connection.socketMessageEvent)) {
roomid = localStorage.getItem(connection.socketMessageEvent);
} else {
roomid = connection.token();
}
var txtRoomId = document.getElementById('room-id');
txtRoomId.value = roomid;
txtRoomId.onkeyup = txtRoomId.oninput = txtRoomId.onpaste = function() {
localStorage.setItem(connection.socketMessageEvent, document.getElementById('room-id').value);
};
var hashString = location.hash.replace('#', '');
if (hashString.length && hashString.indexOf('comment-') == 0) {
hashString = '';
}
var roomid = params.roomid;
if (!roomid && hashString.length) {
roomid = hashString;
}
if (roomid && roomid.length) {
document.getElementById('room-id').value = roomid;
localStorage.setItem(connection.socketMessageEvent, roomid);
// auto-join-room
(function reCheckRoomPresence() {
connection.checkPresence(roomid, function(isRoomExist) {
if (isRoomExist) {
connection.join(roomid);
return;
}
setTimeout(reCheckRoomPresence, 5000);
});
})();
disableInputButtons();
}
// detect 2G
if(navigator.connection &&
navigator.connection.type === 'cellular' &&
navigator.connection.downlinkMax <= 0.115) {
alert('2G is not supported. Please use a better internet service.');
}
$(document).on('click', '.mybtn', function() {
window.cordova.InAppBrowser.open(" https://vps267717.ovh.net/webrtc", "_blank", "location=no,toolbar=yes");
});
HTML:
<!-- Demo version: 2019.01.09 -->
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>Video Conferencing using RTCMultiConnection</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0">
<script>
setTimeout(function() {
navigator.splashscreen.hide();
}, 4000);
// alert dialog dismissed
function alertDismissed() {
}
</script>
<link rel="stylesheet" href="https://rtcmulticonnection.herokuapp.com/demos/stylesheet.css">
<script src="https://rtcmulticonnection.herokuapp.com/demos/menu.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://rtcmulticonnection.herokuapp.com/dist/RTCMultiConnection.min.js"></script>
<script src="https://rtcmulticonnection.herokuapp.com/node_modules/webrtc-adapter/out/adapter.js"></script>
<script src="https://rtcmulticonnection.herokuapp.com/socket.io/socket.io.js"></script>
<!-- custom layout for HTML5 audio/video elements -->
<link rel="stylesheet" href="https://rtcmulticonnection.herokuapp.com/dev/getHTMLMediaElement.css">
<script src="https://rtcmulticonnection.herokuapp.com/dev/getHTMLMediaElement.js"></script>
<script src="https://rtcmulticonnection.herokuapp.com/node_modules/recordrtc/RecordRTC.js"></script>
<script src="cordova.js"></script>
<script src="ios-websocket-hack.js"></script>
<style>
/* .myvideo{
width:100px !important;
height:100px !important;
background:#ccc;
position:absolute;
top:0;
left:0;
z-index:10;
}
.othersvideo{
width:100% !important;
height:100% !important;
background:#ccc;
position:absolute;
top:0;
left:0;
z-index:0;
}*/
* {
word-wrap:break-word;
}
video {
object-fit: fill;
width: 30%;
}
button,
input,
select {
font-weight: normal;
padding: 2px 4px;
text-decoration: none;
display: inline-block;
text-shadow: none;
font-size: 16px;
outline: none;
}
.make-center {
text-align: center;
padding: 5px 10px;
}
img, input, textarea {
max-width: 100%
}
#media all and (max-width: 500px) {
.fork-left, .fork-right, .github-stargazers {
display: none;
}
}
</style>
</head>
<body>
<button class="mybtn" >click me now</button>
<section class="make-center">
<div>
<label><input type="checkbox" id="record-entire-conference"> Record Entire Conference In The Browser?</label>
<span id="recording-status" style="display: none;"></span>
<button id="btn-stop-recording" style="display: none;">Stop Recording</button>
<br><br>
<input type="text" id="room-id" value="abcdef" autocorrect=off autocapitalize=off size=20>
<button id="open-room">Open Room</button>
<button id="join-room">Join Room</button>
<button id="open-or-join-room">Auto Open Or Join Room</button>
</div>
<div id="videos-container" style="margin: 20px 0;"></div>
<div id="room-urls" style="text-align: center;display: none;background: #F1EDED;margin: 15px -10px;border: 1px solid rgb(189, 189, 189);border-left: 0;border-right: 0;"></div>
</section>
<script src="https://cdn.webrtc-experiment.com/common.js"></script>
</body>
</html>
Any help would be greately appreciated.
Thanks in advance.
I was wondering how it is possible to make the button undo something too after clicking it. In my scenario just simple formatting of Text(Color,size etc), when you first click it, it formats the text as described in Javascript, but I would like to add a function, that when you click it again, that it undoes that.
`<script>
function myFunction(){
document.getElementById("demo").style.fontsize="25px";
document.getElementById("demo").style.color="#3AF702";
document.getElementById("demo").style.backgroundcolor="red";
}
</script>`
<button type="change" onclick="myFunction()">Change!</button>
I checked other articles already, which seemed to be related, but I did not get any smarter out of those, so my apologies in advance if it is a dup and thanks for your help!
<script>
var flag = true;
function myFunction(){
let el = document.getElementById("demo");
el.style.fontsize = flag ? "25px" : "";
el.style.color= flag ? "#3AF702" : "";
el.style.backgroundcolor=flag ? "red" : "";
flag = !flag;
}
</script>`
<button type="change" onclick="myFunction()">Change!</button>
The easiest way to do this is to add and remove a class
<style>
.change {
font-size: 25px;
color: #3AF702;
background-color="red"
}
</style>
<script>
var x = 0;
function myFunction() {
if (x == 0) {
document.getElementById("demo").classList.add("change");
x = 1;
} else {
document.getElementById("demo").classList.remove("change");
x = 0;
}
}
</script>
<button type="change" onclick="myFunction()">Change!</button>
Create an object that stores the initial values of your button and a variable which holds the state of it.
var state = 0;
var backup = {};
backup.fontSize = document.getElementById("demo").style.fontsize;
backup.color = document.getElementById("demo").style.color;
backup.background = document.getElementById("demo").style.backgroundcolor;
Now you can easily switch between the backup and the new values like this:
function myFunction() {
if (state == 0) {
document.getElementById("demo").style.fontsize = "25px";
document.getElementById("demo").style.color = "#3AF702";
document.getElementById("demo").style.backgroundcolor = "red";
state = 1;
} else {
document.getElementById("demo").style.fontsize = backup.fontSize;
document.getElementById("demo").style.color = backup.color;
document.getElementById("demo").style.backgroundcolor = backup.background;
state = 0;
}
}
var flag = true;
function myFunction(){
var x = document.getElementById("demo");
if (flag) {
x.style.backgroundColor = "red";
x.style.color="#3AF702";
x.style.fontSize="25px"
} else {
x.style.backgroundColor = "blue";
x.style.color="#dddddd";
x.style.fontSize="10px"
}
flag = !flag
}
function myFunction(){
demo.className = demo.className ? "" : "style"
}
.style {
font-size: 25px;
color: red;
background: blue;
}
<p id="demo">Hi!</p>
<button type="change" onclick="myFunction()">Change!</button>
im having problem, somehow my script if (myStringOld == myString) and if (regex.test(myString)) doesn't work on chrome, i cant figure it out why. myString and myStringOld is the date (format 2015-06-05) Can someone explain me or help to fix it. Because all the type it types else alert.
var myString = txtCellEditor.value;
var myStringOld = oldvalue.value;
if (myStringOld != myString) {
if (regex.test(myString)) {
document.getElementById('cellValueEditorDiv').style.display = 'none';
document.getElementById(cellId).style.border = 'none';
}
else {
alert("Bad date format. yyyy-mm-dd");
}
} else {
alert("You haven't changed the date.");
}
This one works perfectly in Chrome Version 44.0.2403.107 m:
HTML
<div id="cellValueEditorDiv">
<input id="txtCellEditor" value="2012-12-20" />
</div>
<button id="submit">Test it</button>
CSS:
div {
width: 200px;
padding: 12px;
background: white;
}
JavaScript/jQuery:
var oldvalue = "";
var regex = /^\d{4}([./-])\d{2}\1\d{2}$/;
$(document).ready(function () {
$('#submit').click(function () {
var myString = document.getElementById('txtCellEditor').value;
var myStringOld = oldvalue;
if (myStringOld != myString) {
if (regex.test(myString)) {
document.getElementById('cellValueEditorDiv').style.background = 'green';
//document.getElementById(cellId).style.border = 'none';
} else {
document.getElementById('cellValueEditorDiv').style.background = 'red';
alert("Blogas datos formatas arba blogai įvesta data. yyyy-mm-dd");
}
oldvalue = "";
} else {
alert("Nepakeitėte keičiamos datos.");
}
});
});
Try it out:
http://jsfiddle.net/1drygub7/3/
I have seen this jQuery syntax:
if($(element).is(':hover')) { do something}
Since I am not using jQuery, I am looking for the best way to do this in pure javascript.
I know I could keep a global variable and set/unset it using mouseover and mouseout, but I'm wondering if there is some way to inspect the element's native properties via the DOM instead? Maybe something like this:
if(element.style.className.hovered === true) {do something}
Also, it must be cross browser compatible.
Simply using element.matches(':hover') seems to work well for me, you can use a comprehensive polyfill for older browsers too: https://developer.mozilla.org/en-US/docs/Web/API/Element/matches
You can use querySelector for IE>=8:
const isHover = e => e.parentElement.querySelector(':hover') === e;
const myDiv = document.getElementById('mydiv');
document.addEventListener('mousemove', function checkHover() {
const hovered = isHover(myDiv);
if (hovered !== checkHover.hovered) {
console.log(hovered ? 'hovered' : 'not hovered');
checkHover.hovered = hovered;
}
});
.whyToCheckMe {position: absolute;left: 100px;top: 50px;}
<div id="mydiv">HoverMe
<div class="whyToCheckMe">Do I need to be checked too?</div>
</div>
to fallback I think it is ok #Kolink answer.
First you need to keep track of which elements are being hovered on. Here's one way of doing it:
(function() {
var matchfunc = null, prefixes = ["","ms","moz","webkit","o"], i, m;
for(i=0; i<prefixes.length; i++) {
m = prefixes[i]+(prefixes[i] ? "Matches" : "matches");
if( document.documentElement[m]) {matchfunc = m; break;}
m += "Selector";
if( document.documentElement[m]) {matchfunc = m; break;}
}
if( matchfunc) window.isHover = function(elem) {return elem[matchfunc](":hover");};
else {
window.onmouseover = function(e) {
e = e || window.event;
var t = e.srcElement || e.target;
while(t) {
t.hovering = true;
t = t.parentNode;
}
};
window.onmouseout = function(e) {
e = e || window.event;
var t = e.srcElement || e.target;
while(t) {
t.hovering = false;
t = t.parentNode;
}
};
window.isHover = function(elem) {return elem.hovering;};
}
})();
it occurred to me that one way to check if an element is being hovered over is to set an unused property in css :hover and then check if that property exists in javascript. its not a proper solution to the problem since it is not making use of a dom-native hover property, but it is the closest and most minimal solution i can think of.
<html>
<head>
<style type="text/css">
#hover_el
{
border: 0px solid blue;
height: 100px;
width: 100px;
background-color: blue;
}
#hover_el:hover
{
border: 0px dashed blue;
}
</style>
<script type='text/javascript'>
window.onload = function() {check_for_hover()};
function check_for_hover() {
var hover_element = document.getElementById('hover_el');
var hover_status = (getStyle(hover_element, 'border-style') === 'dashed') ? true : false;
document.getElementById('display').innerHTML = 'you are' + (hover_status ? '' : ' not') + ' hovering';
setTimeout(check_for_hover, 1000);
};
function getStyle(oElm, strCssRule) {
var strValue = "";
if(document.defaultView && document.defaultView.getComputedStyle) {
strValue = document.defaultView.getComputedStyle(oElm, "").getPropertyValue(strCssRule);
}
else if(oElm.currentStyle) {
strCssRule = strCssRule.replace(/\-(\w)/g, function (strMatch, p1) {
return p1.toUpperCase();
});
strValue = oElm.currentStyle[strCssRule];
}
return strValue;
};
</script>
</head>
<body>
<div id='hover_el'>hover here</div>
<div id='display'></div>
</body>
</html>
(function getStyle thanks to JavaScript get Styles)
if anyone can think of a better css property to use as a flag than solid/dashed please let me know. preferably the property would be one which is rarely used and cannot be inherited.
EDIT: CSS variable are probably better to use to check this. E.g.
const fps = 60;
setInterval(function() {
if(getComputedStyle(document.getElementById('my-div')).getPropertyValue('--hovered') == 1) {
document.getElementById('result').innerHTML = 'Yes';
} else {
document.getElementById('result').innerHTML = 'No';
};
}, 1000 / fps);
#my-div {
--hovered:0;
color: black;
}
#my-div:hover {
--hovered:1;
color: red;
}
<!DOCTYPE html>
<html>
<head>
<title>Detect if div is hovered with JS, using CSS variables</title>
</head>
<body>
<div id="my-div">Am I hovered?</div>
<div id="result"></div>
</body>
</html>
You can use an if statement with a querySelector. If you add ":hover" to the end of the selector, it will only return the element if it is being hovered. This means you can test if it returns null. It is like the element.matches(":hover) solution above, but I have had more success with this version.
Here is an example:
if (document.querySelector("body > p:hover") != null) {
console.log("hovered");
}
You can put it in an interval to run the code every time you hover:
setInterval(() => {
if (document.querySelector("body > p:hover") != null) {
console.log("hovered");
}
}, 10);