I want to display this light if a certain condition is true in javascript using an if statement. How can I add an external CSS class to a javascript if statement?
Here is my css code:
.beacon{
position:absolute;
background-color:#32CD32;
height:1.5em;
width:1.5em;
border-radius:50%;
-webkit-transform:translateX(-50%) translateY(-50%);
}
.beacon:before{
position:absolute;
content:"";
height:1.5em;
width:1.5em;
left:0;
top:0;
background-color:transparent;
border-radius:50%;
box-shadow:0px 0px 2px 2px #32CD32;
-webkit-animation:active 2s infinite linear;
animation:active 2s infinite linear;
}
#-webkit-keyframes active{
0%{
-webkit-transform:scale(.1);
opacity:1;
}
70%{
-webkit-transform:scale(2.5);
opacity:0;
}
100%{
opacity:0;
}
}
#keyframes active{
0%{
transform:scale(.1);
opacity:1;
}
70%{
transform:scale(2.5);
opacity:0;
}
100%{
opacity:0;
}
}
this is the javascript code:
<div class="too white">
<script language="javascript">
url = "http://www.511virginia.org/"
ping = new XMLHttpRequest();
ping.onreadystatechange = function(){
if(ping.readyState == 4){
if(ping.status == 200){
document.write("Website is up");
}
else {
document.write("Website is down");
}
}
}
ping.open("GET", url, false);
ping.send();
</script>
</div>
It depends on any framework you're using. For example, if you're using jQuery then change a DOM element's CSS using .css(property, value). Angular has it's own methods. For raw DOM manipulation take a look at the w3c page on JavaScript HTML DOM - Changing CSS, which shows the following.
document.getElementById(id).style.property = new style
Related
The current GMail Login Page has an "Email or phone" placeholder text that reduces in size and moves towards the top-left corner of the field on focus. How to achieve something similar using CSS and/or JS?
first of all, welcome to StackOverflow!
It's called "floating labels", and it can be achieved by using CSS alone (which can turn out to be a little hard if you are not really familiar with pseudo-selectors like :focus and :empty) or by using a little of JS, which may be a little easier.
You can take a look at some examples here: https://css-tricks.com/float-labels-css/
An easy and simple example for you:
label {
margin:20px 0;
position:relative;
display:inline-block;
}
span {
padding:10px;
pointer-events: none;
position:absolute;
left:0;
top:0;
transition: 0.2s;
transition-timing-function: ease;
transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
opacity:0.5;
}
input {
padding:10px;
}
input:focus + span, input:not(:placeholder-shown) + span {
opacity:1;
transform: scale(0.75) translateY(-100%) translateX(-30px);
}
/* For IE Browsers*/
input:focus + span, input:not(:-ms-input-placeholder) + span {
opacity:1;
transform: scale(0.75) translateY(-100%) translateX(-30px);
}
<label>
<input placeholder=" ">
<span>Placeholder Text</span>
</label>
How to detect that the animation reached a specific keyframe? (For example 50% or 75%).
This is what I tried:
element.addEventListener("animationend", AnimationListener, false);
but it supports animationstart, animationiteration and animationend only.
http://jsfiddle.net/W3y7h/294/
Using the example Fiddle provided, what you're essentially looking to know is when the value of #sun element's bottom property is equal to 100px. You can do this by using getComputedStyle() to check that value, clearing the interval when it is equal to 100px and then executing whatever code you wish, like so:
var style=window.getComputedStyle(document.getElementById("sun")),
interval=setInterval(function(){
if(parseInt(style.getPropertyValue("bottom"))===100){
clearInterval(interval);
console.log("50% reached");
}
},1);
#sun{
animation:sunrise 1s ease;
bottom:0;
background:#ff0;
border-radius:50%;
height:50px;
position:absolute;
width:50px;
}
#keyframes sunrise{
0%{
bottom:0;
left:0;
}
50%{
bottom:100px;
}
100%{
bottom:0;
left:400px;
}
}
<div id="sun"></div>
To check for multiple values, simply set a new interval. In the case of your example, the value of the bottom property should be 50px when the animation is 75% complete. That being said, it may not always be exactly 50px in every browser so, instead, given that we know the value of the bottom property will be decreasing at this point, instead check for it being less than or equal to 50:
var style=window.getComputedStyle(document.getElementById("sun")),
interval=setInterval(function(){
if(parseInt(style.getPropertyValue("bottom"))===100){
clearInterval(interval);
console.log("50% reached");
interval=setInterval(function(){
if(parseInt(style.getPropertyValue("bottom"))<=50){
clearInterval(interval);
console.log("75% reached");
}
},1);
}
},1);
#sun{
animation:sunrise 1s ease;
bottom:0;
background:#ff0;
border-radius:50%;
height:50px;
position:absolute;
width:50px;
}
#keyframes sunrise{
0%{
bottom:0;
left:0;
}
50%{
bottom:100px;
}
100%{
bottom:0;
left:400px;
}
}
<div id="sun"></div>
What I am trying to achieve is so that a marquee plays once when I click the button. My problem is that if I set the loop to 1 then it only plays once and then does nothing. My other problem is that it stops midway with my current code if I let go of the left mouse button. Or it stops where it was. Is there any way to make it either play once when the button is pressed and then play again whenever the button is pressed again and allow it to complete the loop completely. Here is the code, I am open to using java script instead of html. Here is my current code:
<marquee behavior="scroll" direction="up" scrollamount="30" id="marquee" height="40">
<p>+1</p>
</marquee>
<input type="button" id="gather" class="build" Value="play" onmousedown="document.getElementById('marquee').start()." onmouseup="document.getElementById('marquee').stop()" onload="document.getElementById('marquee').stop()">
You can use CSS keyframes and JQuery (or Javascript) in order to accomplish that.
In the example below, I'm using CSS rules to achieve the animation effect, and applying it adding/removing the span element from te DOM using JQuery.
Code example:
var marquee = '<span class="anim">+1</span>';
$('.btn').click(function(){
$('.anim').remove(); //remove the node if its there
$('.marquee').append(marquee); //append the node
});
.marquee{
width: 20px;
height: 20px;
overflow:hidden;
}
.marquee > span {
position:relative;
top:-100%;
left:0;
}
.anim{
animation-name: example;
animation-duration: 2s;
}
#keyframes example {
0%,100% {
opacity:0;
top:100%;
}
50% {
opacity:1;
top:0;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="marquee"></div>
<button class="btn">Click here!</button>
Are you willing to use pure CSS?
It seems like you want a "+1" counter on click. You can accomplish this using CSS transitions. I'm going to use an anchor rather than an input, because you have more control over styling it.
You'll probably want to add some movement to it, change the timing, maybe swap linear to ease-out, but this is a starting point. Please consider it a proof of concept.
HTML:
a.play {
padding:6px 8px;
border-radius:4px;
background:#ccc;
border:1px solid #bbb;
text-decoration:none;
color:#111;
position:relative;
}
a.play:focus:before,
a.play:active:before {
Content:"+1";
position:absolute;
top:-16px;
left:6px;
color:#006699;
font-weight:bold;
-webkit-animation: fadeinout 1.3s linear forwards;
animation: fadeinout 1.3s linear forwards;
}
#-webkit-keyframes fadeinout {
0%,100% { opacity: 0; }
10% { opacity: 1; }
}
#keyframes fadeinout {
0%,100% { opacity: 0; }
10% { opacity: 1; }
}
<div style="height:60px;"></div>
Play
My jquery/js code is not waiting for images loaded to fade out. What is the problem?
$('#entry').css('background-image','url(../img/backg3.jpg)').waitForImages(function() {
$('#load').fadeOut(1000);
$('.spinner').fadeOut(1000);
});
/*******************
Loading
*********************/
#load {
position:absolute;
height:100vh;
width:100vw;
background-color:#ddd;
z-index:1000;
/*-moz-transition:all 2s ease-out;
-webkit-transition:all 2s ease-out;
-webkit-transition:all 2s ease-out;
transition:all 2s ease-out;*/
}
#-o-keyframes spin {
100%{
-o-transform: rotate(360deg);
transform: rotate(360deg);
}
}
#-moz-keyframes spin {
100%{
-moz-transform: rotate(360deg);
transform: rotate(360deg);
}
}
#-webkit-keyframes spin {
100%{
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
#keyframes spin {
100%{
transform: rotate(360deg);
}
}
.spinner {
position:absolute;
top:45vh;
left:45vw;
width:5vh;
height:5vh;
border: 6px solid #F90;
border-left-color:#FC3;
border-bottom-color:#FF6;
border-right-color:transparent;
border-radius:100%;
animation: spin 400ms infinite linear;
margin: auto;
}
<div id="load">
<div class="spinner"></div>
</div>
So I want while my background image is loading to hold the spinner, but it fade outs without image.
Page - http://sarosacramento.com/
Plugin - https://github.com/alexanderdickson/waitForImages
From their github page, it looks like you're supposed to apply .waitForImages() to an element selector (which either has image children or images in its CSS). In your code, instead of applying it to the selector, you're first adding CSS, then trying to apply .waitForImage(), which won't work, since the .css() doesn't return a selector. Try instead:
$('#entry').waitForImages(function () {
$('#load').fadeOut(1000);
$('.spinner').fadeOut(1000);
});
for the JS and just put the background image in normal CSS:
#entry {
background-image: url(../img/backg3.jpg);
}
(If you must set it via JS, do that before applying .waitForImages() to $("entry"):
$('#entry').css('background-image','url(../img/backg3.jpg)');
$('#entry').waitForImages(function () { ...
though I haven't actually tested this.)
Here's an example: http://jsfiddle.net/aq9t6kvk/2/. (It mostly uses your code, but I used some different images that wouldn't be in our caches already. But since the first one might already be loading while JSFiddle is "initializing the awesome", there are some backups for subsequent "Run"s.)
I am trying to make the divs flip whenever I click on them. I'm not sure why it doesn't work. Please help.
Here is the demo of this code. http://langbook.co/testicles-1-2-flashcards/
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
#flip3D{ width:240px; height:200px; margin:10px; float:left; }
#flip3D > #front{
position:absolute;
transform: perspective( 600px ) rotateY( 0deg );
background:#FC0; width:240px; height:200px; border-radius: 7px;
backface-visibility: hidden;
transition: transform .5s linear 0s;}
#flip3D > #back{
position:absolute;
transform: perspective( 600px ) rotateY( 180deg );
background: #80BFFF; width:240px; height:200px; border-radius: 7px;
backface-visibility: hidden;
transition: transform .5s linear 0s;}
</style>
<script>
function flip(el){
el.children[1].style.transform = "perspective(600px) rotateY(-180deg)";
el.children[0].style.transform = "perspective(600px) rotateY(0deg)";}
var vlib = document.getElementById('front');
vlib.addEventListener(click, flip(el));
</script>
<title>Flashcards</title>
</head>
<body>
<div id="flip3D">
<div id="back">Box - Back</div>
<div id="front">Box - Front </div>
</div>
</body>
</html>
First, I would move your JS to the end of the page.
It also seems like you want to be calling flip() on #flip3D, because you are trying to access it's child elements, like so:
var vlib = document.getElementById('flip3D');
vlib.addEventListener('click', flip(vlib));
To flip back, you could just keep the object's state in an attribute to know which side it's on. Also note that flip(vlib) will be called immediately; to wait for the click event, you'll need to pass a reference to the function:
vlib.addEventListener('click', flip);
Seems to work: JSFiddle
http://www.w3schools.com/css/css3_2dtransforms.asp
http://www.w3schools.com/css/css3_3dtransforms.asp
Not sure if you have tried this but this my solve your problem. Using just CSS you can do the exact same thing (by the sounds of what you are trying to achieve).
Hope this helps.
ex:
http://www.w3schools.com/cssref/playit.asp?filename=playcss_backface-visibility
easy one CSS line :
animation:mymove 3s infinite;
where mymove is:
#keyframes mymove
{
from {transform:rotateY(0deg);}
to {transform:rotateY(360deg);}
}
#-moz-keyframes mymove /* Firefox */
{
from {-moz-transform:rotateY(0deg);}
to {-moz-transform:rotateY(360deg);}
}
#-webkit-keyframes mymove /* Opera, Safari, Chrome */
{
from {-webkit-transform:rotateY(0deg);}
to {-webkit-transform:rotateY(360deg);}
}
#-ms-keyframes mymove /* Internet Explorer */
{
from {-ms-transform:rotateY(0deg);}
to {-ms-transform:rotateY(360deg);}
}
example:
div#myDIV
{
animation:mymove 3s infinite;/* <== HERE */
/* Firefox */
-moz-animation:mymove 3s infinite;
-moz-animation-timing-function:linear;
/* Opera, Safari, Chrome */
-webkit-animation:mymove 3s infinite;
-webkit-animation-timing-function:linear;
}
You had a few mistakes with syntax and declarations in the JS part.
Hope this is what you are looking for:
https://jsfiddle.net/xrtvhvgf/2/
function flip(){
if(vlib_front.style.transform){
el.children[1].style.transform = "";
el.children[0].style.transform = "";
} else {
el.children[1].style.transform = "perspective(600px) rotateY(-180deg)";
el.children[0].style.transform = "perspective(600px) rotateY(0deg)";
}
}
var vlib_front = document.getElementById('front');
var el = document.getElementById('flip3D');
el.addEventListener('click', flip);