Linked Questions
20 questions linked to/from What should every JavaScript programmer know?
697
votes
13
answers
148k
views
Is JavaScript guaranteed to be single-threaded?
JavaScript is known to be single-threaded in all modern browser implementations, but is that specified in any standard or is it just by tradition? Is it totally safe to assume that JavaScript is ...
- 18.1k
485
votes
15
answers
160k
views
How to "properly" create a custom object in JavaScript?
I wonder about what the best way is to create an JavaScript object that has properties and methods.
I have seen examples where the person used var self = this and then uses self. in all functions to ...
- 182k
359
votes
10
answers
396k
views
Can I set variables to undefined or pass undefined as an argument?
I’m a bit confused about JavaScript’s undefined and null values.
What does if (!testvar) actually do? Does it test for undefined and null or just undefined?
Once a variable is defined can I clear it ...
- 11.3k
120
votes
6
answers
48k
views
How do I pass the value (not the reference) of a JS variable to a function? [duplicate]
Here is a simplified version of something I'm trying to run:
for (var i = 0; i < results.length; i++) {
marker = results[i];
google.maps.event.addListener(marker, 'click', function() {
...
- 2,331
39
votes
13
answers
15k
views
What are the top JavaScript pitfalls? [closed]
I'm planing on giving an introduction talk on JavaScript and in the preparation process I wondered what the top pitfalls are that rookies fall into.
I know I've had a few gotchas before I fully ...
47
votes
12
answers
13k
views
Why am I finding Javascript/jQuery so difficult to get right?
My background is in C and I've picked up PHP, mySQL, HTML, CSS without too much issue.
But I'm finding Javascript/jQuery surprisingly difficult to get right.
Very frustrating.
Why?
It seems to ...
- 1,815
55
votes
2
answers
15k
views
How is a JavaScript string not an object?
A comment by Vítor De Araújo on a blog post by Douglas Crockford points out that the two are not the same. He gives an example showing that a string is not like an object:
A string object and a ...
- 259k
14
votes
3
answers
4k
views
Referencing a JavaScript value before it is declared - can someone explain this
I'm hoping someone can explain to me why the below JavaScript/HTML will show "door #2" when the HTML is viewed in a browser:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://...
- 24.5k
13
votes
4
answers
3k
views
JS Object this.method() breaks via jQuery
I'm sure there's a simple answer to this, but it's Friday afternoon and I'm tired. :(
Not sure how to explain it, so I'll just go ahead and post example code...
Here is a simple object:
var Bob =
{ ...
- 113k
4
votes
5
answers
4k
views
bold, header effects in alert()?
in javascript, how to make alert bold n use h1 to h5 headers? Is this possible or simply plain alert is option?
how to include bold and h1 to this alert?
function onlooad()
{
alert("wssup??");
}
- 2,058
6
votes
2
answers
23k
views
Javascript Global Variables Not Working as expected. Help?
I am new to Javascript. I am facing a problem with global variables. I can't figure out that why the global variables are not working as the code looks ok. Please Help me solve this problem.
I will ...
- 2,497
5
votes
2
answers
523
views
PHP url functions and subdomains
I have a website thenoblesite.com. It has some subdomains i.e.
download.thenoblesite.com
wallpaper.thenoblesite.com
etc.
Pages for subdomains are present in the main htdocs folder i.e.
...
- 2,497
-1
votes
3
answers
5k
views
JavaScript object not working
I am facing a problem with JavaScript objects. I have some text on a page which should converts into textfield when clicked. The problem is that when I click the text the console displays the error ...
- 2,497
1
vote
4
answers
2k
views
Insert code into body of function at runtime
Coming from Java with experience in bytecode editing, I was wondering if I could change the bodies of functions at runtime with Javascript.
For this question, let's use the following code as example:
...
- 4,645
-1
votes
2
answers
675
views
PHP automatically renaming downloaded files
I am new to PHP. I have a software downloads website. What I want is to
automatically add "-mysite.com" with every download filename. So that the actual
filename remain the same i.e "somesoftware....
- 2,497