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How do I declare a namespace in JavaScript?
How do I create a namespace in JavaScript so that my objects and functions aren't overwritten by other same-named objects and functions? I've used the following:
...
How to get the body's content of an iframe in Javascript?
...
The exact question is how to do it with pure JavaScript not with jQuery.
But I always use the solution that can be found in jQuery's source code.
It's just one line of native JavaScript.
For me it's the best, easy readable and even afaik the shortest way to get the iframe...
Handling optional parameters in javascript
... = props.id || 1;
props.callback = props.callback || function(){};
alert( props.callback )
};
getData( {
id: 3,
callback: function(){ alert('hi'); }
} );
Benefits:
you don't have to account for argument order
you don't have to do type checking
it's easier to define default valu...
How does facebook, gmail send the real time notification?
...ty interesting.
A common method of doing such notifications is to poll a script on the server (using AJAX) on a given interval (perhaps every few seconds), to check if something has happened. However, this can be pretty network intensive, and you often make pointless requests, because nothing has ...
How to round up a number in Javascript?
...) / Math.pow(10, rlength);
return newnumber;
}
Call the function as
alert(roundNumber(192.168,2));
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what is difference between success and .done() method of $.ajax
...efore making the request
$.ajax({
url: '...',
success: function(){
alert('AJAX successful');
}
});
// set success action just after starting the request
var jqxhr = $.ajax( "..." )
.done(function() { alert("success"); });
This change is for compatibility with jQuery 1.5's deferred obj...
Detecting arrow key presses in JavaScript
...down = function(e) {
switch (e.keyCode) {
case 37:
alert('left');
break;
case 38:
alert('up');
break;
case 39:
alert('right');
break;
case 40:
alert('down');
break;
...
Variable name as a string in Javascript
...
var x = 2;
for(o in window){
if(window[o] === x){
alert(o);
}
}
However, I think you should do like "karim79"
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Using HTML5/Canvas/JavaScript to take in-browser screenshots
...
JavaScript can read the DOM and render a fairly accurate representation of that using canvas. I have been working on a script which converts HTML into a canvas image. Decided today to make an implementation of it into sending fee...
JavaScript: filter() for Objects
...type
Object.prototype.extended = "I'm everywhere!";
// See the result
alert( {}.extended ); // "I'm everywhere!"
alert( [].extended ); // "I'm everywhere!"
alert( new Date().extended ); // "I'm everywhere!"
alert( 3..extended ); // "I'm everywhere!"
alert( true.exten...