I'm trying to animate a div in a Meteor template with TweenLite - I've installed the gsop package.
My template html:
<template name="mainInit">
<div id="teaContainer">
<h1>Tea</h1>
</div>
</template>
my helper:
$(document).ready(function(){
// If the user doesn't click on Tea within 3 seconds of arriving, hint at what lies beneath
console.log($("#teaContainer").width()); // <-- THIS RETURNS NULL -->
setTimeout(function () {
TweenLite.to($("#teaContainer"), 1, {css:{"margin":"25% auto auto auto"}, ease:Linear.none}); //this effects the correct div but no transition occurs instead it snaps to location
}, 3000);
});
My CSS, I'm using Bootstrap but also this file:
#teaContainer {
display: block;
width: 30%;
height: 30%;
margin: 65% auto auto auto;
color: white;
border: 1px blue solid;
}
#teaContainer h1 {
padding: 5% 5% 5% 5%;
text-align: center;
font-size: 7em;
color: black;
border: 1px #000 solid;
}
I get no errors but the transition doesn't happen, it snaps to the final location. Also it seems to move everything in the template instead of the specific target. If I log the div's width before the timer fires it returns null, otherwise if I log from within the timed function it returns the correct pixel width.
I'm totally lost, any ideas?
Thanks.
UPDATE: I've also tried to defer the function after the template is rendered. This fixes the null issue but doesn't stop the tween effecting everything in the yield.
Template.mainInit.rendered = function() {
console.log($("#teaContainer").width());
TweenLite.to($("#teaContainer"), 1, {css:{"margin":"25% auto auto auto"}, ease:Linear.none});
}
The answer came from the Greenock forum:
http://greensock.com/forums/topic/9575-using-greensock-with-meteor/
If you make the teaContainer a template, then you can just wire the tween to Template.teaContainer.rendered..
No?
I just tried it and it works for me. I'm using infinitedg:gsap Meteor package in 0.9.3
When I'm using an javascript alert it's going on top of the browser, not in center position in current version of chrome. How can I control it, and make it center with javascript. In firefox and IE,it's working just fine.
My current chrome version 30.0.1599.66
I want to position the alert box in exact center of the browser for all type of browsers and for all versions. Please help........
Any other simple idea on providing alert so that it could be centered, would also be appreciable...
Being dependent upon the browsers for the alerts is not a good choice for any. They change rapidly and are not the same for different browsers.
What i have found useful is to use Alertify JS for all the alert needs. You can customize it for your needs and it looks fabulous anyway.
Since it is a default box, u cannot position it, though u can create your own and position it accordingly..
try this
http://jqueryui.com/dialog/
You want alert() dialog position in center. Try this simple script.js
// alertMX - improve alert()
$("<style type='text/css'>#boxMX{display:none;background: #333;padding: 10px;border: 2px solid #ddd;float: left;font-size: 1.2em;position: fixed;top: 50%; left: 50%;z-index: 99999;box-shadow: 0px 0px 20px #999; -moz-box-shadow: 0px 0px 20px #999; -webkit-box-shadow: 0px 0px 20px #999; border-radius:6px 6px 6px 6px; -moz-border-radius: 6px; -webkit-border-radius: 6px; font:13px Arial, Helvetica, sans-serif; padding:6px 6px 4px;width:300px; color: white;}</style>").appendTo("head");
function alertMX(t){
$( "body" ).append( $( "<div id='boxMX'><p class='msgMX'></p><p>CLOSE</p></div>" ) );
$('.msgMX').text(t); var popMargTop = ($('#boxMX').height() + 24) / 2, popMargLeft = ($('#boxMX').width() + 24) / 2;
$('#boxMX').css({ 'margin-top' : -popMargTop,'margin-left' : -popMargLeft}).fadeIn(600);
$("#boxMX").click(function() { $(this).remove(); }); };
Include Jquery and use javascript:
alertMX('Hello!');
You cannot control the way browser display alert. Instead, you should write your own function to display div with your message. It could be something like that:
function customAlert(msg) {
var alertDiv = "<div style='position: fixed; top: 20px; left: 20px;'>"+msg+"</div>";
document.getElementsByTagName('body')[0].appendChild(alertDiv);
}
Ofcourse you should do some calculation there to properly position the div where you want. Also it would be much easier if you use jQuery or some other js framework...
[Edit]
Try something like that if you want to force popup from JS.
Popup example
I'm looking to make a page that has a background gradient that changes color every few seconds and blends between transitions. Now I want to apply this effect on the to the upper elements that are blocked by a element that has a solid background.
To give you a better example what I mean I have attached a simple mockup and hopefully your understand what I'm attempting to do, I'm open to suggestions.
(source: bybe.net)
The problem is obviously the block that contains the black background which any PNG transparent used would see black not the gradient.
I'll include sample code so far:
<body><!-- A Jquery script will be used to add CSS background, Easy stuff -->
<div class="blackbox">
<div class="logo"><img src="#" alt=""></div>
<hr class="h-line">
<div class="v-line"> </div>
</div>
So what I'm after is either:
A known jQuery method to obtain a background image but it needs to be able to refer of the position of the gradient so its inline with the background.
A better solution to getting this to work, please bare in mind that the page needs to be responsive so I could use other methods but since its responsive I can't think of any.
Since you ask for alternatives to jQuery solutions
You could play a little with margins and box-shadow and keyframe animations.
Something in this direction for the shape (depends on what you want to do with which part - add content ... and in what way you want it to be responsive):
html:
<div class="wrapper">
<div class="header"><img src="http://i.imgur.com/CUbOIxr.png" alt="Company name" /></div>
<div class="content"></div>
</div>
CSS:
body {
background:orange;
width:100%;
height:100%;
}
.wrapper {
width:40%;
height:90%;
border:30px solid #000;
border-right-width:100px;
border-bottom-width:100px;
}
.header {
width:100%;
border-bottom:10px solid transparent;
-webkit-box-shadow: 0 30px 0 #000;
-moz-box-shadow: 0 30px 0 #000;
box-shadow: 0 30px 0 #000;
}
.header img {
width:100%;
}
.content {
width:95%;
height:400px;
background-color:#000;
margin-top:30px;
}
DEMO
This way no javascript is needed. And for the background you can use a linear gradient and do all animations with css transitions or keyframe animations. You also need to play with the lengths and adjust the borders and box-shadows to your needs, maybe add some #media queries for the responsiveness.
Hope this helps you a little in the right direction =)
Update:
I hoped the gradients changing was the smaller problem ;-) Silly me, sorry.
I will elaborate my CSS-only suggestion for the animation, but you can choose a javascript slider for the background animation, if you don't like CSS3 solutions - although this is the hot stuff now ;-)
Ok. So, I would add some more fixed positioned elements with gradient backgrounds (layer1 and layer2).
To have something in this direction in the html now:
<div class="layer layer1"></div>
<div class="layer layer2"></div>
<div class="wrapper">
<div class="header">
<img src="http://newtpond.com/test/company-name.png" alt="Company name" />
</div>
<div class="content"></div>
</div>
and add a keyframe animation on them in CSS (here it is just with the -webkit vendor prefix [probably cause I am a lazy bum], but I hope you can get the idea, and could add the others):
body {
width:100%;
height:100%;
margin:0;
padding:0;
}
/* for the animation */
.layer {
position:fixed;
width:100%;
height:100%;
}
#-webkit-keyframes GoLayer1 {
0% {
opacity:1;
}
50% {
opacity:0;
}
100% {
opacity:1;
}
}
#-webkit-keyframes GoLayer2 {
0% {
opacity:0;
}
50% {
opacity:1;
}
100% {
opacity:0;
}
}
.layer1 {
background: -webkit-linear-gradient(bottom, rgb(43, 70, 94) 29%, rgb(194, 41, 41) 65%, rgb(155, 171, 38) 83%);
-webkit-animation: GoLayer1 5s infinite;
}
.layer2 {
background: -webkit-linear-gradient(bottom, rgb(225, 202, 230) 29%, rgb(39, 163, 194) 65%, rgb(36, 124, 171) 83%);
-webkit-animation: GoLayer2 5s infinite;
}
/* the wrapper shape */
.wrapper {
z-index:999;
opacity:1;
position:relative;
width:40%;
height:90%;
border:30px solid #000;
border-right-width:100px;
border-bottom-width:100px;
}
.header {
width:100%;
border-bottom:10px solid transparent;
-webkit-box-shadow: 0 30px 0 #000;
-moz-box-shadow: 0 30px 0 #000;
box-shadow: 0 30px 0 #000;
}
.header img {
width:100%;
}
.content {
width:95%;
height:400px;
background-color:#000;
margin-top:28px;
}
DEMO (tested in Chrome 26 - looked cool =)
This is now where I can point you according this CSS-only approach. There is still stuff to modify and consider browser compatibility. But it is certainly an alternative ... and a step in the direction where html5 and css3 is going (if you want to be hot and cool ;-), hehe, sorry, too much silliness.
Good luck!
Update 2:
So, I overcame my laziness a tiny bit and added some more vendor prefixes to the top example (and of course you can use any image as background):
DEMO
And here I add another example, that is using a png image for the gradient, and is sliding up and down in the background (as another alternative):
DEMO
There are many ways to do this, CSS3 and images are already suggested, so I'll suggest using a canvas.
The HTML canvas element has everything you need built in. It allows for gradient background fills, and with globalCompositeOperation, masking of shapes and text is possible, creating cut-outs in the background to make real changeable HTML elements truly transparent against a colored background. It also scales well, and can easily be made responsive.
The canvas element is supported in all major browsers except Internet Explorer 8 and below, which means browser support is better than many of the CSS3 methods previously mentioned, like keyframes and background-size.
Using a fallback, like say images that fade in and out if canvas is'nt available, should'nt be very hard to figure out, and in all other browsers except Internet Explorer below version 9, no images would be needed to create the gradient backgrounds and text masks in a canvas, which should make the loading of the page significantly faster.
To detect wether or not canvas is supported, you can use this convenient function :
function isCanvasSupported(){
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
}
used like so :
if ( isCanvasSupported() ) {
// do canvas stuff
}else{
// fall back to images
}
So, lets get to it! To create a "last resort" fallback and some elements we can "clone" into the canvas, we'll create the elements we need in the HTML to get a structure somewhat similar to what you've outlined in your question. This has the added advantage of being able to just change some of the CSS to also make changes in the canvas :
<div id="gradient">
<div class="text">COMPANY NAME</div>
<div class="h_bar"></div>
<div class="v_bar"></div>
</div>
It's just a container with an element for text, and one for each of the bars.
Some styling is neccessary as well, I'll do it the easy way, with position absolute and some really fast positioning, as these elements won't be visible unless someone has disabled javascript anyway :
#gradient {position: absolute;
background: #000;
top: 5%; left: 5%; right: 5%; bottom: 5%;
}
.text {position: absolute;
top: 20px;
left: 100px;
width: 400px;
color: #fff; font-size: 40px; font-weight: bold;
font-family: arial, verdana, sans-serif;
}
.h_bar {position: absolute;
height: 20px;
top: 100px; left: 60px; right: 60px;
background: #fff;
}
.v_bar {position: absolute;
width: 20px;
top: 140px; bottom: 30px; right: 60px;
background: #fff;
}
Without any javascript that would look exactly like THIS FIDDLE, and it should be somewhat responsive and adapt to the window size.
Now we need some javascript to turn those elements into something in a canvas. We'll create two canvas elements, one for the background, as I've decided to animate the background continously between random gradients, and one for the inner black box and the content (the text and the bars).
As the masking of the text and bars can be a little slow, we don't have to redraw everything, just the background canvas, as the foreground is pretty static.
This also avoids a flickering issue in some browsers with high frame rates, and we're going to use requestAnimationFrame for the animation of the background canvas, so flickering in the text mask would be an issue if we did'nt use two canvas elements.
For browsers that does'nt support requestAnimationFrame we'll add this polyfill to make sure it works everywhere.
Time to write some javascript, this of course uses jQuery :
var gradSite = {
init: function() {
var self = this;
self.create().setSizes().events();
(function animationloop(){
requestAnimationFrame(animationloop);
self.draw().colors.generate();
})();
},
create: function() { // creates the canvas elements
this.canvas = document.createElement('canvas');
this.canvas2 = document.createElement('canvas');
this.canvas.id = 'canvas1';
this.canvas2.id = 'canvas2';
this.canvas.style.position = 'absolute';
this.canvas2.style.position = 'absolute';
$('#gradient').after(this.canvas, this.canvas2);
return this;
},
events: function() { //event handlers
$(window).on('resize', this.setSizes);
$('#gradient').on('contentchange', this.draw2);
return this;
},
setSizes: function() { // sets sizes on load and resize
var self = gradSite,
w = $(window),
m = $('#gradient');
self.canvas.height = w.height();
self.canvas.width = w.width();
self.canvas2.bg = m.css('background-color');
self.canvas2.height = m.height();
self.canvas2.width = m.width();
self.canvas2.style.top = m.offset().top + 'px';
self.canvas2.style.left = m.offset().left + 'px';
self.draw2();
return self;
},
colors: {
colors: {
0: [255,255,0],
1: [255,170,0],
2: [255,0,0]
},
map: {
0: [0,0,1],
1: [0,1,1],
2: [0,1,1]
},
generate: function() { // generates the random colors
var self = this;
$.each(self.colors, function(i,color) {
$.each(color, function(j, c) {
var r = Math.random(),
r2 = Math.random(),
val = self.map[i][j] == 0 ? (c-(j+r)) : (c+(j+r2));
if (c > 255) self.map[i][j] = 0;
if (c < 0 ) self.map[i][j] = 1;
self.colors[i][j] = val;
});
});
}
},
raf: (function() { // polyfill for requestAnimationFrame
var lastTime = 0,
vendors = ['webkit', 'moz'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime(),
timeToCall = Math.max(0, 16 - (currTime - lastTime)),
id = window.setTimeout(function() { callback(currTime + timeToCall); }, timeToCall);
lastTime = currTime + timeToCall;
return id;
};
if (!window.cancelAnimationFrame)
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}()),
calculateColor: function(colors) { // returns a rgb color from the array
return 'rgb(' + Math.round(colors[0]) + ',' + Math.round(colors[1]) + ',' + Math.round(colors[2]) + ')';
},
draw: function() { //draws the color background
var self = this,
c = self.canvas || document.getElementById('canvas1'),
ctx = c.getContext('2d'),
grad = ctx.createLinearGradient(0,0,0,self.canvas.height);
c.width = c.width;
grad.addColorStop(0, self.calculateColor(self.colors.colors[0]));
grad.addColorStop(0.5, self.calculateColor(self.colors.colors[1]));
grad.addColorStop(1, self.calculateColor(self.colors.colors[2]));
ctx.fillStyle = grad;
ctx.fillRect(0,0,self.canvas.width, self.canvas.height);
return self;
},
draw2: function() { // draws the black square and content
var self = this,
c = self.canvas2 || document.getElementById('canvas2'),
ctx2 = c.getContext('2d'),
txt = $('.text', '#gradient').first(),
hbar = $('.h_bar', '#gradient').first(),
vbar = $('.v_bar', '#gradient').first();
c.width = c.width;
ctx2.globalCompositeOperation = 'xor';
ctx2.font = txt.css('font');
ctx2.fillStyle = c.bg || '#000';
ctx2.fillText(txt.text(), txt.offset().left, txt.offset().top);
ctx2.fillRect(hbar.position().left, hbar.position().top, hbar.width(),hbar.height());
ctx2.fillRect(vbar.position().left, vbar.position().top, vbar.width(),vbar.height());
ctx2.fillRect(0,0,c.width,c.height);
}
}
The raf function would be the polyfill for requestAnimationFrame, and the two draw functions create the content in the canvas. It's really not that complicated.
We will call the above script inside a DOM ready handler, like so :
$(function() {
gradSite.init(); // starts the canvas stuff
});
Adding all that up into a fiddle, and adding a few elements for demonstration purposes, it would look like THIS FIDDLE, and here's the finished ->
FULL SCREEN DEMO
The only way I can see this working is if your black div has no background and is cut into sections that that each have a background. The company name area would need to have the same foreground color as the background for the rest of the div sections. Depending on your layout needs this might be fine.
For example, you could cut it into three sections and two images:
You can try combinig background-size and background-position with javascript:
setGradientSizes = function (el) {
var width = $(document).width() + 'px', height = $(document).height() + 'px';
$(el || '.gradient:not(body)').each(function () {
var offset = $(this).offset();
$(this).css('background-size', width + ' ' + height);
$(this).css('background-position', (offset.left * -1) + 'px ' + (offset.top * -1) + 'px');
})};
Working example here -> jsbin
NOTES:
this is not 100% cross browser - background-size is supported in FF4.0+, IE9.0+, Opera 10.0+, Chrome 1.0+, Safari 3+.
For some older browsers you can try browser specific prefixes (like -moz-background-size) - my example does not cover that.
To reduce load flickering you can apply calculations at first and then add background gradient
You could make the background of the image with the text black, then set the div's background color to rgba(0,0,0,0) making it transparent
This might be helpful for you according to my understanding
There is inherit to copy a certain value from a parent to its children, but there is no property the other way round (which would involve another selector to decide which style to revert).
You will have to revert style changes manually:
div { color: green; }
form div { color: red; }
form div div.content { color: green; }
If you have access to the markup, you can add several classes to style precisely what you need:
form div.sub { color: red; }
form div div.content { /* remains green */ }
Edit: The CSS Working Group is up to something:
div.content {
all: default;
}
If I was you I'll duplicate the css and jQuery, print it on a div on top of what ever and make the overflow hidden (like masking layers but with z-index).
I made this tiny video (please ignore if background noises)
http://www.screenr.com/Qvts
its 13 seconds but only need to see the animation going on in second 5; (or go keepyourlinks.com and wait few seconds untill you can se the same box and click)
The css -the item has both clases-
.keepeos .top {
border-radius: 0.2em 0.2em 0.2em 0.2em;
color: #000066;
font-size: 40px;
height: 120%;
padding-bottom: 3px;
padding-top: 3px;
position: relative;
right: 10%;
top: -4px;
width: 120%;
}
.caja_con_sombra {
box-shadow: 0 0 4px rgba(0, 0, 0, 0.9);
}
And the javascript (posted the full script but commented on the only, in my opinion, relevant line.
<script type="text/javascript">
var variable;
function check_more(id){
var nID=$(".item_lista_links:first").attr("id"); //get the newest item's id
var tid= nID.replace('link', '');
$('#are_more').load('/includes/router.php?que=check_more&last='+tid+''); // check if newer
}
function buscar_nuevos(){
var nID=$(".item_lista_links:first").attr("id");
var id= nID.replace('link', '');
variable = setInterval('check_more('+id+')',15000); //start checking
}
function ver_nuevos(id){ // when found news and retrieving
clearInterval(variable);
$('#are_more').html(''); //clear div
/*THIS is basically the only relevant javascript line, i think */
$('#load_more').slideUp(100).load('/includes/router.php?que=load_more&last='+id+'',
function() {
variable = setInterval("check_more(139125)",15000);
$(this).slideDown(600); //start checking
return false;
});
}
</script>
So how can i prevent this shadow to expand the whole vertical animation?
I'm still not exactly sure what's going on, but I know how to fix it (at least for now). It might be due to the element sliding in mixed with a height issue in jquery for elements that are children in the sliding element, but I'm not sure. Either way:
Knowing that, here is a fix. In estilo.css , find
.keepeos {
height: auto;
}
Change that to:
.keepeos {
height: 18px;
}
This will work against you if that ever becomes multi-lined, so if you need to in the future, maybe you can switch the tag while sliding and then switch it back when it's done.
i want to give overlay and shadow effect using jQuery.i have difficulty in using it
You do not need a shadow plugin for this. Use the following cross browser shadow CSS properties and put them in a class name .shadow. Then using jquery's addClass() function you can add the shadow class to any element that you want to have a shadow.
CSS
.shadow{
-moz-box-shadow: 3px 3px 4px #ccc;
-webkit-box-shadow: 3px 3px 4px #ccc;
box-shadow: 3px 3px 4px #ccc; /* For IE 8 */
-ms-filter: "progid:DXImageTransform.Microsoft.Shadow(Strength=4, Direction=135, Color='#cccccc')"; /* For IE 5.5 - 7 */
filter: progid:DXImageTransform.Microsoft.Shadow(Strength = 4, Direction = 135, Color = '#cccccc');
}
jQuery
$('div').addClass('shadow');
The above jQuery selector will apply shadow to div element. Similarly you can apply the same shadow class to any element that you want to have a shadow. You can Adjust the shadow CSS properties as needed.
Check working example at http://jsfiddle.net/ttCSQ/1/
the shadow part:
<script type="text/javascript">
$(function(){
$("#exampleDiv").shadow({
width:5,
startOpacity:60,
endOpacity:10,
cornerHeight:8,
color:"#000000"
});
})
</script>
this is for the overlay part : http://flowplayer.org/tools/overlay/index.html