I've been messing around with paperjs for a while and have written a 1500+ lines of code single file that I'd really love to split up into multiple files to make it more readable.
Initially I thought i could just make a library.js file that I'd put in the public/scripts directory and load into my page using <script src="/scripts/library.js"></script>. However, calling any function that is retained in library.js would then yield an error such as:
ReferenceError: Path is not defined
So how would i store functions in- and use them from external files the right way?
You got that error because you miss to set your tag type to "text/paperscript", and not "text/javascript" like you use for loading paperjs.
Try this way:
<!-- Load the Paper.js library -->
<script type="text/javascript" src="paper-full.min.js"></script>
<!-- Load external PaperScript and associate it with myCanvas -->
<script type="text/paperscript" src="library.js" canvas="myCanvas"></script>
<body>
<canvas id="myCanvas" resize></canvas>
</body>
Related
I was trying to set up a page on Google Sites to show of my work with some HTML canvas games I made. However, Google Sites' "Insert HTML" option is severely limited, it only lets you enter HTML code that has no external dependencies to work. As you can imagine, the kind of things I want to upload have textures, audio and multiple js files scattered throughout the code. All js files are referenced on the main HTML file, but this isn't working, it isn't picking up the other files and it's just showing a white screen.
Here is all of the HTML code (as you can imagine, 99% of the work is JS):
<html>
<div id="canvas_div_no_cursor">
<canvas id="gameCanvas" width="800"
height="600"></canvas>
</div>
<script type="text/javascript">
document.getElementById('canvas_div_no_cursor').style.cursor = "none";
</script>
<script src="js/classes.js"></script>
<script src="js/HUD.js"></script>
<script src="js/movement.js"></script>
<script src="js/gameplay.js"></script>
<script src="js/graphics.js"></script>
<script src="js/input.js"></script>
<script src="js/audio.js"></script>
<script src="js/Main.js"></script>
</html>
That's about it, all the rest of the code in in those referenced js files. Yes, I uploaded the whole folder to Drive, and even tried importing the html through there, it won't even let me. I searched online to no avail, does anyone have a clue to how I can do this? The only viable option I see is to transfer all the code from the files to the single HTMl file, but I don't even know if it would accept other calls such as .mp3 files and .png files.
You can upload the needed files to Google Drive and get a directo download link to them with this site. Once you have that, simply change the src with the direct link and it should import it.
I have a d3 plot that uses the following script:
<script src="http://d3js.org/d3.v4.min.js" charset="utf-8"></script>
I get the error:
(index):677 Uncaught ReferenceError: d3 is not defined
*I have tried the previous solutions where I save the script locally and add the charset without any luck
I should also say that I can load v3 without issues:
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
But v4 has a function d3.stratify which my visualization uses. I'm hosting this page in a larger enterprise web application where jquery is being loaded. When I host my project separately from the enterprise app (no jquery, just d3) it loads fine.
Is there any way that I can verify this conflict for sure before turning jquery off?
Thanks
The problem occurs if you have requirejs or ther Commonjs/AMD implementation library in your page.
The default UMD bundle is now anonymous. No d3 global is exported if AMD or CommonJS is detected. In a vanilla environment, the D3 microlibraries share the d3 global, even if you load them independently; thus, code you write is the same whether or not you use the default bundle.
So your code should be either like this:
<html>
<body>
<script src="https://d3js.org/d3.v4.js"></script>
<script>console.log(d3)</script>
</body>
</html>
https://jsfiddle.net/3dxuvjke/2/
or like this:
<html>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.5/require.js"></script>
<!-- <script src="https://d3js.org/d3.v4.js"></script> -->
<script>
require.config({
paths: {
d3: "https://d3js.org/d3.v4"
}
});
require(['d3'], function(d3){
console.log(d3)
})
</script>
</body>
</html>
https://jsfiddle.net/3dxuvjke/
If I have,
<script src="jquery.js" ></script>
Then any script after this will allows you to use jQuery($) variable. I need to mimic this behavior in javascript. What I need that add my script file,
<script src="myscript.js" ></script>
which will load jquery.js using javascript and any script after this tag will allow you to use jQuery($) variable. I have no control beside myscript.js file. So I need to make sure that jquery.js must be loaded before allowing the browser to run/execute/render next tags.
What you are trying to achieve is not possible. When loading scripts dynamically you need to use callbacks to ensure that those scripts are loaded and use them only inside those callbacks. You cannot have sequential <script> tags in which one of the scripts loads dynamically some other scripts such as jquery and have subsequent scripts use jQuery. Browsers load script tags sequentially and guarantee that they will be loaded in the same order, but once you start injecting dynamic scripts into the DOM the only way to ensure proper load is to use callbacks. Take a look at the following article for more details.
Splitting it up in two parts should work:
index.html:
<html>
<body>
<script src="myscript.js"></script>
</body>
</html>
myscript.js:
document.write('<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>');
document.write('<script src="myprog.js"></script>');
myprog.js:
$(function(){
alert('jquery ready');
});
I'm new to JavaScript and I'm trying to get a slideshow working in my website. I'm following this tutorial: http://www.queness.com/post/1450/jquery-photo-slide-show-with-slick-caption-tutorial-revisited
Unfortunately it doesn't go into a beginners level of detail as to how to get it installed. I know what I should do with the HTML and the CSS but I'm not sure where I should be putting the JavaScript. Does it go in a separate file or something? How do I get it to work?
Also I'm trying to do this within cakephp so if there's any specific cakey thing I can do that'd be awesome!
Copy all that JavaScript on your referenced page. Save to a new file slide.js or something like that.
Edit your HTML document to include a reference to the jQuery libraby, and that new JavaScript file you've just created:
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
<script type="text/javascript" src="http://mysite.com/slide.js" />
You can put JavaScript in an external file with a .js extension, and include that in an HTML page using the script tag:
<script type="text/javascript" src="yourscript.js"></script>
Alternatively, you can write the script directly in the script element:
<script type="text/javascript">
//Your script here
</script>
Also note that as the tutorial you are following uses jQuery, you will need to download and include the jQuery library in your page.
The script tags can be placed anywhere in the document, but are usually found inside the head tag, or just before the closing body tag.
Welcome on SO Helen.
That script uses the jQuery library so you have to also include that. http://jquery.com/
JavaScript can best be placed in seperate file with the extension .js
Add the javascript files just before the </body> tag on your page like:
<script src="/js/jquery/jquery-1.4.4.min.js" type="text/javascript"></script>
<script src="/js/jquery/jquery-slideshow2.js" type="text/javascript"></script>
The following external CSS files were
included after an external JavaScript
file in the document head. To ensure
CSS files are downloaded in parallel,
always include external CSS before
external JavaScript. 1 inline script
block was found in the head between an
external CSS file and another
resource. To allow parallel
downloading, move the inline script
before the external CSS file, or after
the next resource.
My HTML is:
<head>
<link rel="Stylesheet" href="gStyle.css" />
<script type="text/javascript" src="gMain.js"></script>
<script type="text/javascript" language="javascript">
// Your chart object(s)
var myChart;
// Function to hold all chart creation
function initCharts() {
myChart = new ganttChart("chart1");
myChart.gAddBar("Dynamic!", "22/3/2010", "3/4/2010");
myChart.gLoadData("Going to the shop*4/3/2010*19/3/2010*Watching TV*9/3/2010*23/3/2010*Watching TV*1/3/2010*23/3/2010*Watching TV*18/3/2010*28/3/2010*END INPUT*1/3/2010*9/3/2010");
myChart.gDraw();
myChart.gChangeBarColour(1, "#dd2200");
myChart.gChangeBarColour(2, "#9900ee");
myChart.gChangeBarColour(3, "#00dd00");
myChart.gChangeBarColour(4, "#ffbb00");
myChart.gChangeBarColour(5, "#00aa99");
}
</script>
</head>
<body onload="initCharts()">
<div id="chart1" class="gContainer">
</div>
<div id="db"></div>
</body>
Is it getting confused between the body inline script?
Inspect the page elements. Probably your Chrome extensions are dynamically adding scripts to the page in HEAD.
I think that when javascript is downloaded the browser must wait to get it all and then run it - this stops it going to the next line directly and getting it. I guess styles all get downloaded and then computed down to inheritance position and importance etc...so they can download in parallel.
This kind of thing is hard to regulate in a CMS with components that load their own style and js.
For me, Google Analytics library inserted scripts before the rest of mine.