Difference between id and name attributes in HTML
What is the difference between the id and name attributes? They both seem to serve the same purpose of providing an identifier.
I would like to know (specifically with regards to HTML forms) whether or not using both is necessary or encouraged for any reasons.
The name attribute is used when sending data in a form submission. Different controls respond differently. For example, you may have several radio buttons with different id attributes, but the same name . When submitted, there is just the one value in the response - the radio button you selected.
Of course, there's more to it than that, but it will definitely get you thinking in the right direction.
Use name attributes for form controls (such as <input> and <select> ), as that's the identifier used in the POST or GET call that happens on form submission.
Use id attributes whenever you need to address a particular HTML element with CSS, JavaScript or a fragment identifier. It's possible to look up elements by name, too, but it's simpler and more reliable to look them up by ID.
Here is a brief summary:
id is used to identify the HTML element through the Document Object Model (via JavaScript or styled with CSS). id is expected to be unique within the page.
name corresponds to the form element and identifies what is posted back to the server .
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