I am trying to make text adaptive using jQuery. Here is the fiddle:
http://jsfiddle.net/bq2ca7ch/
You can see a div with some text in it. The div doesn't have a specified height, and it's height is calculated from text height and 10% paddings on top and bottom.
I want font-size to be responsive. Let's say, div's original size was 124px, and font-size was 50px, so I want to keep this ratio. That means I need to know, what percent 50 is from 124. It is about 40.32 (50/124*100). That means that I need to set font-size to value, equal to container height/100 * 40.32. Here is the code I used:
function foo(){
var container = $(".box");
var containerHeight = $(".box").innerHeight().toFixed();
var neededSize = (containerHeight/100*40.32).toFixed();
container.css("font-size", neededSize + "px");
}
$(window).resize(foo);
$(document).ready(foo);
That seems to be working, but only when I resize the page. When I reload it, there is some different value. Why does the same function gives different values on resize and onload?
What i observed that Size changes because :
1. When you just reload .the function runs only once.
2.But when you resize , the function runs twice and changes the font size because the again calculations are done based on new height.
Main thing is on resize it is calculating wrong innerheight
See this:
function foo(jQuery ){
var container = $(".box");
var containerHeight = $(".box").innerHeight(true).toFixed(2);
var neededSize = (containerHeight/100*40.32).toFixed(2);
alert(containerHeight );
container.css("font-size", neededSize + "px");
}
$(window).resize(foo);
$(document).ready(foo);
Resize method is not reliable.
Code in a resize handler should never rely on the number of times the handler is called. Depending on implementation, resize events can be sent continuously as the resizing is in progress (the typical behavior in Internet Explorer and WebKit-based browsers such as Safari and Chrome), or only once at the end of the resize operation (the typical behavior in some other browsers such as Opera).
I tried with this , it worked for me both are giving the same result for me . try this container.css("font-size":neededSize + "px");
Related
I'm making a 2 block web page, 1 needs to be resizable using the resizable() function of jquery. when one is resized, the second block needs to change its width as well.
I use the following jquery code :
$(document).ready(function(){
$(window).bind('resize', function(){
var left_width = $(".left").width();
var right_width = $(".middle").width() - left_width;
$(".right").width(right_width);
});
$(".left").resizable();
});
the problem is, for some reason $(window).width() keeps changing and i cant assign the width to the right block correctly
Example
the problem
this is what comes up in the console when i log $(window).width() ,
sometimes its 1166 , sometime 1183.
The scroll bar is being displayed for a fraction of a second while resizing, slightly reducing the size of your window.
This seems to sometimes clash with when you calculate the new width of the second area, which reduces the width slightly.
Use Jquery .css.
$(document).ready(function(){
$(window).bind('resize', function(){
var left_width = $(".left").width();
var right_width = $(".middle").width() - left_width;
console.log(right_width);
console.log(left_width);
console.log('window ' + $(".middle").width());
$(".right").css("width",right_width+"px");
});
$(".left").resizable();
});
[EDIT] I misunderstood the problem but the difference is about right scroll of browser
The window size changing is due to the scrollbar appearing on the right of the browser window as $(window).width() calculates the size of the viewing area. My recommendation would be to change the overflow of the body to hidden whilst you are resizing the object. It seems to work on your Fiddle at least.
I have a function responsive that changes behaviour of certain elements on my website, including hiding popups etc. I call it in 2 cases:
$(document).ready(responsive);
$(window).resize(responsive);
The problem occurs on android chrome, as the virtual keyboard actually changes the height of the screen, and triggers responsive function, which closes my popups (some of them have text fields, making it impossible to type).
How can I prevent this from happening? I read somewhere a good point that android virtual keyboard only changes height of the screen, not a width, so I assume it would be a good idea to compare width before and after resize. So I created this function to compare the widths before and after and run resize() if width is different, but it doesn't work as expected, and console logs show different document widths even though I only changed the height of the screen (using chrome developer tools).
Any idea what went wrong or how can I prevent function responsive being launched on height change?
function resizeWidth() {
var existingWidth = $(document).width();
$(window).resize(function() {
var newWidth = $(document).width();
if (existingWidth != newWidth) {
$(window).resize(responsive);
console.log(existingWidth);
console.log(newWidth);
};
});
};
$(window).resize(resizeWidth);
Firstly you are attaching a handler to the resize event multiple times. One on load, then another every time the resize happens and resizeWidth is called. You should remove the handler within that function. Also, I guess you just want to call the responsive() function, not attach yet another resize handler when the width changes.
The main issue you have is that the scope of existingWidth is not low enough for it to be seen over multiple events. You could make it global, although that is generally considered bad practice. Instead you could use a data attribute, like this:
function resizeWidth() {
var existingWidth = $(document).data('resize-width');
var newWidth = $(document).width();
if (existingWidth != newWidth) {
responsive();
$(document).data('resize-width', newWidth);
};
};
$(window).resize(resizeWidth);
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.$container.find('.bar_bottom').height(sidebar_scrollable_height);
How do I go about getting what the height of an element on a page would be if it ignored the 'height' css property applied to it?
The site I'm working on is http://www.wncba.co.uk/results and the actual script I've got so far is:
jQuery(document).ready(function($) {
document.origContentHeight = $("#auto-resize").outerHeight(true);
refreshContentSize(); //run initially
$(window).resize(function() { //run whenever window size changes
refreshContentSize();
});
});
function refreshContentSize()
{
var startPos = $("#auto-resize").position();
var topHeight = startPos.top;
var footerHeight = $("#footer").outerHeight(true);
var viewportHeight = $(window).height();
var spaceForContent = viewportHeight - footerHeight - topHeight;
if (spaceForContent <= document.origContentHeight)
{
var newHeight = document.origContentHeight;
}
else
{
var newHeight = spaceForContent;
}
$("#auto-resize").css('height', newHeight);
return;
}
[ http://www.wncba.co.uk/results/javascript/fill-page.js ]
What I'm trying to do is get the main page content to stretch to fill the window so that the green lines always flow all the way down the page and the 'Valid HTML5' and 'Designed By' messages are never above the bottom of the window. I don't want the footer to stick to the bottom. I just want it to stay there instead of moving up the page if there's not enough content to fill above to fill it. It also must adapt itself accordingly if the browser window size changes.
The script I've got so far works but there's a small issue that I want to fix with it. At the moment if the content on the page changes dynamically (resulting in the page becoming longer or shorter) the script won't detect this. The variable document.origContentHeight will remain set as the old height.
Is there a way of detecting the height of an element (e.g. #auto-resize in the example) and whether or not it has changed ignoring the height that has been set for it in css? I would then use this to update the variable document.origContentHeight and re-run the script.
Thanks.
I don't think there is a way to detect when an element size changed except using a plugin,
$(element).resize(function() //only works when element = window
but why don't you call refreshContentSize function on page changes dynamically?
Look at this jsFiddle DEMO, you will understand what I mean.
Or you can use Jquery-resize-plugin.
I've got it working. I had to rethink it a bit. The solution is on the live site.
The one think I'd like to change if possible is the
setInterval('refreshContentSize()', 500); // in case content size changes
Is there a way of detecting that the table row has changed size without chacking every 500ms. I tried (#content).resize(function() but couldn't to get it to work.
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