Develop Reference

Remove last 3 letters of div (hidde also in browser page source)

this is my HTML
<div id="remove">Username</div>
and this is my JS code
function slice() {
var t = document.getElementById("remove");
t.textContent = t.textContent.slice(0, -3);
}
slice();
Username load from foreach
{foreach from=$last_user item=s}
{$s.date}
{$s.username}
{/foreach}
This code working and remove 3 letter but when right click on browser and look at page sources i can see "Username" !
I need remove three letter because of privacy and security .
something like
*** name or usern ***
Thank for help me !

The only secure way to make sure the client can't see a particular piece of information is to never send it to the client in the first place. Otherwise, there will always be a way for the client to examine the raw payloads of the network requests and figure out the information they aren't supposed to know.
You'll need to fix this on your backend - either hard-code in
<div id="remove">Usern</div>
or, for a more dynamic approach, use a template engine (or whatever's generating the HTML) and look up how to change strings with it. For example, in EJS, if user is an object with a username property, you could do
<div id="remove"><%= user.username.slice(0, -3) %></div>
Changing the content only with client-side JavaScript will not be sufficient, if you wish to keep some things truly private.
With Smarty, you can define a modifier that takes a string and returns all but the last three characters of it.
function smarty_modifier_truncate_three($string)
{
return substr($string, 0, -3);
}
and then in your template, replace
{$s.username}
with
{$s.username|truncate_three}
If you want only the first three characters, it's easier because you can use the built-in truncate.
{$s.username|truncate:3}

JS doesn't change the source, it can only change the DOM, so what you can do is to keep the element empty and add a value to it using js, but don't forget that js runs on the client's side so its better here to send the string from the server without the last 3 characters.

How do I get document.getElementsByTagName('').innerHTML to make text between 2 tags?

I'm trying to use JavaScript to include a footer on several webpages, so if I want to change the footer, I only have to change it in one place. PHP is not available on this server and neither are server side inserts (SSI), but Perl, Python, and Tcl are available. I have been trying with document.getElementsByTagName('footer').innerHTML = "text"; but it doesn't produce text. I copied this code from dev.mozilla, and it tells me how many tags I have:
var footer = document.getElementsByTagName('footer');
var num = footer.length;
console.log('There is ' + num + ' footer in this document');
So, I don't know what's wrong with the innerHTML script. I also tried with paragraph tags and got the same results in both cases.

I reccoment using textContent instead. Se why here.
To see how it works, paste the following into your browser console while you're on StackOverflow and hit enter.
document.querySelector('.site-footer').textContent = 'Custom footer content.'
note: use querySelector with a class instead of getElementByTagName
Cheers! 🍻

Before asking this question, I had searched for Python includes without any luck, so I stopped there, but after asking this question, I thought that I should search for Perl/Ruby includes. Today, I found out that I can use the Perl use function, so I could study that and try to implement it although I am completely new to Perl. Ruby also appears capable, perhaps even more. I have no experience with Ruby either, but maybe I should start there.

I just figured out that getElementsByTagName() results in an array, so I have to refer to the footer's index with [0]:
var footerTags = document.getElementsByTagName('footer');
footerTags[0].innerHTML = "test";

php remove single variable value pair from querystring

I have a page that lists out items according to numerous parameters ie variables with values.
listitems.php?color=green&size=small&cat=pants&pagenum=1 etc.
To enable editing of the list, I have a parameter edit=1 which is appended to the above querystring to give:
listitems.php?color=green&size=small&cat=pants&pagenum=1&edit=1
So far so good.
When the user is done editing, I have a link that exits edit mode. I want this link to specify the whole querystring--whatever it may be as this is subject to user choices--except remove the edit=1.
When I had only a few variables, I just listed them out manually in the link but now that there are more, I would like to be able programmatically to just remove the edit=1.
Should I do some sort of a search for edit=1 and then just replace it with nothing?
$qs = str_replace("&edit=1, "", $_SERVER['QUERY_STRING']);
<a href='{$_SERVER['PHP_SELF']}?{$qs}'>return</a>;
Or what would be the cleanest most error-free way to do this.
Note: I have a similar situation when going from page to page where I'd like to take out the pagenum and replace it with a different one. There, since the pagenum varies, I cannot just search for pagenum=1 but would have to search for pagenum =$pagenum if that makes any difference.

You can use parse_str() to parse the query string, remove the unwanted parts and build the new one via http_build_query() like this
parse_str($_SERVER['QUERY_STRING'], $params);
unset($params['edit']);
$new_query_string = http_build_query($params);

Dashboard widget: getting version number from Info.plist

I'm writing a Dashboard widget in Dashcode, and on the back side, I've got a string for credits. I want to include the widget's version number in that string, but if possible, I want to programmatically grab it from the CFBundleVersion or CFBundleShortVersionString key in Info.plist to avoid having to change the number in multiple places if and when I update the widget.
Searches on Apple's developer documentation, Google and various forums have proven fruitless so far. What I'd like to know is whether there's a built-in way to do this that Apple included but forgot to mention (like var version = widget.version(); or something), or whether my script will have to pull in and parse the entire plist before plucking out the one value I actually want.
Thanks for any help you can provide!

I seem to have found the answer: use Dashcode's "data source" facility to read in Info.plist as an XML data source. From there, this blog post showed me how to traverse the plist's structure and get the correct string (in this case, the fifth <string> element in the file, corresponding to CFBundleShortVersionString.
The function I ended up with:
function getWidgetVersion() {
var dataSource = dashcode.getDataSource("infoPlist");
var version = dataSource.selection().valueForKey("dict").valueForKey("string")[4]; // This line and the previous could probably be combined for the sake of brevity
if (typeof(version) == 'string') {
document.getElementById("creditsLabel").innerHTML += version; //I'll change this to just pass the number on
}
}
Since the text of the creditsLabel div has already been started off with a localized string, I get a nice little label saying "Version 1.0".

Javascript: Hijack Copy?

I was just reading the Times online and I wanted to copy a bit of text from the article and IM it to a friend, but I noticed when I did so, it automatically appended the link back to the article in what I had copied.
This is not a feature of my IM client, so I assume this happened because of some javascript on Times website.
How would I accomplish this if I wanted to implement it on my site? Basically, I would have to hijack the copy operation and append the URL of the article to the end of the copied content, right? Thoughts?
Here's the article I was reading, for reference: http://www.time.com/time/health/article/0,8599,1914857,00.html

It's a breeze with jQuery (which your referenced site is using):
$("body").bind('copy', function(e) {
// The user is copying something
});
You can use the jQuery Search & Share Plugin which does this exact thing whenever somebody copies more than 40 chars from your site: http://www.latentmotion.com/search-and-share/
The site that you referenced is apparently using a service called Tynt Insight to accomplish this though.

They are using the free service Tynt. If you want to accomplish the same thing, just use the same service.

What browser are you using (and what version)?
In some newer browsers, the user is either asked if a website can access the clipboard, or its simply not allowed. In other browsers (IE 6, for example), it is allowed, and websites can easily read from and write to your copy clipboard.
Here is the code (IE only)
clipboardData.setData("Text", "I just put this in the clipboard using JavaScript");

The "Copy & Paste Hijacker" jQuery plugin does exactly what you want and seems better suited for your purposes than Tynt or Search & Share: http://plugins.jquery.com/project/copypaste
You can easily format the copied content, specify max or min characters, and easily include the title of the page or the URL in the copied content exactly where you want.

I recently noticed this on another website and wrote a blog post on how it works. The jQuery example doesn't seem to actually modify what the user copies and pastes, it just adds a new context menu.
In short:
var content = document.getElementById("content");
content.addEventListener("copy", oncopy);
function oncopy() {
var newEl = document.createElement("p");
document.body.appendChild(newEl);
newEl.innerHTML = "In your copy, messing with your text!";
var selection = document.getSelection();
var range = selection.getRangeAt(0);
selection.selectAllChildren(newEl);
setTimeout(function() {
newEl.parentNode.removeChild(newEl);
selection.removeAllRanges();
selection.addRange(range);
}, 0)
}
The setTimeout at the end is important as it doesn't seem to work if the last part is executed immediately.
This example replaces your selected text at the last minute with my chosen string. You can also grab the existing selection and append whatever you like to the end.