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JavaScript OR (||) variable assignment explanation
... " messages.";
var noNewMessagesText = "Sorry, you have no new messages.";
alert((messages && newMessagesText) || noNewMessagesText);
Inside the alert, we check if messages is falsy, and if yes, then evaluate and return noNewMessagesText, otherwise evaluate and return newMessagesText. Sinc...
Print content of JavaScript object? [duplicate]
Typically if we just use alert(object); it will show as [object Object] . How to print all the content parameters of an object in JavaScript?
...
How Many Seconds Between Two Dates?
...
Just subtract:
var a = new Date();
alert("Wait a few seconds, then click OK");
var b = new Date();
var difference = (b - a) / 1000;
alert("You waited: " + difference + " seconds");
...
How to check if the URL contains a given string?
...tion() {
if (window.location.href.indexOf("franky") > -1) {
alert("your url contains the name franky");
}
});
</script>
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How to get a cross-origin resource sharing (CORS) post request working
...esponse) {
var resp = JSON.parse(response)
alert(resp.status);
},
error: function (xhr, status) {
alert("error");
}
});
RESPONSE:
response = HttpResponse(json.dumps('{"status" : "success"}'))
response.__se...
How do I programmatically click a link with javascript?
...
Simply like that :
<a id="myLink" onclick="alert('link click');">LINK 1</a>
<a id="myLink2" onclick="document.getElementById('myLink').click()">Click link 1</a>
or at page load :
<body onload="document.getElementById('myLink').click()">
...
JavaScript object: access variable property by name as string [duplicate]
... }
};
var filename = Test01[whatOption][whatColor];
alert(filename);
}
</script>
</head>
<body>
<p onclick="displayFile('rectangle', 'red')">[ Rec Red ]</p>
<br/>
<p onclick="displayFile('square', 'blue')">[ Sq Blue ...
Why is null an object and what's the difference between null and undefined?
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The difference can be summarized into this snippet:
alert(typeof(null)); // object
alert(typeof(undefined)); // undefined
alert(null !== undefined) //true
alert(null == undefined) //true
Checking
object == null is different to check if ( !object ).
The latter is equ...
Why does isNaN(“ ”) (string with spaces) equal false?
...
Try using:
alert(isNaN(parseInt(" ")));
Or
alert(isNaN(parseFloat(" ")));
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Executing injected by innerHTML after AJAX call
... },
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert("error retrieving content");
}
Another quick and dirty way is to use eval() to execute any script code that you've inserted as DOM text if you don't want to use jQuery or other library.
...