Very simple question, can I use functions like await inside paperjs?
I can chain together a lot of .then's and it's going fine, but as soon as I add await in front of it I get the error
SyntaxError: Unexpected token (4:22)
Please tell me they didn't make it so that I have to start wrapping everything in insanely long chains in order to integrate functions like fetch into paperjs. Below my code:
<script type="text/paperscript" canvas="myCanvas">
getCollectionList = async function() {
var collectionlist = [];
collectionlist = await fetch('/api/graph/<%= database %>');
console.log(collectionlist);
}
getCollectionList();
</script>
<canvas id="myCanvas" resize></canvas>
Your are writing your code as PaperScript which implies that Paper.js uses a JavaScript parser to parse it and apply some transformations to it.
The problem is that by default, the JavaScript parser used by Paper.js does not support ES6 features.
You have to load a more recent version of the parser (Acorn) before loading Paper.js to solve your issue.
See my answer to an analog issue here for more details.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Debug</title>
<!-- Load latest acron version first -->
<script type="text/javascript" src="https://unpkg.com/acorn"></script>
<!-- Then load Paper.js -->
<script type="text/javascript" src="https://unpkg.com/paper"></script>
<style>
html,
body {
margin: 0;
overflow: hidden;
height: 100%;
}
canvas {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<canvas id="canvas" resize></canvas>
<script type="text/paperscript" canvas="canvas">
// Here you can now use ES6 syntax.
const myAsyncFunction = async function() {
const response = await fetch('https://yesno.wtf/api/');
const json = await response.json();
console.log(json);
};
myAsyncFunction();
</script>
</body>
</html>
Related
I have a jsfiddle here to illustrate my question
http://jsfiddle.net/ttmt/DgnLd/1/
It's just a simple button with a hidden div. The button slide toggles the hidden div.
I would like to have div filled with a random color each time it opens.
At the moment it's picking two random colors - when the div is opening and when the finished opening.
How can I stop the second color and just have one.
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="http://yui.yahooapis.com/3.4.1/build/cssreset/cssreset-min.css">
<style type="text/css">
•{
margin:0;
padding:0;
}
#wrap{
margin:20px;
}
#btn{
width:100px;
height:50px;
background:red;
color:white;
padding:10px;
margin:0 0 50px 0;
}
#infoDiv{
width:500px;
height:300px;
display:none;
}
</style>
</head>
<body>
<div id="wrap">
CLICK
<div id="infoDiv">
</div>
</div>
<script>
$(document).ready(function(){
alert('here');
var color_arr = ['#6faab6','#80c3d1','#888888','#d8e420','#21b4e4','#e4b115','#33ace4'];
$('#infoDiv').hide();
$('#btn').bind('click', function(){
$('#infoDiv').slideToggle('slow', function(){
var ranNum = Math.floor(Math.random()*color_arr.length);
var col = color_arr[ranNum];
$('#infoDiv').css({'background': col});
});
});
});
</script>
</body>
</html>
$(document).ready(function(){
var color_arr = ['#6faab6','#80c3d1','#888888','#d8e420','#21b4e4','#e4b115','#33ace4'];
$('#infoDiv').hide();
$('#btn').bind('click', function(){
var ranNum = Math.floor(Math.random()*color_arr.length);
var col = color_arr[ranNum];
$('#infoDiv:hidden').css({'background': col});
$('#infoDiv').slideToggle('slow');
});
});
Try that -- I've moved your Random color picker out of the SlideToggle callback as that will only run once the slide was finished which from your question I assumed you didn't want.
It also only changes the color of the info div if it's hidden by checking the visible selector, you can read more about that here
Let me know if that works for you
Has anyone had any luck with this?
I copied and pasted the exact example code here http://www.jqplot.com/deploy/dist/examples/barTest.html into my text editor. I added all the .js files and .css file required. when I run the page in any browser, I am not seeing the bars or the animation. I have looked at the source code on the above URL as well to see how it works. Could someone tell me why I can the animated bar chart on the URL but not from my desktop? What's different? Here is the exact code I copied:
<html>
<title>Untitled Document</title>
<link rel="stylesheet" href="js/jquery.jqplot.min.css" type="text/css" />
<!--[if lt IE 9]><script language="javascript" type="text/javascript" src="js/excanvas.min.js"></script><![endif]-->
<script language="javascript" type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script language="javascript" type="text/javascript" src="js/jquery.jqplot.min.js"></script>
<script language="javascript" type="text/javascript" src="js/excanvas.min.js"></script>
<script language="javascript" type="text/javascript" src="plugins/jqplot.barRenderer.min.js"></script>
<script>
$(document).ready(function(){
$.jqplot.config.enablePlugins = true;
var s1 = [2, 6, 7, 10];
var ticks = ['a', 'b', 'c', 'd'];
plot1 = $.jqplot('chart1', [s1], {
// Only animate if we're not using excanvas (not in IE 7 or IE 8)..
animate: !$.jqplot.use_excanvas,
seriesDefaults:{
renderer:$.jqplot.BarRenderer,
pointLabels: { show: true }
},
axes: {
xaxis: {
renderer: $.jqplot.CategoryAxisRenderer,
ticks: ticks
}
},
highlighter: { show: false }
});
$('#chart1').bind('jqplotDataClick',
function (ev, seriesIndex, pointIndex, data) {
$('#info1').html('series: '+seriesIndex+', point: '+pointIndex+', data: '+data);
}
);
});
</script>
</head>
<body>
<div id="chart1" style="margin-top: 20px; margin-left: 20px;width: 300px; height: 300px; position: relative;"></div>
<div><span>Moused Over: </span><span id="info1">Nothing</span></div>
</body>
</html>
here is what I see in the browser after running that code:
Thanks
For anyone interested, I've found the answer. The example code taken from the barchart.html page in my post doesn't appear to need the conditional syntax (below) in order to animate the bars:
$.jqplot.config.enablePlugins = true;
// Only animate if we're not using excanvas (not in IE 7 or IE 8)..
animate: !$.jqplot.use_excanvas,
From the animate example on the examples page , the following code will do the trick:
animate: true,
// Will animate plot on calls to plot1.replot({resetAxes:true})
animateReplot: true,
I read the entire documentation and was doing a lot of playing around with the code. Eventually, I got to the full "examples" page (not the few listed on the tests and examples page which I initially viewed since it was listed first in the documentation). I really wanted to understand the plugin code since the developer took so much time to really provide a ton of info, comments and updates to his code base.
I've created a PHP file named maps.php that contains a simple Google Maps API that works on the iPad's default browser.
But when I call it using Ajax, the page loads itself but not the map. If I open the link in a desktop or mobile browser it works fine.
You can show google maps by accessing google's javascript api.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="http://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&sensor=SET_TO_TRUE_OR_FALSE">
</script>
<script type="text/javascript">
function initialize() {
var myOptions = {
center: new google.maps.LatLng(-34.397, 150.644),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>
Or you can load any php page directly in webView by using window.location="http://www.mourady.me/alhokair/iphone/maps.php" javascript method, as your php page contain google map in canvas tag, you can not load that in div through ajax call, better way used iframe tag to the job.
<html>
<body onload="bodyload()">
<button onclick="bodyload()">Ajax call</button>
<iframe id="mapDiv" height=500px width=700px src="http://www.mourady.me/alhokair/iphone/maps.php"></iframe>
</body>
</html>
This code below works fine in Chrome and IE 9. But breaks in IE 8.
The errant line is here. I think it's the bind.
google.maps.event.addListener(this.map, "click", (this.leftClick).bind(this));
Has anyone else had this problem? It's not clear if someone has this on SO.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<style>
html, body, #map
{
margin: 0;
padding: 0;
height: 100%;
width: 100%;
}
</style>
<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.1.js"></script>
<script src="http://maps.googleapis.com/maps/api/js?libraries=geometry,drawing&sensor=true" type="text/javascript"></script>
<script language="javascript">
var MyPage = function () {
this.map = null; //google map
};
MyPage.prototype.initialize = function () {
this.map = new google.maps.Map(document.getElementById("map"),
{
zoom: 8,
center: new google.maps.LatLng(30, -97),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
google.maps.event.addListener(this.map, "click", (this.leftClick).bind(this));
}
MyPage.prototype.leftClick = function (event) {
alert('hi');
}
$(window).load(function(){
var my = new MyPage();
my.initialize();
});
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>
the bind Method is not supported in IE8 or below see http://msdn.microsoft.com/en-us/library/ff841995(v=vs.94).aspx
Im trying to create a div that will use jquery's lazy load to load images coming in from linkedIn. When I look at the examples found online, they seem to work fine with my browser, but when i try to add it, it doesnt seem to work. I'm not sure if it matters, but i'm developing in Groovy/grails. here is the code i have so far, before rendering:
<html>
<head>
<script type="text/javascript" src="${resource(dir:'js',file:'jquery.lazyload.js')}">
</script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript" charset="utf-8"></script>
....
<script type="text/javascript">
$("img").lazyload({
placeholder : "/mgr/images/spinner.gif"
});
</script>
....
</head>
<body>
<div style="width: 150px; height:200px; border:1px solid red; overflow:auto;">
<g:each in="${Friends}" status="i" var="Friends">
<img original=${Friends[3]} src="/mgr/images/spinner.gif">
</g:each>
</div>
This code will only draw the div and display the /mgr/images/spinner.gif image but not the original image. Is there something i'm missing?
thanks for your help
jason
Normally you include the plugin file after the jQuery core file. That way the plugin can extend the jQuery core.
Change:
<script type="text/javascript" src="${resource(dir:'js',file:'jquery.lazyload.js')}">
</script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript" charset="utf-8"></script>
To:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript" src="${resource(dir:'js',file:'jquery.lazyload.js')}"></script>
I would also recommend trying to use the newest jQuery core file you can. It may break old plugins but it's well worth attempting as with each update to jQuery come performance enhancements.
jQuery 1.6.4 from Google CDN.
jQuery 1.6.4 from jQuery's CDN.
Also if you want to load some html not just for images using lazy loading plugin you can do easy like that on lazy callbacks
this option "enableThrottle: false", is to ensure your callback is always executed, I had some issues because of this ... sometimes lazy loading wasn't working..
to html add "class="lazy" data-src=" " to an element to section/div/img to call when is displayed to add new html
> $('.lazy').Lazy({
> chainable: false,
> enableThrottle: false,
> onFinishedAll: function () {
> // do what you need ajax call or other
> },
> beforeLoad: function () {
> // do what you need ajax call or other
> },
> afterLoad: function () {
> // do what you need ajax call or other
> },
> onError: function () {
> console.log('could not be loaded');
> }
> });