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How can I convert a string to boolean in JavaScript?
... do:
String.prototype.bool = function() {
return strToBool(this);
};
alert("true".bool());
For those (see the comments) that would like to extend the String object to get this but are worried about enumerability and are worried about clashing with other code that extends the String object:
...
How do I get the width and height of a HTML5 canvas?
...nt.getElementById( 'yourCanvasID' );
var ctx = canvas.getContext( '2d' );
alert( canvas.width );
alert( canvas.height );
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Best way to detect when a user leaves a web page?
...lientY < 0)) {
//window.localStorage.clear();
//alert("Y coords: " + window.event.clientY)
}
};
In my example, I am clearing local storage and alerting the user with the mouses y coords, only when the browser is closed, this will be ignored on all page loads from...
Long Press in JavaScript?
...emove("longpress");
if (longpress) {
return false;
}
alert("press");
};
var start = function(e) {
console.log(e);
if (e.type === "click" && e.button !== 0) {
return;
}
longpress = false;
this.classList.add("longpress");
if (presstime...
Return multiple values in JavaScript?
...s: dCodes,
dCodes2: dCodes2
};
}
var result = newCodes();
alert(result.dCodes);
alert(result.dCodes2);
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Access-Control-Allow-Origin error sending a jQuery Post to Google API's
...',
crossDomain: true,
dataType: 'jsonp',
success: function() { alert("Success"); },
error: function() { alert('Failed!'); },
beforeSend: setHeader
});
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TypeError: Cannot read property 'then' of undefined
...unction.
islogged:function(){
var cUid=sessionService.get('uid');
alert("in loginServce, cuid is "+cUid);
var $checkSessionServer=$http.post('data/check_session.php?cUid='+cUid);
$checkSessionServer.then(function(){
alert("session check returned!");
console.log("chec...
How to prevent buttons from submitting forms
...bmit and handling the event server-side - this is known as unobtrusive JavaScript.
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Check if object is a jQuery object
...t" },
b = $('body');
if ( a.jquery ) { // falsy, since it's undefined
alert(' a is a jQuery object! ');
}
if ( b.jquery ) { // truthy, since it's a string
alert(' b is a jQuery object! ');
}
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How can javascript upload a blob?
... actually don't have to use FormData to send a Blob to the server from JavaScript (and a File is also a Blob).
jQuery example:
var file = $('#fileInput').get(0).files.item(0); // instance of File
$.ajax({
type: 'POST',
url: 'upload.php',
data: file,
contentType: 'application/my-binary-typ...