Most D3 examples have the HTML, JavaScript and CSS all in the same file. Using this example http://bl.ocks.org/d3noob/5028304, I am trying to break these into separate files (this way I'll be able to embed D3 into a website, putting the files in the proper locations).
When all in one file, let's say index.html, everything works as it should. When I separate this into 3 files: index.html, sankey_create.js, and style.css, The HTML title (that I inserted <h1>Title</h1>) renders, but the SVG doesn't.
Possible Issue #1: File Referencing
Everything is in one folder and I think that I have referenced the separate files correctly in the header (The console in Firefox says that all the files have loaded):
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="sankey.js"></script>
<script src="sankey_create.js"></script>
<link rel="stylesheet" type="text/css" href="style.css">
Possible Issue #2: Binding to External HTML Element
The way this example works is that there is a <p id="chart"> element to which the D3 SVG binds to:
var svg = d3.select("#chart").append("svg") // This line is in sankey_create.js
I'm not sure if I need to reference the element differently now that they are in separate files.
I have only included the code that I think maybe causing the issue since, but Ican provide more code/information if necessary.
To analyse the problem you need to understand that semantically, the script tags can be replaced by the code they reference and the referenced code is executed before the next node is processed, so it's the same as having the code in your index file at the point where the script tags are.
Related
I have created 3 different html, css and javascript files but I am now confuse how can I interlink them and upload as a single file
Looks like you're just getting introduced to web development, these might come in handy for finding out how to bring your HTML, JS and CSS files together:
(Link JS File) - https://www.w3schools.com/tags/att_script_src.asp
(Link CSS file) - https://www.w3schools.com/tags/tag_link.asp
https://www.w3schools.com/
In order to make your codes to be run by browser you need to include all your sources in one .html file. You need to link those files inside this file and there are different requirement of each file extensions to be included.
In order to link CSS file you use link element with src attribute to indicate the source of your file. Another attribute rel defines the relationship between a linked resource and the current document. In here it is stylesheet document and need to get this value.
Sample: <link rel="stylesheet" href="styles.css">
In order to link your JS file, you need to use element which is used to define a client-side script (JavaScript). You may add it internally or externally. According to your question you need to add it externally. First, add your script element and then refer to it using the src attribute in the script tag.
Sample: <script src="myJSFile.js">
Resources for learning more in these topics:
https://www.w3schools.com/tags/tag_link.asp
https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/rel
https://www.w3schools.com/tags/att_script_src.asp
To inter-link different HTML files together, you can just use Hyperlink, Hyperlinking is a feature of HTML to link multiple documents (HTML) files together. It'll show up as a button on your HTML.
Here's an example of how you can implement it. href="your-path-to-your-html"
Click here to visit school
Click here to visit inventory
Click here to visit battle
To understand more about hyperlinking, you can read this for better examples: https://www.w3schools.com/htmL/html_links.asp
I'm following the basic Heroku tutorial using Python (Django) to stand up a web page. I eventually want to blog, and to include code snippets, so I wanted to include highlight.js to make the code look prettier.
However, I cannot figure out how or where to include the <link ... "style/...css" /> and/or <script ...highlight.min.js" ></script> to get things to render - I end up with plain code-text even though my <pre><code>...</code></pre> tags have hljs class appended, and I can see that the stylesheet and script are linked correctly.
Instead of trying to copy and paste 16 different files with 40 lines each, I think it's easiest to just link to my testing page.
page which should be using highlight js but isn't.
Note also that I'm trying to use a highlight.js stylesheet called androidstudio; the giveaway that it's working is that the code background will be gray/black, and some of the words will be bold and different colors (ie the entire point of highlight js).
This question is different from this local static file question because I'm trying to use //cdnjs files, that is, publicly-hosted js and css files.
You forgot the quote (") before stylesheet:
<link rel="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.1.0/styles/androidstudio.min.css" />
When you view source using Firefox it highlights (no pun intended) your error:
I have this animation, see: js fiddle example
When I tried to convert it notepad++ .js and .html documents, I got:
uncaught reference error: Raphael is not defined.
What should I do to fix it? I gave the reference as:
<script type = "text/JavaScript" src ="Raphael 2.1.0.js"> </script>
You are not including raphael.js javascript file to your document correctly.
Add code below to your .html file, right before enclosing </body> element and any other javascript which are doing work with raphael.js library. (In other words, all javascript in js fiddle window goes below script include tag.)
<script type="text/javascript" src="path/to/raphael.js"></script>
// ... your raphael.js related javascript is located here ...
</body>
The reason why it works inside jsfiddle is that you can see from left upper corner of the page that Raphael 2.1.0 is selected, so jsfiddle includes it automatically to the page.
Hence, you should either download raphael.js file to your project folder or use extranal cdn url for the resource, such as http://cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js (but be aware, if location changes your code will stop working.)
Cheers.
Im just curious if there is any advantage to using (a minified version of) javascript and css in the header with the script and style tags vs including them from a separate document via link to css and a script to javascript?
Isn't there theoretically added page load time in the second way since there would be extra page requests?
so this:
<head>
<script>
//Javascript
</script>
<style>
//Css
</style>
</head>
<body>
//Content Here
</body>
</html>
Vs This:
<head>
<script src='http://someJavascript.com/link/to/file.js' type='text/javascript'></script>
<link href='http://someCSS.com/link/to/file.css' rel='stylesheet'>
</head>
<body>
//Content Here
</body>
</html>
The advantage is mostly modularity. If you use the same JS or CSS in multiple files, it's best to keep them in one place. That way, if you make a change to them, you don't have to update all the files, you just update it in one place.
But if the JS or CSS is specific to a particular file, you might as well put them directly in the file rather than force a separate request.
I would generally do the scripting or styling inline, although it is useful to load it remotely if you want something for multiple different HTML files (e.g. the same stylesheet for all the pages on a website). Load times increase a bit, but unless you are expecting to get thousands of page loads, it's pretty minimal. Your "header" tags should also be "head" tags.
Having the JavaScript and CSS in separate files allows browsers and proxies to cache them - so if the main section of the page is dynamically generated, only the changing content will get re-downloaded on a reload.
To keep the code clean I was attempting to put my scripting code in script.js and my SVG code in svg.svg . Additionally I was including these files in my html but the javascript does not run at all. Is there some way to achieve this or do I have to embed the javascript in the SVG code using:
<script>
<![CDATA[
...
// ]]>
</script>
My Current html code includes the javascript and svg in this manner:
<embed src="svg.svg" type="svg+xml"></embed>
and
<script type="text/javascript" xlink:href="script.js"></script>
So I learned a couple of things through my trial and error. Although I am sure most people may already know this I am learning this on my own and it was a big realization for me. For some reason the documentation is not as thorough as one would expect.
The markers <![CDATA[at the beginning and end // ]]> of the script are not really required. The script can be placed out of the svg tags. I believe that in the case that you are placing code within the tags you may need to include those identifiers.
The svg file can include the js file in this manner:
<script type="text/javascript" xlink:href="script.js"></script>
As always the elements in svg can be easily referenced by id. Just give an id and then use document.getElementById()
Another interesting discovery is that the the O Reily book on SVG located at: http://commons.oreilly.com/wiki/index.php/SVG_Essentials
sometimes uses some old syntax which does not run correctly. So watch out.