While browsing through the source code of a website, I came across this interesting snippet.
<link href="#" id="colour-scheme" rel="stylesheet">
I'm curious, what exactly does this code snippet do?
While browsing through the source code of a website, I came across this interesting snippet.
<link href="#" id="colour-scheme" rel="stylesheet">
I'm curious, what exactly does this code snippet do?
In the absence of a base element, it simply consumes a small amount of the browser's resources. According to URL standards, using # as a URL points to the beginning of the document at the current base URL. However, if this tag is within an HTML document, it will not work as intended (either due to the document being served with an HTML media type or the browser attempting to parse HTML with a CSS parser).
If a base tag is employed to specify a base URL that references a CSS document, it could technically function, for example:
<!doctype html>
<title>Demo</title>
<base href="http://www.cs.tut.fi/~jkorpela/basic.css">
<link href="#" id="colour-scheme" rel="stylesheet">
<h1>Hello world</h1>
This approach would be quite uncommon and would restrict the use of relative URLs elsewhere in the document. Therefore, this is more of a theoretical concept rather than a practical application.
The use of href="#" is likely just a placeholder here, intended to be replaced by JavaScript code or similar methods. This practice is not recommended for various reasons. A preferable alternative would be to exclude the href attribute (even though this is technically not valid in HTML5) and dynamically insert one when needed.
This serves no purpose other than remaining on the current page.
This concept originates from the Anchors that enable users to navigate to a specific part of a webpage (usually an id).
Often used to indicate the presence of a link, even if the linked page does not yet exist, this practice is a common temporary solution in web development.
As explained in responses from Ryan and Tom, this technique can also be employed to dynamically load CSS files.
When using a hashtag (#) in a link tag, it is a common practice to enable the use of JavaScript later on, especially when the URL is unknown or does not need to be predefined.
For instance:
HTML
<link href="#" id="color-scheme" rel="stylesheet">JS
document.getElementById("color-scheme").href="blue.css";This method allows you to dynamically set the URL of the stylesheet using JavaScript, instead of hard-coding the location.
Most likely a stylesheet that will be loaded at a later time.
url = linkLocation
The href attribute determines the address of a specific webpage, creating a connection between the element where it is placed (the source anchor) and the target anchor indicated by this attribute.
Developers frequently use a hash symbol(#) as a placeholder when the actual reference is unknown. In the case of a live website, JavaScript could be dynamically loading a stylesheet based on the user's color scheme preference. Until the user selects a color scheme, there is no need for a reference, hence the use of the hash symbol.
Typically, we include a reference to our CSS file like this. For example, if we have an HTML file and need to link an external CSS file, we use . Learn more about this process by visiting http://www.w3schools.com/tags/att_link_href.asp
It appears that the HTML link tags are primarily utilized for linking external files in this case.
href="theme.css"
However, by using href="#" it seems that no action will be taken or purpose will be served.
<link href="#" id="custom-style" rel="stylesheet">
href : Indicates the path to the desired CSS file for inclusion in the webpage
By using href="#", no CSS file will be imported.
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