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I want to have a div that fades in when you have scrolled a certain amount of pixels, without using jquery, only using javascript.
Jquery is Javascript, so unless you loop a listener (for scroll) in JS to change something in the document object model, you will find yourself having to use HTML5 (css3 and some jquery), like this (From Codepen)
HTML
<div class="top"><div class="title">Fade Away</div></div>
CSS
body {
margin: 0;
height: 1000px;
}
.top {
margin: 0;
position: relative;
width: 100%;
background-color: #aaa;
height: 300px;
opacity: 1;
text-align: center;
font-family: 'helvetica';
font-size: 80px;
font-weight: 100;
color: #fff;
}
.title {
position: absolute;
top: 60%;
left: 100px;
}
JS
$(window).scroll(function(){
$(".top").css("opacity", 1 - $(window).scrollTop() / 250);
});
There are several pre-written parallax scripts you can use, like this one called skrollr, which will enable you to just add a reference to the JS file and then add CSS to your page code: https://prinzhorn.github.io/skrollr/
I hope that helps you get started!
To get the scroll position from top, you can use the document.pageYOffset property.
To fade something in, you have to use a setInterval, you can see it here:
How to do fade-in and fade-out with JavaScript and CSS
Related
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I am trying to achieve this result, and have no clear idea how to do, but to resize element in javascript.
Are there any options to do so in SASS/CSS?
I found this npm package:
https://www.npmjs.com/package/sass-proportions.
But asking, in case anyone know any better/simple way?
This is easily achieved with only HTML and CSS
I attached a CodePen reference. View here
You will need 3 boxes
<div class="wrapper">
<div class="ratio-box">
<div class="content">I am a div that mantains its aspect ratio</div>
</div>
</div>
The wrapper box has a defined width, which is your element's width":
.wrapper {
width: 200px;
}
.ratio-box {
width: 100%;
padding-bottom: 50%;
position: relative;
}
.content {
height: 100%;
width: 100%;
position: absolute;
top: 0;
left: 0;
}
This works because the padding-bottom property is relative to the width property of its parent element.
Want a specific aspect ratio?
For a 2:1 aspect ratio, use padding-bottom: 50%;
For a 16:9 aspect ratio, use padding-bottom: 56.25%;
For a 9:16 smartphone aspect ratio, use padding-bottom: 177.78%;
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If I don't use javascript to listen the event of resize. Is that any method to center the div?
The css structure contain 3 state. normal , under 900px, under 550px.
When the width is over 550px. I can set the section to center. When the screen is under 550px. I used scale to reduce the size and then I am unable to set it to center.
I tried change to position to fixed/relative, left/ float/transform-origin/translateX/use vw/margin/padding...
Is that I must use javascript to listen the window resize and then change the left property for the css of the section?
my website is on http://php-kkhchan.rhcloud.com
CSS:
#media screen and (max-width: 900px) {
.box {
width: 520px;
height: 650px;
}
#tabs {
width:520px ; height: 650px;
position: static;
margin: 0 auto;
padding-top: 1em;
}
}
#media screen and (max-width: 550px) {
#tabs, .box {
transform: scale(0.6,0.6);
left: -14%;
position: relative;
}
}
HTML:
<section id="tabs">
<article class="c_tab box" id="tab0" style="background: #A9D0F5;">
testing
</article>
</section>
You can also take reference to below jsfuddle
JSfuddle
finally, I used javascript to handle. the following is my solution.
I am not sure if it is the best solution.
$(window).resize(function(){
if ($(window).width()<=550) {
$('#tabs').trigger('customresize');
}
});
$('#tabs').on('customresize',function(){
myWidth=($(window).width() - 545)/2 +'px';
$(this).css('left',myWidth);
});
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I am currently working with parallax effects on a website where i need a paragraph to go through halfway on the bottom of the page. But since the paragraph has to be responsive in font-size i am not quite sure if i need to convert the text into image or stick with pure text to solve this issue? It seems like a solution with images can enable me to do some tricks with pure JavaScript.
In general i feel it is very hard to control the text on the page especially for parallax where the text can appear in different positions. Maybe there are some good tools for this purpose?
https://jsfiddle.net/pt88w26u/2/
HTML:
<section id="first">
<div>
<p>This is a test</p>
</div>
</section>
<section id="second">
</section>
CSS:
html,
body {
height: 100%;
color: #fff;
font-size: 16px;
margin: 0;
padding: 0;
}
section {
min-height: 100%;
}
#first {
background-color: #000;
}
#second {
background-color: #ddd;
}
section > div {
top: 86%;
font-size: 5em;
position: absolute;
transform: translate(-50%, 0%);
left: 50%;
}
You can do this only with css.
To do this, set the position and transform of the div to
bottom:0px;
transform:translate(-50%,50%);
and remove the default margin on the p tag.
https://jsfiddle.net/pt88w26u/5/
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I´m using this tumblr theme:
http://flataura.tumblr.com/
And I want the slide menu at the right of the text "Flaty" that opens when you click on it, to be always opened. Is there any solution for this?
Here is the javascript of that slide:
http://static.tumblr.com/ssdtkch/gT6nanpl7/pageslide.js
Thanks!
Seeing from a comment that you are familiar enough to edit the CSS. Add this to the bottom of your CSS and it should show the menu AND hide the button that animates the show/hide:
body {
margin-left: 281px;
}
div#side {
display: block !important;
left: 0;
right: auto;
position: fixed;
top: 0;
height: 100%;
z-index: 1000000;
overflow-y: scroll;
width: 280px;
background-color: rgba(33,63,82, 0.93);
border-right: 1px solid #213f52;
}
a.open-sidebar.nav-button {
display: none;
}
Yes, there are ways to do this. But since it doesn't seem like you're very familiar with websites, the solution is too complicated via StackOverflow. Let me know if you would like to get in contact, and I can walk you through this.
In a nutshell, the #side element contains that left bit, but is always hidden. The #pageslide element is what gets shown, and as soon as you click the first time, the contents of #side get cloned into #pageslide. Then, jQuery (Javascript) is used to animate the transition, introducing a margin to your entire body element.
All of this can be overridden, but it is several steps. If you know a web developer, that information above should get them started. Otherwise, let me know if you want to get in contact.
Good luck!
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I am working on rebuilding my personal site and I have two elements which are floated side by side first at 80% and second at 20%.
http://codepen.io/anon/pen/xgask
SCSS
.container
width: 80%
margin: 0 auto
outline: 2px solid green
overflow: hidden /* Only used this here as a clearfix */
.text, .avatar
float: left
.text
width: 70%
outline: 1px solid red
.avatar
width: 25%
margin-left: 5%
outline: 1px solid blue
img
display: block
max-width: 100%
HTML
<div class="container">
<div class="text">
<p>Lots of text ...<p>
<p>Lots of text ...</p>
</div>
<div class="avatar">
<img src="http://www.foxprime.net/wp-content/uploads/2013/08/gravity-max-roller-coaster.jpg" />
</div>
</div>
On desktop sizes that is perfect. If the text in the first element is longer than the picture in the second the text does not wrap underneath which is what I want.
However, on mobile sizes I wish the text element to be full width and the picture to float right so the text wraps around.
With two separate elements as they are this is impossible, so is it appropriate to use javascript with something like enquire.js to react to the media query which then detaches the picture and places it at the beginning of the text element and have a style to float it right.
I know how to code it all, no problems there, just asking if it is appropriate to use a tiny bit of javascript to assist me getting the responsive layout I want?
With Responsive Web Design, there are many ways to accomplish the same thing; No one way is right.
Personally, I would try to work out a CSS-only solution or a solution that reorganizes my HTML markup to the best of my ability to reach the desired result. Only if I've exhausted all options in to making a CSS/Markup-only solution work would I turn to JavaScript.
In other words, yes, JavaScript is appropriate if it reaches your end result. However, if it's possible via Markup/CSS manipulation and no JavaScript, that is always the better choice.
If you don't mind putting the .avatar column first, you can get the exact results you want. Otherwise, I'd just hide and show with css, if it's just one image. Usually I avoid using jQuery unless it's absolutely necessary and after 3 years of responsive stuff, you get to know when to use it and when not to use it.
http://codepen.io/anon/pen/nfvmj
This is mobile first.
Put the .avatar before the .text in the html:
.container {
margin: 0 auto;
width:90%;
outline: 2px solid green;
overflow: hidden;
/* Only used this here as a clearfix */
}
.text {
outline: 1px solid red
}
.avatar {
float: right;
width: 50%;
margin:0 0 2% 2%;
}
.avatar img {
max-width: 100%
}
#media (min-width:600px) {
.text {
width: 70%;
float: left;
}
.avatar {
float: right
}
.container {
width: 80%;
}
.avatar {
width: 25%;
margin: 0 0 0 5%;
}
}