jQuery fadeIn making page scroll to top / jump - javascript

jQuery is destroying me this week. I'm using fadeIn via jQuery on my portfolio site (http://www.codeisdna.com) to open up a section once it's clicked. Here's the HTML code I'm using:
<div class="project first project_name">
<div class="title">
Project Title!
<div class="date">2012</div>
</div>
<a class="expand" title="Click to expand the project." href="#project_1">Project Title!</a>
</div>
Which opens up a tab:
<div id="project_1" class="project_full pname"></div>
Using this js:
$(document).ready(function(){
$(".project").click(function() {
$("a.expand").removeClass("hovered");
$(this).find("a.expand").addClass("hovered");
$(".project_full").hide();
var selected_tab = $(this).find("a").attr("href");
$(selected_tab).fadeIn();
return false;
});
});
EDIT: Here is the CSS code for .project_full (the expanded tab -- the CSS code for .project is irrelevant):
.project_full {
display: none;
margin-top: 20px;
width: 100%;
max-height: 450px;
padding: 20px 0px;
text-align: center;
background: url(../img/code.jpg) top center no-repeat fixed #293134;
box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
color: #fff;
overflow: hidden;}
.project_full .wrapper {position: relative;}
I've tried assigning a fixed height to a parent div, e.PreventDefault() doesn't work (I'm using anchor based tabs, so nothing of that sort will work), and so on. The page jumps on the first click and with each successive click. I know it jumps due to the missing content once the div is unhidden and "rehidden."
I'm wondering if HTML5 data attributes would remedy this? But then again, why would it as the anchor would still exist, albeit it being blank (#).
Hopefully someone with a lot more JS experience can help me!

Either change your handler adding preventDefault
$(".project").click(function(e) {
e.preventDefault();
$("a.expand").removeClass("hovered");
$(this).find("a.expand").addClass("hovered");
$(".project_full").hide();
var selected_tab = $(this).find("a").attr("href");
$(selected_tab).fadeIn();
return false;
});
Or change your a tag href attribute to be something like 'javascript:'
Or replace a tag with say span and let your click handler remain unchanged.
Or add name attribute to a tag (<a name='project_1'></a>) in right place as it is scrolling to this tag or beginning of the page as there is no ancor with corresponding name

Related

Animating the "body" tag in jQuery does nothing

So one of the buttons on my site's nav bar brings down a small grey tab from the top which tells you about the site. Here is the code I'm using for the animations:
var aboutMenu = function(){
$(".aboutButton").click(function(){
$("body").animate({top: "42px"}, 200);
$(".about").animate({top: "0px"}, 200);
});
}
$(document).ready(aboutMenu);
The idea is that the body of my website, along with all its content, moves down 42 pixels. This is whilst the content in the "about" class moves down so that it's visible on the screen. If you do click on the "About" button, all that happens is the grey tab moves down, but the body stays where it is. This would not usually be a problem, except the tab obscures the rest of the nav bar.
Here is some more relevant code (if needed):
HTML:
<div class = "about">
<p align = "center">placeholder text</p>
</div>
and the actual link:
<li> <a class = "aboutButton">About this website</a></li>
CSS:
.about{
background-color: gray;
top: -42px;
height: 42px;
position: fixed;
}
.about p{
color: white;
}
.aboutButton{
cursor: pointer;
}
As mentioned in my comment, to be able to animate top (or other positions for that matter), you need to set a position: ... (e.g. position: relative;.
You could try using a different way to call your function, e.g. add this attribute to your link: `onClick(aboutMenu())
Also try putting an allcontent div around everything and animating that, body tags aren't that good for animations

using jQuery slideUp causes "jumpy" interface

On the demo link below, I am using jQuery slideUp and you will notice after it slides up, there is a quick jump of the content.
Do you know why this is? My html is valid (with the exception of the select option not having a label attribute..which I am still figuring out...). Do I have something positioned incorrectly?
http://demo.phppointofsalestaging.com/index.php
(Click login --> Sales -->Show Item Grid THEN Hide Item Grid to see the bug)
this inline style
<div style="margin-top: 39px;" id="content">
and line 724 of unicorn.css
#content {
...
margin-top: -39px;
...
}
... are conflicting with each other.
If you remove both, the page doesn't jump.
You have set a margin-top on the content div of 39px. This is only visible when you slide down the item grid. It seems to 'jump' when sliding back up because of this margin. Try setting the margin to 0px;
<div id="content" style="margin-top:0px;">
I played around a little bit and this is being caused by the margin-top:39px on your #content div, if you remove that and use top:39px instead of margin-top:39px on the #content element instead it doesn't jerk either - but it also causes the button to jump a bit on slideUp and slideDown so you will need to tweak the css of the button wrapper area like so:
To fix the button jumping issue:
#show_hide_grid_wrapper {
position: relative;
text-align: right;
padding: 10px;
}
As prev. answers mention, you have margin-top 39px on #content. Setting it to 0 will solve the problem, but it will also remove your beautiful dark gray section above the content. To get it back, add this to your CSS:
#content:before {
content: '';
display: block;
width: 100%;
height: 39px;
background: YOUR GRAY COLOR;
}

Make a div a link in JavaScript?

Everything I've searched for has shown about making a full div clickable, what I'm wondering is, is it possible to make a div in to a clickable link using just JavaScript and the div ID?
I have a layout of boxes and if a value in my database, I want PHP to echo some values in to JavaScript and say if this box is taken, give this div (boxID) the link that relates to it from the database. Only, there aren't going to be links on every div, as some won't exist in the database.
I suppose the alternative to this is wrapping each div in a <a> tag and an if exists statement?
In pure JS:
document.getElementById('your-div').addEventListener('click', function() {
location.href = 'http://your-url.com'
}, false);
By jQuery
$('#your-div').on('click', function() {
location.href = 'http://your-url.com'
});
you can easily make it so that when you click your div you go to another page, like this (using jQuery)
$('#myId').click(function () {
window.location = 'newurl.php';
});
In html5 you can just do:
<div>test</div>
This solution is for html <= 4. For html5, please read #Spencer solution.
Since the javascript is probably not what you want (waiting for extra comments), here's a example of how to do this in pure html/css. An anchor tag that fills completely a div, making that div clickable.
html:
<div>
<a href = "http://whatever.com/">
</a>
</div>
css:
div {
width: 200px;
height: 200px;
position: relative;
background-color: red;
}
a {
display: block;
width: 100%;
height: 100%;
position: absolute;
top: 0;
left: 0;
background-color: rgba(0, 255, 0, 0.5);
}
Demo in jsfiddle (background-color added for demonstration purposes):
http://jsfiddle.net/Gx3f5/

Icon to move when hovering over a menu button

Before you read this please get up this website to see what I am trying to do:
https://www.kris-willis.com
As you can see there is a RED arrow located below the menu and what it is that I'm trying to achieve is... when I hover over a menu button the arrow moves to the same button I'm hovering over without reloading the page.
Ideally I'd like the arrow to move back to a default button.. and also for the default button to change if clicked on a different menu button.
If you know any links to examples etc... I would really appreciate it!
Thank you for your time,
Kerry x
The first thing is that you have a wrong DOCTYPE.
<!DOCTYPE html PUBLIC "">
This causes you page to load in quirk mode. Change it to
<!DOCTYPE html>
for HTML5 or use the complete one including the FSI & FPI.
Second is you are using a <table> for navigation. Nothing seriously wrong with it but people tend to use ul
For the :hover, you can simply use
#MenuPosition table tbody tr td:hover
{
background-image: url("/images/Arrow.jpg");
}
You might have to play with paddings and margins or maybe use display: block or display: inline-block to position the arrow correctly.
Make the "buttons" anchors. Using css set create a rule for :hover to set a background image that contains the arrow.
There are plenty of CSS tutorials out there, Nettuts and Webdesigntuts have a lot of navigation articles. Or if you are comfortable with emulating others, find a site you like and pick apart the source until you figure out how they did it.
Keep in mind that javascript is not at all necessary to accomplish what you are doing. Unless you want some animations, and even then CSS can handle most of that work, pure CSS in my opinion is the better approach.
PURE CSS SOLUTION
Check this answer.
Is there any way to hover over one element and affect a different element?
So it might be:
#thething {
margin: 0;
}
.classone:hover + #thething {
margin-top: 10px;
margin-left: 10px;
}
If they're adjacent siblings in a parent div.
Just move the arrow bymargin-left with respect to left of the td DEMO
$("#Arrow").css({"margin-left":$(this).position().left+($(this).width()/2)-2});
Tp do this Add jQuery libirary to the head section of your page
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
Add this code in a external js file and add it to head section of your page
$(function(){
$("#MenuPosition").on("hover","td",function(){
$("#Arrow").css({"margin-left":$(this).position().left+($(this).width()/2)-2});
});
});
EDIT : For restoring the arrow orignal position use
$(function(){
currentPos = $("#Arrow").css("margin-left");
$("#MenuPosition").on("hover","td",function(){
$("#Arrow").css({"margin-left":$(this).position().left});
});
$("#MenuPosition").on("mouseout","td",function(){
$("#Arrow").css({"margin-left":currentPos});
});
});
NOTE : PLEASE SEE THE CALCULATION PART AND CORRECT IT.
PS: cant correct is because its my log out time from office ;) . but i thing you got the logic to do it
You can do something like this:
Using a span to add the bg arrow below the nav/menu lis in the HTML:
<ul class="nav">
<li>
Menu 1
<span class="arrow"> </span>
</li>
<li>
Menu 2
<span class="arrow"> </span>
</li>
</ul>
The CSS:
.nav {
font-size: anypx;
list-style: none outside none;
margin: 0;
padding: 0;
position: relative;
}
.nav li {
background: #whatev;
display: block;
float: left;
height: anypx;
line-height: anypx;
padding: 0;
text-align: center;
}
.nav li a {
color: #any;
display: block;
padding: any;
position: relative;
text-decoration: none;
width: auto;
}
.arrow {
background: url("images/arrow.png") no-repeat scroll 0 9px transparent;
display: none;
height: anypx;
text-indent: -9999px;
width: whatevs;
z-index: 9999;
}
And Finally the JS/Jquery that makes it work:
$(document).ready(function(){
Your_menu();
});
function Your_menu(){
$(".nav li").hover(function(){
$(this).find('.arrow').css({visibility: "visible",display: "none"}).show();
},function(){
$(this).find('.arrow').css({visibility: "hidden"});
});
}
Here is a site that is showing this :)
http://www.drexelmedicine.org/

onmouseover issue

I have a a link that calls a onmouseover javascript function that makes a div below it visible. Now this all works.
Now the problem is I have a a href link and when I mouse over the top part of it, it works perfectly but when I move my mouse overtop of the "now visible" div it blinks because html seems to think it is not off the div and then on it again so it keeps turning it off and on.
How could I stop this from happening? (html below, javascript is a simple function to make it visible, no point in posting, it works)
<a style="text-decoration:none;display:block;" onmouseout="ShowStock(1,0);" onmouseover="ShowStock(1,1);" href="">50</a>
<div id="stock1" style="visibility: hidden;">
<a style=" background-color:#009933; text-align:center;" name="1">1</a>
</div>
VIDEO OF IT HAPPENING: http://screencast.com/t/qjxHN4wyIc
The problem demonstrated in your video is that the stock1 div is stealing focus, which is then firing the onmouseout, closing the stock1 div, which then fires the onmouseover of the A tag, shows the stock1 div, which then steals focus, fires onmouseout of the A tag, etc...
The easiest thing to do is apply the same ShowStock onmouseout/onmouseover to the stock1 div as well, so that it "shows" itself while moused over, but hides itself when not moused over, except when you mouse over an area within the A tag that shows it.
For instance, this works perfectly (on jsfiddle.net, which also demonstrates a separate version with the error demonstrated in video):
a.hover {
background-color: #ccc;
width: 200px;
height: 200px;
position: absolute;
top: 15px;
left: 15px;
}
#show1 {
display: none;
width: 200px;
height: 200px;
position: absolute;
top: 75px;
left: 75px;
background-color: #daa;
}
function showTarget(target, state) {
switch (state) {
case 1:
state = 'block';
break;
default:
state = 'none';
}
target = 'show'+target;
document.getElementById(target).style.display = state;
}
<a class="hover" onmouseover="showTarget(1,1)" onmouseout="showTarget(1,0)">Test</a>
<div id="show1" onmouseover="showTarget(1,1)" onmouseout="showTarget(1,0)">Test Show</div>
Try to put the onmouseout event on the stock outsider element just the same way it is on the element "a" that has the onmousein event, and remove the onmouseout event of the original element.
This way it will just close when you get the mouse out of the stock element that has just appeared.

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