i am trying to reduce my webpage load time . When i am searching i come to this point preload css and javascript .
So i am trying to implement this in my html page please see my html code before and after implementation
before
<html>
<head>
<link href="http://fonts.googleapis.com/css?family=lato:400,100,200,300,500%7COpen+Sans:400,300,600,700,800%7COswald:300,400,700" rel="stylesheet" type="text/css"> ...........
</head>
<body>
html contents
<script src="assets/js/jquery-1.12.4.min.js" type="text/javascript"></script>
</body>
</html>
After implementation i change like this
<html>
<head>
<link rel="preload" href="http://fonts.googleapis.com/css?family=lato:400,100,200,300,500%7COpen+Sans:400,300,600,700,800%7COswald:300,400,700" as="style">
<link rel="preload" href="assets/js/jquery-1.12.4.min.js" as="script">
<link rel="stylesheet" href="http://fonts.googleapis.com/css?family=lato:400,100,200,300,500%7COpen+Sans:400,300,600,700,800%7COswald:300,400,700">
</head>
<body>
html contents
<script src="assets/js/jquery-1.12.4.min.js"></script>
</body>
</html>
But i can't notice any increase in speed . So please help to make this in correct way
i read the following article
https://developer.mozilla.org/en-US/docs/Web/HTML/Preloading_content .
But i can't figure out . Please help .
Or is there is any better method for page speed ?
Why this doesn't work
Preloading resources that are loaded directly in the HTML is useless. This is because the browser reads the preload at the same time as the actual resource reference.
Preloading is useful to reduce the length of your request waterfall.
Imagine the following situation:
style.css
body {
background-image: url(myimage.png);
}
index.html
<html>
<head>
<link rel="stylesheet" href="style.css" />
</head>
<body>
</body>
</html>
The process of loading the above page consists (roughly) of the following steps:
Download index.html
Parse the HTML file
Because of the link tag, download style.css
Parse the CSS file
Because of the background-image, download myimage.png
Parse the image and display it on the screen
This means your request waterfall is index.html -> style.css -> myimage.png.
By adding a preload for myimage.png the browser can download the image earlier, so your request waterfall becomes:
index.html +-> style.css
+-> myimage.png
Instead of 3, it is now only 2 requests long, which means faster load times.
What else can you do to improve (perceived) page load times?
Some common ways are:
Minify your assets (JavaScript, stylesheets)
Ensure your server has compression enabled for static assets
Only load resources actually required on page load first, then load other scripts later (like those for user interactions).
But to get a better overall view of the things you can improve you can use the Chrome Audit system (Lighthouse).
https://developers.google.com/web/updates/2016/03/link-rel-preload
See the above article link. I saw the link shared above. Preload never makes the page load the page fast. It only gives the priority to the files which is declared rel="preload" to load very early as the page loads up. You can read the article again Also the article shared by me. It will say the same.
You will need other methods to load the page fast. This method will not be helpful. There are few methods listed below you can use to make page load faster.
You can minify css and js files which will load very very fast than normal file.
You can minify script and css files from (https://www.minifier.org/) here.
Avoid external links of css and js files
Avoid spaces and Newlines in code.
Use compressed images which will also load faster.
Enable Caching.
Related
I have been learning how to make client-server applications recently and am following this tutorial by Traversy Media. This is the Github page for the code that mine is based on. Though I have resolved the MIME type issue that is brought up.
But the problem is, when I run the code, the CSS stylesheets(both the stylesheet linked to the website and the style.css file in the css folder) do not appear to be applied to the HTML page. What happens when I run the HTML file is that the HTML page appears to be without any style, meaning that although the HTML does appear in the webpage, the HTML elements do not have any styles.
I thought that it was simply because of an error in referencing the CSS files but I have tried to fix it by moving the CSS files around and also changing the hrefs of the link element in the HTML code and also copying the code of the CSS stylesheet from the website into "online-resource.css" but none of what I did worked.
<link
rel="stylesheet"
href="online-resource.css"
type="stylesheet/css"
/>
<link rel="stylesheet" href="style.css" type="stylesheet/css"/>
Anyone have any ideas? It probably doesn't have anything to do with node.js because the same thing happens when I run it independently
Change your type property to be text/css not stylesheet/css which is being interpreted as an invaild type and not allowing the CSS to load.
<link rel="stylesheet" href="online-resource.css" type="text/css" />
<link rel="stylesheet" href="style.css" type="text/css" />
I think the css file not loading properly. Also check whether the code inside the css files are correct or not.
Make sure you saved the file. It's silly, but I can personally vouch for the time when I couldn't make my site update, and I forgot to save/update the file I was viewing.
Make sure the stylesheet is loading. In Chrome, if you right-click -> inspect element and go to the sources tab, you can see all loaded resources, including your CSS.
Recently re-did all the files to my website, and uploaded them to the 000webhost server they're located on. It's just some basic HTML but is heavily reliant on the CSS to make it look good. So when I checked it out to see that it didn't work, I realized not only did the javascript not work but the CSS too. I think it might be an error in my code, seeing as all the other files work fine. Any help would be appreciated.
I've tried redirecting the file paths, adding the head tags, deleting and re-adding the file to the server, and waiting to see if it was a server issue.
Here is the first couple of lines to my index HTML file:
<html>
<title>Home</title>
<link rel="shortcut icon" type="image/png" href="images/amistufffavicon.ico">
<link rel="stylesheet" type="text/css" href="style.css">
<script src="functions.js"></script>
I really just want to make the HTML pages look good, and an explanation in case it ever happens again I know what to do.
first, use the {} logo on the top of the text editor to make your code show up. all you have to do is highlight your code, then click the {} button and it will format it for you.
your CSS and JS code actually looks like the HTML tags for these imports.
One bit of advice, if you have issues making several files work, just write everything in your HTML file
instead of
<link rel="stylesheet" type="text/css" href="style.css">
<script src="functions.js"></script>
just do this:
<html>
<style>
/*write style here*/
</style>
<script>
//write script here
</script>
</html>
I have a site published with GitHub pages:
https://safelyswift.github.io/Swizzle/
I want to use docs/css/style.css in my index.html file. I have tried using the full url, GitHub raw url, and shortened url but none of them work.
ie: I have tried many variations on this line:
<link rel="stylesheet" href="https://github.com/SafelySwift/Swizzle/blob/master/docs/css/style.css">
<link rel="stylesheet" href="/Swizzle/docs/css/style.css">
<link rel="stylesheet" href="https://raw.githubusercontent.com/SafelySwift/Swizzle/master/docs/css/style.css">
but none work.
Getting error:
Did not parse stylesheet at 'https://github.com/SafelySwift/Swizzle/blob/master/docs/css/style.css' because non CSS MIME types are not allowed in strict mode.
in Safari debug console.
Try: <link rel="stylesheet" href="css/style.css">
You should link to css/style.css, which is short of https://safelyswift.github.io/Swizzle/css/style.css because the root directory of your GitHub Page is /docs.
The reason "https://github.com/SafelySwift/Swizzle/blob/master/docs/css/style.css" not work is because this link actually goes to the GitHub code preview page. It's not a valid CSS file but an HTML page with lots of GitHub functions(preview, commit log, history, etc.) But "https://safelyswift.github.io/Swizzle/css/style.css" is served by GitHub Page, so this link contains only pure CSS file which is valid.
To see the difference between these files. Just navigate these link with your browser, and right-click your page to see the source code. You can see what your browser sees there.
I'm just transferring all my files over from xampp's htdocs to my server and now I just need to add a favicon.
I have the icon saved as 'favicon1.ico' and it is a proper icon size 16x16, but I cant get it to work.
This is the code I have for it:
<html>
<title>Server Test</title>
<head>
<h1> Hello World </h1>
<link rel="shortcut icon" href="O:\Intranet\favicon1.ico"/>
</head>
<body>
</body>
</html>
That is the correct location of the icon in the href so I dont see why this shouldn't work.
I've never added a favicon to a site before so that is where my main problem of not knowing exactly what it should look like lies.
Your Favicon path uses a windows style File path as pointed out in the comments.
Ensure the following
favicon1.ico file is present in the package that you are transferring onto the server.
Ensure that the file is accessible over http (try using a browser to navigate to it). The path should be something like http://server:port/app-uri/favicon1.ico
After that as suggested in one of the comments use a relative path such as ./favicon1.ico in the HTML source.
Also I suggest reading up on the concept of favicon http://www.w3.org/2005/10/howto-favicon
Code below should work. Try this.
<link rel="icon" type="image/png" href="http://yoursite.com/favicon1.ico">
Notice that href points to the address of your icon depending where you put the icon.
I am working on a project for school and wanted to use the less library. I tried something like
<link rel="stylesheet/less" type="text/css" href="style.less">
but this didn't work, I got the error
XMLHttpRequest cannot load file:/// [..] /style.less. Cross origin requests are only supported for HTTP.
Meaning I basically need to run a server for this implementation. However, since this is supposed to be a stand-alone project for a non-technical class, running a server is out of the question. So, my question is:
How do I use less at document level, the same way one would write the css equivalent
<style>div{color:#F00}</style>?
Searching the google for "document level less" returned no related results.
You can't use LESS at document level. Less is a pre compiler for CSS, so you should use the end product in your site (css). You don't need a webserver to show html + css local in a webbrowser. You can compile your LESS to CSS client side (by including less.js) or server side, the source code bundles a compiler.
Also read: Is there a way to bypass Javascript / jQuery's same origin policy for local access?
for example the file like below works also when i load it from my local files in a webbrowser:
<html>
<head>
<link rel="stylesheet" media="(max-width: 767px)" href="green.less" />
<link rel="stylesheet" media="(min-width: 768px)" href="red.less" />
<script type="text/javascript">less = { env: 'development' };</script>
<script src="less.js" type="text/javascript"></script>
</head>
<body>
<p>color this text</p>
</body>
</html>
update
When you are sure javascript works and less.js loads and you don't see your styles still, their probably will be an error or typo in your LESS files. If there is an error, your LESS file won't compile, so their will be any CSS and you won't see any styling.
By default less.js don't show errors in the browser. Add <script type="text/javascript">less = { env: 'development' };</script> to your source to allow LESS errors shown in your browser (from: https://stackoverflow.com/a/11289000/1596547).
Example: