Develop Reference

what is proper syntax for regex to get specific text from GTM attribute.response

I used Google Tag Manager to create a custom data level variable to get the content of an ajax form. The result is in the attributes.response that looks like:
response:"{\"current_url\":\"https:\\/\\/domainname.com\\/ +
"manufacturer\\/category\\/model-number\\/\",\"h" +
"tml"\":{\"cart_status_528\":\"\\n <div id=\\\"s" +
...
"<a href=\\\"https:\\/\\/domainname.com\\/manufacturer" +
"-name\\/long-store-category-name\\/model-number-x\\/\\" +
"\" class=\\\"ty-product-notification__product-name\\\"" +
">PRODUCT-NAME THAT I WANT<\\/a>\\n " +
...
" <p><\\n more escaped html content +
}"
I am trying to extract/parse the attribute.response to retrieve the PRODUCT-NAME text. I have tried the following which matches in regexr. But, GTM keeps complaining there is an error in my javascript at the double quote symbol. What am I missing? Or is there a cleaner way to retrieve the text? Thanks
function() {
var regex = (?<=product-name(.|\n)*">)(.*)(?=<\\\\\/a);
var attributesResponse = {{attributes.response}};
if(regex.test{{attributesResponse}}
var ProductAddedToCart = regex.exec(attributesResponse)[1];
return ProductAddedToCart;
}
return false;
}

First of all, please read the top answer here: RegEx match open tags except XHTML self-contained tags
Secondly, your JS has many problems. Even the SO code highlighter indicates it. See some examples of how regex is used in JS.
The proper way to solve your task, however, would be adding a dataLayer push with the proper response details neatly stored in a dataLayer object. You would normally ask your front-end developers to add a push in their response callback. It should be trivial for them to tackle. You can read more on DL here.

Using a variable as a classname

I am trying to put a class name stored in a variable into my JQuery where I want the class to be, this should change which class is affected depending on the parameter passed through the URL query string.
I have built the class name and stored it in the 'param' variable as below.
var param = '".' + "proj" + location.search.substring(6) + '"';
$(param).css('display', 'inline');
And want to change the css on the class inside of it but this does not seem to work for me. Perhaps because it tries to change the css of the variable rather than what is inside of it.
If not how can I solve this or if so, is there a better way I could go about this?

You're confusing a string literal to be only enclosed by double quotes ", while that is not the case. Remove them
var param = '.' + "proj" + location.search.substring(6);

Set the param variable as the location substring (assuming that this substring is correctly getting the desired result from your URL) - then use that in the jQuery by joining with the common portion as follows.
var param = location.search.substring(6);
$('.proj' + param).css('display', 'inline');
You will need to ensure that a) you have the jQuery library and b) you have the jquery code wrapped in a $(document).ready(function(){}) wrapper.
Also - its usually better to add / remove a class rather than directly affecting the CSS in the jquery
var param = location.search.substring(6);
$('.proj' + param).addClass('displayInline');
//CSS
.displayInline{display: inline}

Call javascript function error

I have a problem, i have to call a function from a button onclick().
Javascript :
function deleteFolder(elemento){
var form=document.getElementById(elemento);
var conf=confirm("Sei sicuro di eliminare questa cartella?\nL'eliminazione sara' definitiva");
if (conf === true)
form.submit();
}
This function get a paramater made by php ,the pRoblem is that if this parameter has some space inside, the function is not called ..
deleteFolder(FolderName) --> It works
deleteFolder(Folder Name) --> of course it doesnt works
From php i just scan directories and put names of them in multiple form with foreach() function.
So the question is :
1) How from php i can put parameter that works with calling javascript's function with spaces inside?
2) If i have a directory called "Folder's name", it's enough put addslashes in $_POST to bypass XSS? because it cut all next the apostrophe and became :
HTML
<button onclick="deleteFolder(Folder)">
Thanxs for any suggestions, i can't find anything similar already in this forum.

I am assuming that you are passing a string to the deleteFolder() method. If that is the case, use the following code.
<button onclick="deleteFolder('FolderName')">
<button onclick="deleteFolder('Folder Name')">
You should use quotes to indicate that you are passing a string to the function. This should fix your problem.

You can put the actual folder name in a separate attribute say folder-name and in the id have incremental numbers, with this being in place following change would be needed in your JavaScript function.
HTML
<button folder-name="Folder" onclick="deleteFolder(id)">
JavaScript
function deleteFolder(elemento){
var form=document.getElementById(elemento);
var folderName = form.getAttribute('folder-name');
// then use the folderName however you want it.
}

Thanxs to all replies ! =)
I solve it adding " (--> " ) in php
first
"<button onclick='deleteFolder(".$elem."); return false;'>Elimina</button>"
next
"<button onclick='deleteFolder("".$elem.""); return false;'>Elimina</button>"
So the parameter became a string and can be passed to the function =)

Javascript parameter passing single apostrophe

I'm inserting content with js, that includes an onclick call to a function. This function passes a parameter which contains a database entry, which could contain a ' .
var action = 'Share';
Trouble is that when name contains a single apostrophe it breaks the function call. I've tried doing a string replace on name to replace ' with ' but this seems to still be converted back to a ' by the browser.
Any idea how I can get around this?

Use escape() or after JavaScript version 1.5. use encodeURI() or encodeURIComponent() instead.

Don't write code by mashing strings together with other code. You've got JavaScript inside HTML inside JavaScript and it is a recipe for headaches.
Use DOM manipulation instead.
var a = document.createElement('a');
a.href = "#"; // You should use a button instead of a link to the top of the page
a.className = "facebook-share";
a.addEventListener('click', function () {
facebookWallPost(name);
});
a.appendChild(
document.createTextNode('Share');
);

Javascript bookmarklet...I think browser is replacing characters

I have this lovely javascript bookmarklet...
javascript:var nam="blablabla&name"; var els=document.getElementsByName(nam); if(els.length == 0) alert(nam); else els[0].click();
when I put that in I get this result:
blablabla)name
so basically I think the browser (or something) is automatically replacing the & with the ). I need it to not do that. I want whatever is between the "" after nam= to be sent exactly as is. How can I do that?

I think the problem is not the javascript-variable, it's the name-attribute. If you have there an entity it will be translated to the corresponding character. So if you really have a name like:
<a name="blablabla&name">
you'll have to set the variable to
var nam='blablabla&name';

You can't use " " while doing a bookmarklet, because those will close the attribute try to use ' ' instead