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How can I determine the current line number in JavaScript?
Does JavaScript have a mechanism for determining the line number of the currently executing statement (and if so, what is it)?
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Is using 'var' to declare variables optional? [duplicate]
...be deleted.
This is, in my opinion, one of the most dangerous issues with javascript, and should be deprecated, or at least raise warnings over warnings. The reason is, it's easy to forget var and have by accident a common variable name bound to the global object. This produces weird and difficult ...
Why would a JavaScript variable start with a dollar sign? [duplicate]
I quite often see JavaScript with variables that start with a dollar sign. When/why would you choose to prefix a variable in this way?
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Detect a finger swipe through JavaScript on the iPhone and Android
...etect that a user swiped his finger in some direction over a web page with JavaScript?
21 Answers
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Custom exception type
Can I define custom types for user-defined exceptions in JavaScript? If so, how would I do it?
13 Answers
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Declaring javascript object method in constructor function vs. in prototype [duplicate]
In creating javascript objects, I can put a method declaration either in the constructor function or in the prototype. For example, say I want a Dog class that has a Name property and a Bark method. I can put the declaration of the Bark method into the constructor function:
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Check if a variable is a string in JavaScript
How can I determine whether a variable is a string or something else in JavaScript?
25 Answers
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How can I pop-up a print dialog box using Javascript?
... when the user arrives at the print-friendly page. How can I do this with javascript?
8 Answers
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jQuery AJAX file upload PHP
... <input type="file" id="photo"><br/>
<script type="text/javascript" src="jquery-3.2.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(document).on('change','#photo',function(){
var property = document.getElementB...
JavaScript function in href vs. onclick
I want to run a simple JavaScript function on a click without any redirection.
15 Answers
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