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I have a problem about jQuery and javascript code; when I write this jQuery below between </head> and <body>
<script type="text/javascript">
var $j = jQuery.noConflict();
$j(document).ready(function(){
$j('#page_effect').fadeIn(3000);
});
</script>
and then write javascript code in body tag
<script src="bubbles.js"></script>
<script type="text/javascript">
bubblesMain(new Object({
type : 'linear',
minSpeed : 100,
maxSpeed : 400,
minSize : 30,
maxSize : 55,
num : 100,
colors : new Array('#FF0000','#FFFFFF','#FFCC99', '#FF33CC')
}));
</script>
then jQuery code can work , but javascript code doesn't work. Finally I found that when I resize the browser after the first loading, it's OK to run.
the bubble.js is to automatically create a canvas element and then raises some bubbles with animation inside canvas.
the partly code is on below :
function bubblesMain(obj){
bubbleResize();
bubbles = new bubbleObject(obj);
bubbles.createBubbles();
setInterval(start,1000/60);
};
//WHEN WINDOW HEIGHT IS CHANGED, REMAKE THE CANVAS ELEMENT
window.onresize = function(event) {
bubbleResize();
}
function bubbleResize(){
var height = parseInt(document.getElementById("canvasBubbles").clientHeight);
var width = parseInt(document.getElementById("canvasBubbles").clientWidth);
document.getElementById("canvasBubbles").innerHTML = '<canvas id="canvas" width="'+width+'px" height="'+height+'px"></canvas>';
}
function start(){
var canvas = document.getElementById("canvas");
canvas.width = canvas.width;
bubbles.move();
bubbles.draw();
};
and I have a <div id="canvasBubbles"></div> indise html.
Then after I added the following code into bubbles.js, It's work to run.
window.onload = function(event) {
bubbleResize();
}
I wonder if someone can suggest a smarter solution to this? thank you.
336
Projects In JavaScript & JQueryYes, you can use multiple versions of jQuery on the same page.
It is possible to run jQuery and JavaScript together in you application. All you need to know is, which is a JavaScript Object when trying to run some methods of it. jQuery can be handy sometimes.
This indicates jQuery is not present so your code is throwing an error on the $(document). ready(); statement. JavaScript doesn't recognize $ as a function. Be sure to import the jQuery library before your custom script is loaded.
Google ChromeIn the "Settings" section click on the "Show advanced settings..." Under the the "Privacy" click on the "Content settings...". When the dialog window opens, look for the "JavaScript" section and select "Allow all sites to run JavaScript (recommended)". Click on the "OK" button to close it.
As stated in the other answers, the <script> tags should be the last thing before the </body> tag. See this question.
The problem with where you've put the tags is that the body of the HTML page hasn't loaded and is therefore not available for manipulation. The reason the window.onload and window.onresize work is because they are called later, when the body of the document is available for manipulation with JS.
Given the details provided in your question, you don't need the jQuery.noConflict() statement.
Here is an alternate version of your code that should do the same thing but with a bit more efficiency. Put it at the end of the body element, just before the </body> tag. I haven't tested it since I don't have all the scripts needed (bubbles, etc).
<!-- this goes at the end of your body element, just before the closing tag -->
<script type="text/javascript" src="bubbles.js"></script>
<script type="text/javascript">
$.ready(function(){
var canvasWrap,
canvasElm,
bubbles;
init();
setInterval(update, 1000/60);
window.onresize = resize;
$('#page_effect').fadeIn(3000);
function init(){
canvasWrap = document.getElementById("canvasBubbles");
canvasElm = document.createElement('canvas');
canvasElm.setAttribute('id', 'canvas');
canvasElm.setAttribute('width', canvasWrap.clientWidth);
canvasElm.setAttribute('height', canvasWrap.clientHeight);
canvasWrap.appendChild(canvasElm);
bubbles = new bubbleObject({
type: 'linear',
minSpeed: 100,
maxSpeed: 400,
minSize: 30,
maxSize: 55,
num: 100,
colors: ['#FF0000','#FFFFFF','#FFCC99', '#FF33CC']
});
bubbles.createBubbles();
update(); // you might not need this
}
function resize() {
canvasElm.setAttribute('width', canvasWrap.clientWidth);
canvasElm.setAttribute('height', canvasWrap.clientHeight);
}
function update(){
// canvasElm.width = canvasElm.width; // is this a hack for something?
bubbles.move();
bubbles.draw();
};
});
</script>
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