Cannot read property 'charAt' of undefined wordpress theme [closed] - javascript

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Can anyone please help me in understanding what am i doing wrong here. Downloaded a theme for a client and the whole theme is breaking due to: Cannot read property 'charAt' of undefined.
screenshot of issue:

You could try this one:
String(that.attr('href')).charAt(0) == '#'
I suppose that this is happening because your value is not a string and charAt is a method that returns the character at the specified index in a string.

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JavaScript, what is "binde" means, not "bind"? document.binde.tagname...? [closed]

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I have in my JS code, some lines with binde, what is it? Why is it working and what does it mean?
On example with, type="checkbox":
if (document.binde.nameofthecheckbox.checked)
{
//...its true whens checked and do the code
}
or
somevar = document.binde.somehtmltagname.value;
somevar gets the value of "somehtmltagname"
No one can answer me, I only heard "never seen something like that before". I would be happy to know what it is, and not only using it because it works.
It is not well known, but document might define HTML elements with id specified as document[HTMLElement.ID] as such, if there is an <input id="binde"> on the page, it will point to that.
If not, try logging it:
console.log(document.binde)

problem with trying to return an API not sure whats missing from my code but the console sells error in javascript line 15 [closed]

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The console tells me that in line 15 of my javascript there is an error but i am unsure of what it is. My button i created in html does not return my api facts and I am using a cord extension as well.
You need to separate each object property with a comma.

The email address is badly formatted. I don't know what's wrong with this can someone help me. [closed]

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Closed 4 years ago.
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Code is not working, I dont know what was the problem
It looks like the email format is reliant on the element in the page with id = 'emailAddress'. Check that it is in the correct format.
Also, if it doesn't run, try changing the last line from:
}());
To:
})();

A Mistake in my Codecademy Codebit, Not Sure What [closed]

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I do NOT have code here, as for it is going to take up too much space. It is an error in JavaScript as for it won't run anything in it, aswell as jQuery.
Click here if you wanna live...
Your problem is here I think:
.replace('function mName1()'),('?Method??-Custom?','function')
that comma needs to be a period and I'm guessing replace needs called.
.replace('function mName1()').replace('?Method??-Custom?','function')

Don't understand how Google's infinite load example works [closed]

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Closed 8 years ago.
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Would anyone be willing to explain how the following example works?
http://scrollsample.appspot.com/items
I don't understand how the URL gets updated (changes from /items?page=2 to /items?page=3)
I also do not understand how the rel tags get updated either (prev/next/canonical)
Thanks for any help you can provide.
Check out http://scrollsample.appspot.com/static/main.js
and look for the initPaginator function. There's a call to history.replaceState.
history.replaceState allows you to update the address bar without a page change.

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