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JavaScript jQuery Basics (2014) Creating a Spoiler Revealer Perform: Part 2

Adding a class or ID to an append element

How can I add a class or ID to an append element... for example if I have this code: $(".demo-pricing").append("<button>Botoncillo</button>");

and I want to add a class or id to that append button

$(".demo-pricing").append("<button class="btn">Botoncillo</button>");

2 Answers

The content you want to append will have to be wrapped in an element for the append method to work.

So: $(".demo-pricing").append("<span>Botoncillo</span>"); or something like that.

And if you assign that selector to a variable, you can use .addClass to add a class later on, or .attr to add an id.

Take a look at this CodePen for a more detailed example.

James Barnett
James Barnett
39,199 Points

Adding a class is pretty common and it's easy to do in jQuery, but adding an id sounds like more trouble than it's worth.

It's not as common as adding a class, but it's not unheard of either, especially when you're dealing with multiple appends that depend on some comparison.

Adding a class happens mostly for dynamically adding/changing styling to an element. Adding IDs is used for all kinds of logic-oriented tasks in JS.

James Barnett
James Barnett
39,199 Points

I get the use case of adding elements into the dom and if you wanted those elements you added to be accessible via JS logic then giving them an ID would make sense. But adding/removing ids to turn on/off logic sounds like more trouble then it's worth considering you are using jQuery so you can just use a class selector.

Honestly, that way of thinking seems to be following the trend of abandoning IDs altogether in favour of classes. A couple of years ago there were a lot of blogs/individuals/magazines telling us how IDs were evil and should be avoided like the plague and classes were amazing and great, when in fact, a class is just that. It's a class of elements that follow the same behaviour/styling/rules. An ID on the other hand identifies and through the use of a selector selects a specific single element.

Throwing around classes is convenient, but that doesn't mean it's the right thing to do.

Not to mention, if you're really building something massive in JavaScript, you might appreciate the fact that ID selectors are faster than class selectors.

Anyway, for styling purposes, which seems to be the objective here, I don't support adding IDs, that's just silly, but Jaime Garay asked about it, so I threw in an example.

A big discussion here haha, thank you so much guys...It's a big help! :D Thanks Dino Paškvan for the example code!!