How can I remove and add any id by pure JavaScript? Like
document.querySelector('div').classList.add('newClass') ;
and
document.querySelector('div').classList.remove('oldClass') ;
Since ids are single strings it's just a matter of setting and unsetting it:
document.querySelector('div').id = 'whatever';
and to remove, just remove the attribute:
document.querySelector('div').removeAttribute('id');
There are plenty of ways to achieve this, to add new id:
document.querySelector('div').id = 'id_you_like';
document.querySelector('div').setAttribute("id", "id_you_like");
to remove the id attribute:
document.querySelector('div').removeAttribute('id');
document.querySelector('div').setAttribute("id", "");
Although you can set an empty(null) id for elements, it is not a good practice.
According to the W3C :
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").
If you use jQuery
:
$('div').attr('id', 'id_you_like');
$('div').removeAttr('id');
Something like this,
document.getElementById("before").id = "newid"; console.log(document.getElementById("newid").id) //or document.querySelector('div').id="newid"
<div id="first"> </div>
To create an element an assign id
var div = document.createElement('div');
div.id = 'myId';
Or you can try if x is your element. set your attribute Id
x.setAttribute('id','myCoolElement')
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