Develop Reference

Getting the correct client height of an external SVG when it loads in Chrome

I'm wanting to tie the height of a button to the height of an external SVG after it's been resized by a browser.
Jsfiddle is here.
Here's the script:
function svgLoad() {
"use strict";
this.wrapper = document.getElementById('wrapper');
this.navID = document.querySelector('#slideMenu');
this.menuButton = document.querySelector('#menuButton');
this.logo = document.getElementById('logo');
this.logoWrap = document.getElementById('logoWrap');
this.navBar = document.getElementById('navBarWrap');
console.log(this.logo);
console.log(this.logo.clientHeight);
console.log(this.navBar.clientHeight);
this.loaded = function() {
this.logoHeight = Math.round(this.logo.clientHeight);
this.rect = this.logo.getBoundingClientRect();
console.log(this.rect.height);
console.log(this.logoHeight);
console.log(this.navBar.clientHeight);
// Sets height of menu button to match height of logo.
this.menuButton.style.height = this.logoHeight + 'px';
console.log(this.menuButton.style.height);
this.wrapper.style.marginTop = this.navBar.clientHeight + 'px';
}.bind(this);
this.logo.onload = this.loaded;
}
new svgLoad();
If I use window.onload everything displays fine, but I'd prefer the script to run once the SVG is ready. If I try running when the SVG object is loaded, I get different results across browsers.
Everything works fine in FF and Edge/IE using onload/addEventListener on the SVG.
In Chrome it it won't work at all, it consistently reports the SVG's size as 160px. It's showing the SVG as an anonymous function in the console, and within that the client height is calculated correctly; It just won't apply it to the script (possibly worth noting it reports the same height in the fiddle even though it doesn't load the SVG at all in Chrome).
Edit - having looked into this a bit more, Chrome seems to be changing the SVG's offsetTop property to make up the difference between the height it should dsisplay at and 160px.

I've playing with this and found an answer.
FF and IE/Edge will resize the SVG properly without either width or height specified on the object. Chrome requires that a height is specified before it sends the correct client height to the script.
For my purposes using rem/em was the best solution.

jQuery Change top value on scroll

I am hoping to create an effect similar to this one further down the page, in the 'Designing For 20-Somethings' section.
The effect is essentially to get a long image to change the css top value within a device such as a MacBook or iPhone, so it appears as though the image within the device is also scrolling whilst the user is scrolling the website.
I've created a fiddle to show how far I've got, but this doesn't work well on resize or when initially loaded.
This is some of the code I am using below
var yOffset = $element.offset().top - ($(document).scrollTop() + $(window).height()/diviser)
Any help is appreciated.

OK I see it now. But the movement is so subtle i didn't even notice it. It looks to be a lot of work for something that is pretty much unnoticeable. It appears he's changing the top position of the image based on some percentage change of the full window scroll but only when the image is inside the viewport.
Just off the top of my head (completely untested) something like this would scroll the image up and 1/4 the speed the window would scroll;
var mobiletop = $('.mobile').position().top;
var scrollfactor = 4;
$(window).scroll(function(){
if($(window).scrollTop() > mobiletop){
var imgtop = $('.mobile img').position().top - (($(window).scrollTop() - mobiletop)/scrollfactor);
$('.mobile img').css('top', imgtop + 'px');
}

Set large value to div's height

I have a problem with height limitation of <div></div> in some web browsers, like Firefox. I have javascript code like this:
$('#MyDiv').css("height","20000000px"); // 20,000,000 pixel height
But I see height: 2e+7px; rule in the firebug. This problem exist in IE too, But in google chrome everything is ok and I see height: 20000000px;. How can I set very large value to div's height in a way that works for most browsers?
EDIT: firefox has no scrollbar in this div, but google chrome has scrollbar.

I want just confirm the problem which describes hamed. One can try the demo http://jsfiddle.net/OlegKi/y4tLxx53/4/ which contains setting height property using jQuery.css on the test div:
var testValues = [10000, 1533916, 1533917, 1533918, 10737418, 10737419,
17895696, 17895697, 17895698, 20000000], h, i;
for (i = 0; i < testValues.length; i++) {
h = testValues[i] + "px";
$("#test").css("height", h);
$("#log").append("<span>After setting height " + h +
", one have height: " + $("#test").css("height") +
"</span><br/>");
}
with very simple HTML markup
<div id="log"></div>
<div id="test"></div>
One can see in Google Chrome the expected results
but Firefox shows
and IE10 and IE11 displays
instead.
By the way, the setting of large height on divs will be used to implement "virtual scrolling" (for example in jqGrid). So that the user sees div with large scroll and a table inside. If the user uses scroll bar then the page of data will be downloaded from the server via Ajax. In the way the height of the div should corresponds to the size of data on the server. If one row of table data have height 23px, then IE10/IE11 can simulate in the simple way only 66692 rows of virtual data in IE (1533916/23=66692) and 778073 rows (less as a million rows) in Firefox. The demos shows that one need use more sophisticated implementation of "virtual scrolling" to have no, described above, problems with setting of height of div.
One can use the same inline demo alternatively:
var testValues = [10000, 1533916, 1533917, 1533918, 10737418, 10737419,
17895696, 17895697, 17895698, 20000000], h, i;
for (i = 0; i < testValues.length; i++) {
h = testValues[i] + "px";
$("#test").css("height", h);
$("#log").append("<span>After setting height " + h +
", one have height: " + $("#test").css("height") +
"</span><br/>");
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<div id="log"></div>
<div id="test"></div>

I have run into the same issue implementing virtual scrolling. My solution is to detect numbers that are too large and use a multiplier.
This means that the height of the overflowed content will be realHeight / multiplier. And when I'm trying to figure out what data to show, I just take the scrollTop * multiplier. This works fine to the user because the scrollbar has a minimum height.
This will work if you have control over the effect. I'm not familiar with jqGrid, but the source code may have to be updated.

That's not a problem. The value 2e+7 is the same as 20000000, it's just a different way of showing the number.
In some tools, large numbers are shown in scientific notation. The number 2e+7 means 2 * 107.

If your document is size is not fixed, you can use this:
var height = $(document).height();
and set your div container height accordingly
$('#MyDiv').css("height",height);
This should work on all the browsers

Calculating Height of Sidebar Dynamically

I'm trying to work out the algorithm for a fixed div that grows in height (while scrolling) until it's equal to the height of the viewport or div with fixed position relative to another div and the bottom of the viewport
I am using Twitter Bootstrap affix to lock my secondary navigation bar (yellow) and my sidebar (black) to the top of the screen when the user scrolls that far. 
This works fine. The sidebar is the piece that's giving me trouble.  When it is in its in its starting position (as shown in the diagram belorw), I want the top of the bar to sit 30px
down from the secondary navigation bar (yellow) and 30px up from the bottom of the page. 
As the user scrolls, the bar should grow in height so that it remains 30px beneath the secondary navigation bar and 30px above the bottom of the screen (As shown in the diagram below)
After the bar is fixed position, I am able to do what I need to do.  
.sidebar { 
position:fixed;
top:100px;  
bottom:30px;
left:30px;
}
What I can't figure out is how to position the TOP of the sidebar relative to my
secondary navigation bar and the BOTTOM of my sidebar relative to the bottom
of the screen. I've tried calculating the height of the sidebar at the beginning and the end of the
scroll but this causes issues.
I've also tried calculating the final height of the sidebar and letting the bottom of
the sidebar just run off the edge of the screen (when it's in its initial position), but
if there's not enough content on the right side to warrant scrolling, I have no way
of getting to the bottom items in the scroll bar.  Plus my screen starts bouncing
in a really un­attractive way.
below is the current code in use:
ShelvesSideBar.prototype._resize_sidebar = function(_this) {
var PADDING = 50;
var window_height = $(window).height(),
nav_bar_height = $('.nav_bar').height() + $('.secondary_tabs').height(),
sidebar_height = window_height - nav_bar_height - PADDING,
sidebar_scrollable_height = sidebar_height - $('.bar_top').height();
_this.$container.height(sidebar_height);
_this.$container.find('.bar_bottom').height(sidebar_scrollable_height);
/* reset the nanoscroller */
_this.$container.nanoScroller();
};
   
this code is called on page load and again on window resize. Any help would be greatly appreciated!

I've been trying to do something similar (minus the fixed elements and navbars). What I found was in order to do any sort of relative height scaling every element above the element I wished to scale all the way up to the opening html tags had to have a relative height set, even if it was just height:100%;. (here's my original question Variable height, scrollable div, contents floating)
My goal was to have the body height fixed to window size like a native full screen application would be with my content subareas scrolling, so this is a bit off topic for what you're wanting to accomplish. But I tried using JS/JQ to start off with as you're trying to do currently and found that I simply couldn't get the window height because the default behaviour for height management is to expand the page height until everything on the page fits. And all the getHeight methods I tried we're getting the page height not window/viewport height as promised. So you may wish to try fixing your body's height to the window and going from there using overflow:scroll; to scroll the page.
A quick note on overflow:scroll; if you have users who use WP8 IE (and probably other versions of IE) it may be advantageous to implement FTscroller to handle all your scroll elements as the overflow property defaults to hidden and is a fixed browser property. The only problem with FTscroller is because it uses CSS offsets to move the content container it may wreak havoc on elements that are designed to switched to fix when they reach x height from top of page because technically the top of page (or rather the top of the container they're in) isn't at the top of the page anymore it's beyond it. Just something to be aware of if you do need to cater for this browser.
And apologies for the complexity of my sentence structure. :/

so I was able to figure this out, for anyone still looking. What I ended up doing was binding to the window scroll event and - whenever the scroll occurred - I check if the class "affix" has been added to the sidebar. If it has, then I perform one set of calculations to determine sidebar height. Otherwise, I perform the other set of calculations. Code below:
/* called on window scroll */
var PADDING = 70;
var window_height = $(window).height(),
nav_bar_height = $('.nav_bar').height() + $('.secondary_tabs').height(),
header_height = $('.prof_block').height() - nav_bar_height,
sidebar_height = _this.$container.hasClass("affix") ? window_height - nav_bar_height - PADDING : window_height - (header_height + nav_bar_height) - PADDING,
sidebar_scrollable_height = sidebar_height - $('.bar_top').height();
_this.$container.height(sidebar_height);
_this.$container.find('.bar_bottom').height(sidebar_scrollable_height);

A bit of problem with implementing a modal dialog

I am developing a modal dialog as a part of a web application. There is one thing that's been of a puzzle to me. Please watch a movie clip that I just uploded at http://inter.freetzi.com/example/. I feel strongly that I have to accompany my question with a video because this is the case when it's better to see once, than to hear 100 times.
(It could be vertical scrolling, or both vertical and horizontal at the same time. But I am using horizontal scrolling in my example, so watch for it.)
Here's about my question:
Width of the transparent mask affects the width of the page itself. But in Opera, for exemple, every time the window gets resized, the page gets width that is at most close to 'true'. While in IE, once the transparent mask has affected the width, afterwards the page remembers it and stays with it. What is the problem and how to settle it? How to make IE behave the way Opera does?
In my project, I do the following:
//curViewpointW and curViewpointH are current width and height of the viewpoint (current is meant to be the moment of the resize event)
oMask.style.width = curViewpointW + 'px';
oMask.style.height = curViewpointH + 'px';
var pageWH = getPageWH(); //getPageWH() is a function that gets current width and height of the page (with scrolling if there is any)
var curPageW = pageWH[0];
var curPageH = pageWH[1];
if (curPageW > curViewpointW) {
oMask.style.width = curPageW + 'px';
}
if (curPageH > curViewpointH) {
oMask.style.height = curPageH + 'px';
}
But IE ignores that somehow...
P.S. It's jQuery in my example, so many of you may have used its dialog before.

Have you looked into setting an onresize event handler that will adjust your mask dimensions when the window is resized? If you are using Prototype, you can set up such a handler unobtrusively like this:
Event.observe(document.onresize ? document : window, "resize", function() {//dostuff});
courtesy of the Roberto Cosenza blog