I've got a page that is 1200px wide (but this can change). I've got a viewport that I can't change that is:
<meta name="viewport" content="initial-scale=1, width=device-width">
I'm trying to write a script where, if you come to the page with a device that is more than 601px wide and less than 1025px wide the screen will zoom out to the page width. Currently the device will load the page and show the first 768px then the user has to zoom out to see the remaining 1200px.
This is somewhat what I want:
if(window.innerWidth > 600 && window.innerWidth < 1024){
var defaultDeviceWidth = window.innerWidth;
var defaultPageWidth = document.getElementById('wrapper').offsetWidth;
if(defaultDeviceWidth < defaultPageWidth){
document.querySelector('meta[name="viewport"]').content = 'initial-scale='+
(defaultDeviceWidth/defaultPageWidth)+
', maximum-scale='+(defaultDeviceWidth/defaultPageWidth)+
', user-scalable=yes';
}
}
Which will output:
<meta name="viewport" content="initial-scale=0.64, maximum-scale=0.64, user-scalable=yes">
Problem with this is, maximum-scale zooms the view out but doesn't allow the user to zoom in if they want to.
Essentially:
I want tablets to zoom out to the page limits, as if you did the pinch out as far as it'll go using javascript.
I think one popular method to best fit the website layout for viewers from all devices are through the use of responsive classes (media queries, bootstrap, jquery-mobile, etc. )
Other ways to load dynamic CSS styles can be using refresh trigger to load specific *.css in different device resolutions.
Have you thought about using dynamic if-else to echo different viewport meta tag once you detected the device width in advance before converting to HTML and show in client side?
Related
For some reason anything my company tries to share on LinkedIn will post but the image will not load. Whether that is any images on the page or the Open Graph image that is specified for that page. I also understand that LinkedIn has a 7-day cache for images like this, but this has been ongoing for over a month now.
Here's an example: http://knowgreaterpartnership.com/100-days-in-a-minute/
<html lang="en-US" prefix="og: http://ogp.me/ns#">
<meta property="og:type" content="article" />
<meta property="og:title" content="100 Days in a Minute" />
<meta property="og:description" content="Each week for the next 100 days, Buchanan's government relations professionals and attorneys will bring you 100 Days in a Minute, offering brief insights on President Trump's legislative and regulatory changes that will impact your business." />
<meta property="og:url" content="http://knowgreaterpartnership.com/100-days-in-a-minute/" />
<meta property="og:image" content="http://knowgreaterpartnership.com/wp-content/uploads/2017/01/100days-seo-facebook.jpg" />
When anyone tries to share this URL, the hyperlink will come up but no image. Now this page also has Open Graph meta tags to specify which image is shared. The image URL is valid and works on both Twitter and Facebook, but not here on LinkedIn.
One workaround I know we can do is to X out of the blank image after pasting the URL and uploading a custom image. However, when doing this from our company's page this feature blocks any further adjustments to the post where we can tag any # names associated with the post.
Any help would greatly be appreciated.
Thanks
Couple of things to check:
The dimensions 1600x900 and size of 220kb are within LinkedIn's requirements. However, your aspect is 16:9 instead of 4:1 / 1:4.
Max file size: 1 MB
Minimum image dimensions: 80 x 150 pixels
Recommended aspect ratio: 4:1 or 1:4
Making Your Website Shareable on LinkedIn
Your image URI is https, it could be they are unable to retrieve your image. Have you tried with an http image?
Note: If the image meets the requirements, but it still does not
appear in updates on LinkedIn, your website may be blocking us from
pulling the image or the image may be located on a protected directory
or website.
Making Your Website Shareable on LinkedIn
Was the image change from the first time LinkedIn crawled your page for the image? They do cache for ~7 days.
The first time that LinkedIn's crawlers visit a webpage when asked to
share content via a URL, the data it finds (Open Graph values or our
own analysis) will be cached for a period of approximately 7 days.
This means that if you subsequently change the article's description,
upload a new image, fix a typo in the title, etc., you will not see
the change represented during any subsequent attempts to share the
page until the cache has expired and the crawler is forced to revisit
the page to retrieve fresh content.
Shared Content Caching
I know for Google Shopping (or whatever it's called now) it's recommended providing the URL to the highest quality image there is for the product. Does that same principal apply for Product rich snippets?
Although it's rendered on the product page, I can easily provide the URL to the high-res image like this:
<meta itemprop="image" content="/img/high-res.jpg"></meta>
Or I can just tag itemprop="image" to one of the lower quality images that is shown on the website? But it's only 400 x 400px, compared to high-res which is 2000 x 2000px.
Any thoughts?
For some Rich Snippets (including the Product Rich Snippet), Google does not recommend any image dimensions, for others, they specify
at least 160x90 pixels and at most 1920x1080 pixels
(taken from my answer on Webmasters SE)
If you want to provide an image URL without showing the image, you must use link instead of meta:
<link itemprop="image" href="/img/high-res.jpg" />
(Side note: The meta element has no closing tag </meta>.)
I'm developing a web browser on Android and want to show the URL logo for the most visited sites like in Chrome (4 X 2). But the problem is that most favicons (eg: http://www.bbc.co.uk/favicon.ico) are of size either 16X16 or 32X32 and they don't look good when scaled up.
Is there a way I can download a high resolution icon/bitmap for an URL in a standard way? How about opening the home page and then extracting all the image links and then choose an image with the name logo in it? Would this method work for all the URLs? I want to know if there is a standard way to obtain a high resolution icon for a given URL or favicon is the only standard way to get the website logo?
You can code it yourself or use an existing solution.
Do-it-yourself algorithm
Look for Apple touch icon declarations in the code, such as <link rel="apple-touch-icon" href="/apple-touch-icon.png">. Theses pictures range from 57x57 to 152x152. See Apple specs for full reference.
Even if you find no Apple touch icon declaration, try to load them anyway, based on Apple naming convention. For example, you might find something at /apple-touch-icon.png. Again, see Apple specs for reference.
Look for high definition PNG favicon in the code, such as <link rel="icon" type="image/png" href="/favicon-196x196.png" sizes="196x196">. In this example, you have a 196x196 picture.
Look for Windows 8 / IE10 and Windows 8.1 / IE11 tile pictures, such as <meta name="msapplication-TileImage" content="/mstile-144x144.png">. These pictures range from 70x70 to 310x310, or even more. See these Windows 8 and Windows 8.1 references.
Look for /browserconfig.xml, dedicated to Windows 8.1 / IE11. This is the other place where you can find tile pictures. See Microsoft specs.
Look for the og:image declaration such as <meta property="og:image" content="http://somesite.com/somepic.png"/>. This is how a web site indicates to FB/Pinterest/whatever the preferred picture to represent it. See Open Graph Protocol for reference.
At this point, you found no suitable logo... damned! You can still load all pictures in the page and make a guess to pick the best one.
Note: Steps 1, 2 and 3 are basically what Chrome does to get suitable icons for bookmark and home screen links. Coast by Opera even use the MS tile pictures to get the job done. Read this list to figure out which browser uses which picture (full disclosure: I am the author of this page).
APIs and open source projects
RealFaviconGenerator: You can get any web site favicon or related icon (such as the Touch Icon) with this favicon retrieval API. Full disclosure: I'm the author of this service.
BestIcon: Although less comprehensive, Besticon offers a good alternative, especially if you want to host the code yourself. There is also a hosted version you can use right away.
The Go code at https://github.com/mat/besticon tries to solve this problem.
For example
$ besticon http://github.com
http://github.com: https://github.com/apple-touch-icon-144.png
There is also an accompanying hosted version of the code, see for example http://icons.better-idea.org/icons?url=github.com.
(Disclaimer: I wrote it because I needed to solve the same problem a while ago.)
another option is getting favicons from any domain using a hidden google API
the favicon link pattern will be
https://www.google.com/s2/favicons?domain={domain}&sz={size}
for example
https://www.google.com/s2/favicons?domain=stackoverflow.com&sz=64
Logos are not going to be consistently named and very difficult to identify consistently. Consider putting the favicon on a colour tile of suitable dimensions. People will quickly associate the colour with the website. You could either extract a dominant colour from the website or favicon using something like colorthief, or make each one unique using a golden angle formula to choose a hue.
Here is a new and genuine solution which will always give you the best results-
Webchromeclient gives a callback of onReceivedTouchIconUrl method for all the websites just hold the url from here.
Next step is to convert this url to bitmap which can be done like this-
try {
URL url = new URL(touchiconUrl);
HttpURLConnection connection =
(HttpURLConnection)url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
Next step is to send this bitmap for the shortcut.
Note: Remember to create bitmap on background thread like asynctask.
This HTML document requires a base url and the HTML/"View Page Source" of the web page and should output the values.
<!doctype html>
<input type=text placeholder=URL><br>
Place "View Page Source" of HTML homepage<br>
<textarea id=HTML placeholder="HTML content of webpage">
</textarea><br>
<input type=Submit>
<script>
function url(u,n){
try{
u = u.getAttribute(n);
}
catch(e){
return 'null';
}
if(u.slice(0,2) == "//"){
u = "http:"+u;
}
else if(u.slice(0,1) == "/"){
u = u.slice(0,1);
}
return '<img src="'+u+'">';
}
document.querySelector('input[type=Submit]').onclick = function(){
var output = '';
var HTML = document.getElementById('HTML').value;
var doc = document.implementation.createHTMLDocument("New Document");
doc.documentElement.innerHTML = HTML;
output = output + "apple-touch-icon<br>"+url([].slice.apply(doc.querySelectorAll('link[rel="apple-touch-icon"]')).reverse()[0],'href')
// deprecated output = output + "apple-touch-icon-precomposed<br>"+url([].slice.apply(doc.querySelectorAll('link[rel="apple-touch-icon-precomposed"]')).reverse()[0],'href')
output = output + "<br>image/png<br>" + url(doc.querySelectorAll('link[rel="icon"][type="image/png"]')[0],'href');
// <meta name="msapplication-TileImage" content="/mstile-144x144.png">
// deprecated output = output + "<br>msapplication-Ti:<br>"+ url(doc.querySelectorAll('link[name="msapplication-TileImage"]')[0],'content');
// <meta name="msapplication-config" content="/browserconfig.xml/ ">
//output = output + "<br>msapplication-con: "+ url(doc.querySelectorAll('meta[name="msapplication-config"]')[0],'content');
// <meta property="og:image" content="http://somesite.com/somepic.png"/>
output = output + "<br>og:image<br>" + url(doc.querySelectorAll('meta[property="og:image"]')[0],'content');
// <link rel="image_src" href="https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-icon.png?v=c78bd457575a">
output = output + "<br>image_source<br>" + url(doc.querySelectorAll('link[rel="image_src"]')[0],'href');
var URL = window.location.hash;
document.getElementById('output').innerHTML = output;
};</script>
<div id=output></div>
If you would like to automate the retrieval of the HTML you could use something like the following for PHP.
<? echo file_get_contents($_GET["url"]);
Usually favicon is small (like 16x16 or 32x32). If you need bigger dimensions, extract not favicon, but logo from homepage/header.
Rather than add Pin It buttons through our site, I would like to simply control what images show up in Pinterest's "Find Image" results if a user decides to pin one of our URLs.
As of now, "Find Images" allows the user to scroll through the images it finds on the page so they can select which image to pin. The "found" images start with the first jpg in the html file, I'm assuming (could that be a bad assumption??). On our site, this forces a user to scroll through about 15 navigation and promotion images before arriving at the featured product image. Is there any way to specify this image to show first in those results? Maybe through a meta tag, or by adding a class or id to the element?
Without a public Pinterest API, this seems like just guesswork, but I wanted to see if anyone else has run into this, or solved this. Thanks.
A lot of search results including the Pinterest Help Center talk about using nopin in HTML elements, which is invalid HTML. What they don't document is a data attribute to the same (well formed) effect.
<img src="foobar" data-pin-nopin="true" />
Adding the nopin attribute will exclude the image from appearing on Pinterest:
<img src="..." nopin>
I solved this by simply loading the image before all others in the page. In this case, I gave it width="0" and height="0" (you could also give it style="position: absolute; left: -9999px; top: 0;" just to be sure).
This won't break the page layout, but will force Pinterest to find this image first. The only downside is that the browser will load the page a few milliseconds slower, but if you're reusing this image later in the page anyway, you should make up for lost time then.
Pinterest will find any images from <img> tags (it will ignore CSS background images) that are at least 80px x 80px.
The order the images show up on in the Pinterest list is determined by the order they are specified in the HTML.
As you have discovered, you can alter the CSS of an image to "hide it" without actually hiding it by either moving it off the page with absolute positioning or 0 height and width. Any images that are set to display: none will not be picked up by Pinterest.
You can instruct the share preview to only grab specific images from the page by using the “image_include” configuration option. First, set image_include to your desired class name (id selectors are not allowed, only class selectors), then add that same class name to each of the images on the page that should be grabbed. For image_include, don’t add the ‘.’ selector. Here’s an example:
<script type="text/javascript">
var addthis_config = {
image_include: "at_include"
}
</script>
Once image_include has been defined with a class, add that class to the desired images on the page. In this example, the only images on the page that will be grabbed, will be the images with the at_include class (img1.jpg and img3.jpg).
<img src="http://www.example.com/img1.jpg" class="at_include" />
<img src="http://www.example.com/img2.jpg" />
<img src="http://www.example.com/img3.jpg" class="at_include" />
I was reading this blog which suggests the following:
Use the global no pin flag to prevent pinning on the whole site
Manually add the Pin It widget to those images you want to make pin-able.
Given Pinterest's webmaster tools appear to only have a blacklist, rather than a whitelist option (that you are seeking), this could be a possible solution. Another stated benefit of this is you can also supply suggested pin text through the Pin It widget.
Only downside to this I guess is that it may break the user's own Pin tools. Pinterest does allow you to supply a custom "denied" message, so I guess you can say "please use our site's pin buttons directly".
I've tried this, and it works. It seems like a decent approach, at least until Pinterest sees fit to add some better tools, such as an image whitelist option. The main drawback is needing to add Pin-it buttons on every image you want to enable for your users & your users may be annoyed that they can't pin anything.
Unfortunately, there is no way to mark several images on your page as preferred, but you can mark one image to stay at the top of your images when someone pin it. Specify this meta-tag in <head>:
<meta property="og:image" content="http://YOUR-DOMAIN.com/IMAGE.jpg"/>
I have not found official confirmation for this feature, but it works great with addthis sharing plugin.
Add this script before the actual call to pinterest. And set images that you do not want to show with a class called 'nopin'
<script type="text/javascript">
var addthis_config =
{
image_exclude:'nopin'
}
</script>
<div id="toolbox" class="addthis_toolbox addthis_default_style">
<a class="addthis_button_facebook_like" fb:like:layout="button_count"></a>
<a class="addthis_button_tweet"></a>
<a class="addthis_button_tumblr"></a>
<a class="addthis_button_pinterest"></a>
</div>
</div>
If anyone is using AddThis, please check this thread: http://support.addthis.com/customer/portal/questions/1570789
AddThis has some, uh, unique functionality that affects the image picker presented. As in, when there is only one image on the page, it ignores the defined og:image.
If you set that lone image to be excluded, then the image picker won't show any images for selection.
I am playing around with the HTML5 features, and I want div's (and similar containers like articles, sections, etc.) to be draggable. Consider the following code:
<!DOCTYPE html>
<html>
<head>
<title>A Simple Draggable Object</title>
</head>
<body>
<h1>Test #1: A Simple Draggable Object</h1>
<div draggable="true">This text should be draggable.</div>
</body>
</html>
I tested in OS X the following browsers:
In Chrome 7.0 and Safari 5.0.2 I can successfully drag the text around, but in Firefox 3.6 and 4.0b6 I can neither drag the text nor mark it (as if it was usual text). Is this a bug or a feature?
How do I achieve that Firefox lets me drag around these tags without using jQuery ?
According to HTML5 Doctor, this won't work in Firefox without some JS help.
The HTML 5 spec says it should be as
simple as adding the following
attributes to the markup of the
elements in question:
draggable="true"
However, this doesn’t work completely
for Safari or Firefox. For Safari you
need to add the following style to the
element:
[draggable=true] {
-khtml-user-drag: element;
}
This will start working in Safari, and
as you drag it will set a default,
empty value with the dataTransfer
object. However, Firefox won’t allow
you to drag the element unless you
manually set some data to go with it.
To solve this, we need a dragstart
event handler, and we’ll give it some
data to be dragged around with:
var dragItems = document.querySelectorAll('[draggable=true]');
for (var i = 0; i < dragItems.length; i++) {
addEvent(dragItems[i], 'dragstart', function (event) {
// store the ID of the element, and collect it on the drop later on
event.dataTransfer.setData('Text', this.id);
});
}