What are HTML attributes?
HTML is made up of elements which help define the structure of a web page, Elements of the same type possess the same behavior across a web page. One way to make an element behave differently is by adding properties to them. One of the ways to add a property to an HTML element is using the attributes, for example, you can add CSS styles to elements using selector attributes like classes, ids, and names.
Working with selectors
Usually, classes are used to add styles to elements simply because an element can have multiple classes and multiple elements can have the same classes, meaning you can apply multiple styles to an element as well as apply one style to different elements. Names are usually used with input elements to not only mark as the key for the data they collect and send to the server but also sometimes for applying targeted styles. More than one input can share a name, the reason being that you may have more than one form within a page.
The ID attribute
Ids, unlike classes and names, should be assigned to only one element, its meant to serve as a unique identifier for accessing elements. But based on the specification most browsers convert ids into variables meaning you have access to the DOM of that particular element.
Also at first glance, this might be seen as an easier way to access the DOM of any element with just the id name without having to use query selectors. But this is a bad idea as a browser like Firefox discourages the use of this. It's much safer to just go with query selectors.
A simple solution
Unfortunately, the conversion of ids into variables is something that is out of your control, but you can gain back that control, one way is to use invalid variable names as id names, this way there is no way it will conflict with your variables in the global scope. But sometimes you can’t due to a naming conversation or some other reason, in which case the best option is to try to use fewer ids where and when possible.
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