Which characters are permissible for the id attribute to prevent the jQuery selector from throwing an exception?

Question

Which characters are permissible for the id attribute to prevent the jQuery selector from throwing an exception?

I am facing a situation where the id attribute is inputted by an end user. For instance, if the id for a textbox is "11_=11" as entered by the user, then the HTML code will appear like this:

<input type="text" id="11_=11">

The corresponding jQuery selector would be:

$("#11_=11")

However, this results in an error as an unrecognized expression. I could limit the characters that the user can enter for the id attribute, but I am unsure of which characters are causing issues with the jQuery selector. Can you please provide some guidance?

javascript jquery css html

Answer 1

Answer №1

In order to include special characters in your code, you must remember to escape them using double backslashes

If you want to use any meta-characters (such as !"#$%&'()*+,./:;<=>?@[]^`{|}~) as part of a name, you need to escape them with two backslashes: \\. For instance, if you have an element with the id "foo.bar," you can select it using $("#foo\\.bar"). The W3C CSS specification provides detailed guidelines on valid CSS selectors. You may also find Mathias Bynens' blog post on CSS character escape sequences for identifiers helpful.

Therefore, your code should look like this: $("#11_\\=11")

Answer 2

In order to include special characters in your code, you must remember to escape them using double backslashes

If you want to use any meta-characters (such as !"#$%&'()*+,./:;<=>?@[]^`{|}~) as part of a name, you need to escape them with two backslashes: \\. For instance, if you have an element with the id "foo.bar," you can select it using $("#foo\\.bar"). The W3C CSS specification provides detailed guidelines on valid CSS selectors. You may also find Mathias Bynens' blog post on CSS character escape sequences for identifiers helpful.

Therefore, your code should look like this: $("#11_\\=11")

Which characters are permissible for the id attribute to prevent the jQuery selector from throwing an exception?

Answer №1

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