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How to check if character is a letter in Javascript?
I am extracting a character in a Javascript string with:
14 Answers
14
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What is the most efficient way to deep clone an object in JavaScript?
What is the most efficient way to clone a JavaScript object? I've seen obj = eval(uneval(o)); being used, but that's non-standard and only supported by Firefox . I've done things like obj = JSON.parse(JSON.stringify(o)); but question the efficiency. I've also seen recursive copying funct...
Check if Internet Connection Exists with Javascript? [duplicate]
How do you check if there is an internet connection using Javascript? That way I could have some conditionals saying "use the google cached version of JQuery during production, use either that or a local version during development, depending on the internet connection".
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Practical non-image based CAPTCHA approaches?
...e="hidden" name="antispam" value="lalalala" />
I then have a piece of JavaScript which updates the value every second with the number of seconds the page has been loaded for:
var antiSpam = function() {
if (document.getElementById("antiSpam")) {
a = document.getElementB...
How to convert URL parameters to a JavaScript object?
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2020 ES6/7/8 and on approach
Starting ES6 and on, Javascript offers several constructs in order to create a performant solution for this issue.
This includes using URLSearchParams and iterators
let params = new URLSearchParams('abc=foo&def=%5Basf%5D&xyz=5');
params...
how to use javascript Object.defineProperty
...he code works the same way as our thoughts.
So much about properties. But javascript is different from pure Object-oriented languages like C# and codes the features differently:
In C#, transforming fields into properties is a breaking change, so public fields should be coded as Auto-Implemented Pr...
Convert JavaScript string in dot notation into an object reference
...:
what about arrays? something like "a.b[4].c.d[1][2][3]" ? –AlexS
Javascript is a very weird language; in general objects can only have strings as their property keys, so for example if x was a generic object like x={}, then x[1] would become x["1"]... you read that right... yup...
Javascr...
How do I get a UTC Timestamp in JavaScript?
...of the headache of the "Daylight Saving Time" adjustments. Here's a little JavaScript code that I use.
To get the current UTC time:
function getCurrentTimeUTC()
{
//RETURN:
// = number of milliseconds between current UTC time and midnight of January 1, 1970
var tmLoc = new Date();...
What does `void 0` mean? [duplicate]
...er noticed before, this isn't a perfect world, especially when it comes to Javascript.
The problem with using undefined was that undefined is not a reserved word (it is actually a property of the global object [wtfjs]). That is, undefined is a permissible variable name, so you could assign a new v...
Amazon S3 direct file upload from client browser - private key disclosure
...irect file upload from client machine to Amazon S3 via REST API using only JavaScript, without any server-side code. All works fine but one thing is worrying me...
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