I'd like to have a div (with class="top") come slide in from top:-300px; to top:40px; with some nice easing. I can't find any examples. Does anyone knows how to do this on load page?
Here's some JavaScript and CSS3:
The JavaScript:
<script>
document.getElementById("slide").style.top="40px";
</script>
And the CSS:
-webkit-transition:all 1s;-ms-transition:all 1s;-moz-transition:all 1s;-o-transition:all 1s;-webkit-transition:all 1s;
The element that would slide would have to have the id "slide". It would also need top have "position:absolute;top:-300px" in the CSS to make it -300px. You could also add "left:20%;" or something of the sort to the CSS to make it look better. Whatever works with your design.
You should look up about the CSS transition property. It's very nice for special effects. In this case, I made it take 1 second to slide. You could always change it.
This could also be implemented using jQuery, a JavaScript library, (which would take even less code), but I usually prefer regular JavaScript and CSS if I can help it.
Here's a demo of the code I wrote above: jsFiddle.
Oh, and PLEASE mark this question as the answer if it helped you. It will give me privileges and earn me more reputation.
Hope this helped!
Related
I'm trying to make a two-lines menu with bootstrap 4, and I found some examples on the web:
https://www.codeply.com/go/DpHESPqZsx
https://www.codeply.com/go/cxXqBnGrPx
In the first example they use "div class='navbar'" to create the menus.
<div class="navbar">...</div>
In the second example they use "nav class='navbar'" to create the menus.
<nav class="navbar">...</nav>
Which is the correct way? Which one should be used?
I have another question. Why do they NOT use the bootstrap grid with the rows and columns? When should you use it?
Thank you very much
Div and nav are similar element, in terms of what they do. However, nav is better in this situation because you want to have semantic markup. It is because of SEO and more readable for developers.
And why they are not using grid is probably because they haven't implemented it yet and should be coming. Their grid system is done with flex currently, but should change. And CSS Grid does not work that great with IE11.
You should use Grid when you feel that it will be easier to structure your site. It's a great tool, and combine it with Flex is so easy and comfortable
The difference is that a div has no meaning and a nav Element has a semantic meaning (indicating that there is a navigation). You can remove every div and span from a website and have no difference about the semantic structure of a page, every other element has a meaning: For example, states that there is the main content, says here is the header-part of the site.
These parts tell for example search engines what's on a site. So if you have the text "Stackoverflow" in your Element somewhere, google (and other search engines) know that you have a stackoverflow link in your navigation. If you have it in your Tag, you probably have a text about stackoverflow.
Keep in mind: These are some simplified examples.
The html5 nav tag has semantic meaning.
Please follow the Bootstrap docs. The grid (row>col) should not be used in the Navbar as it's not a supported component. Using the grid inside the Navbar will through off alignment, spacing and the responsive behavior controlled by the navbar-expand-* classes. I'm the author of both Navbar examples from Codeply you posted.
Question: Is there a easy way to detect the browser of the user ?
Details: I would like to change for example the value of background-color of body. I've already see something like <!--[if !IE]>.
Edit:
Okay, I agree, browser detect is bad (Link taken from #TylerH), and should not be used. Thank I take note. And If someone really still want to use them, I've found a good website with a list of browser detection hack.
I think there is no way to do it with HTML or CSS (I don't like hacks).
But you could check the user agent string with JS.
See here: How to make CSS visible only for Opera
I am trying to create an interactive map where users can click on different provinces in the map to get info specific to that province.
Example:
archived: http://www.todospelaeducacao.org.br/
archived: http://code.google.com/p/svg2imap/
So far I've only found solutions that have limited functionality. I've only really searched for this using an SVG file, but I would be open to other file types if it is possible.
If anyone knows of a fully functioning way to do this (jQuery plug-in, PHP script, vector images) or a tutorial on how to do it manually please do share.
jQuery plugin for decorating image maps (highlights, select areas, tooltips):
http://www.outsharked.com/imagemapster/
Disclosure: I wrote it.
Sounds like you want a simple imagemap, I'd recommend to not make it more complex than it needs to be. Here's an article on how to improve imagemaps with svg. It's very easy to do clickable regions in svg itself, just add some <a> elements around the shapes you want to have clickable.
A couple of options if you need something more advanced:
http://jqvmap.com/
http://jvectormap.com/
http://polymaps.org/
I think it's better to divide my answer to 2 parts:
A-Create everything from scratch (using SVG, JavaScript, and HTML5):
Create a new HTML5 page
Create a new SVG file, each clickable area (province) should be a separate SVG Polygon in your SVG file,
(I'm using Adobe Illustrator for creating SVG files but you can find many alternative software products too, for example Inkscape)
Add mouseover and click events to your polygons one by one
<polygon points="200,10 250,190 160,210" style="fill:lime;stroke:purple;stroke-width:1"
onmouseover="mouseOverHandler(evt)"
onclick="clickHandler(evt)" />
Add a handler for each event in your JavaScript code and add your desired code to the handler
function mouseOverHandler(evt) {};
function clickHandler(evt) {};
Add the SVG file to your HTML page (I prefer inline SVG but you can use linked SVG file too)
Upload the files to your server
B-Use a software like FLDraw Interactive Image Creator (only if you have a map image and want to make it interactive):
Create an empty project and choose your map image as your base image when creating the new project
Add a Polygon element (from the Shape menu) for each province
For each polygon double click it to open the Properties window where you can choose an event type for mouse-over and click,
also change the shape opacity to 0 to make it invisible
Save your project and Publish it to HTML5, FLDraw will create a new folder that contains all of the required files for your project that you can upload to your server.
Option (A) is very good if you are programmer or you have someone to create the required code and SVG file for you,
Option (B) is good if you don't want to hire someone or spend your own time for creating everything from scratch
You have some other options too, for example using HTML5 Canvas instead of SVG, but it's not very easy to create a Zoomable map using HTML5 Canvas,
maybe there are some other ways too that I'm not aware of.
Just in case anyone will search for it - I used it on several sites, always the customization and RD possibilities were a perfect fit for what I needed. Simple and it is free to use:
Clickable CSS Maps
One note for more scripts on a site: I had some annoying problems with getting to work a map (that worked as a graphic menu) in Drupal 7. There where many other script used, and after handling them, I got stuck with the map - it still didn't work, although the jquery.cssmap.js, CSS (both local) and the script in the where in the right place. Firebug showed me an error and I suddenly eureka - a simple oversight, I left the script code as it was in the example and there was a conflict. Just change the front function "$" to "jQuery" (or other handler) and it works perfect. :]
Here's what I ment (of course you can put it before instead of the ):
<script type="text/javascript">
jQuery(function($){
$('#map-country').cssMap({'size' : 810});
});
</script>
Go to SVG to Script
with your SVG the default output is the map in SVG
Code which adds events is also added but is easily identified and can be altered as required.
I have been using makeaclickablemap for my province maps for some time now and it turned out to be a really good fit.
I had the same requirements and finally this Map converter worked for me. It is the best plugin for any map generation.
Here is another image map plugin I wrote to enhance image maps: https://github.com/gestixi/pictarea
It makes it easy to highlight all the area and let you specify different styles depending on the state of the zone: normal, hover, active, disable.
You can also specify how many zones can be selected at the same time.
The following code may help you:
$("#svgEuropa [id='stallwanger.it.dev_shape_DEU']").on("click",function(){
alert($(this).attr("id"));
});
Source
You have quite a few options for this:
1 - If you can find an SVG file for the map you want, you can use something like RaphaelJS or SnapSVG to add click listeners for your states/regions, this solution is the most customizable...
2 - You can use dedicated tools such as clickablemapbuilder (free) or makeaclickablemap (i think free also).
[disclaimer] Im the author of clickablemapbuilder.com :)
<script type="text/javascript">
jQuery(function($){
$('#map-country').cssMap({'size' : 810});
});
</script>
strong text
VisualForce pages can have the format:
<apex:page standardController="Case" >
<div id="content"></div>
<script>
... javascript to render a UI into #content ...
</script>
</apex>
which means it can appear on the "Case" layout. If you want a generic VisaulForce page (appearing all alone on a tab, let's say) you can remove the standardController parameter:
<apex:page>
...
</apex>
Is there a way to specify that a single VisualForce page can appear anywhere? (In our case, it's a javascript utility which is not layout-dependent).
I'm new to SalesForce, and the closest I could come up with would be to dynamically populate the standardController field (if that is supported) but I feel there must be a better way. Any help is greatly appreciated!
Do you mean it's a piece of javascript you can include in other pages? If so you should be doing it as a component, or you could put the JS in a static resource and include that in your pages.
If it's actually a page, you can include it in a page layout as well, though it's a little clunky and goes in an iFrame so that would probably cause problems for you.
At the top of many pages in our web application we have error messages and notifications, 'Save' and other buttons, and then our h1 tag with the content title. When making a web application accessible, is it ever acceptable to have content above the top-level structure tag like we do here?
As a screen reader user I don't like content above the main heading. Normally I navigate by headings so would miss the error message. A better solution is to output an h1 heading above the error message, then leave the rest of your headings in tact giving you two h1 headings.
Yes (you can put stuff above them). The H simply means Heading. It's a question of what the heading relates to I guess.
My only caveat is, H2 shouldn't really be above H1, and H3 Shouldn't be above H2. But I don't think it's an actual rule.Websites have menus, warning, notifications. It's acceptable to put them above the rest of your content. I don't see how it would affect accessibility as long as your content is ordered logically. Look at the page CSS turned off. Does it look logical? That's the most important part of accessibility.
Although some people do go that extra mile and have the menu as the last item in the markup and use CSS to bring it back to the top. Personally, I find that solution counter productive. The menu is still important, it belongs at the top of the page.
Yes, just consider it is in that order that the user will get the information. So, if you just did an operation it sounds like a good idea to get any message related to it as the first thing. If it is a notification that appears on any page unrelated to what you are doing, I wouldn't put it above, as it might be a little weird.
Also you can use a text browser that doesn't use styles, it should look like a document with appropriate headers.
Heading tags are used to indicate the hierarchy of the content below it. You should only have one h1 tag and it should be the first content to appear on your page (this is usually the name of the site). Also, you shouldn't skip heading tags when drilling down through different tiers of content.
In your case, you can still use CSS to position items above the h1 tag as long as it is in the correct order in the html.
I assume the elements above the heading are used by JavaScript. In that case, it's preferable if they are created by JavaScript, not included in the source of the page.
To return to your original question, it is probably best that they be at the foot of the page. However, if they are hidden using the CSS "display: none;" or "visibility: hidden;" properties then they will not be seen by most (perhaps all?) screenreaders or by many other assistive technologies, and so should not be an issue. I've written a fairly detailed explanation of why accessibility technology ignores such elements.
Of course if somebody disables CSS things are going to look pretty messy. If there is content on the page that can be used even when CSS and/or JavaScript are disabled, then putting those elements at the bottom of the page will at least make things less cluttered.