How does I add ID to the parameter

Question

as the code shown below:
https://code.sololearn.com/WyJoZ6wKcZ15/?ref=app

Answer 1

You could use dataset attribute, eg.
<button class="btn" data-id="a">A button</button>
<button class="btn" data-id="b">B button</button>

in JavaScript, you could get the data attribute by
const el = document.querySelectorAll('.btn');
alert(el[0].dataset.id); // output 'a'
alert(el[1].dataset.id); // output 'b'

Answer 2

Could it be possible you use a variable which does not exist? The variable letters is not declared somewhere

Answer 3

thank you so much

Answer 4

thank you . i try to use target.id or event.target instead .

Answer 5

thanks in advance ,for helping me in my school project

Answer 6

You wanna add an id to what?

Answer 7

add the id of the alphabet button to the function name call check(letter)

Answer 8

You mean the ID should be the parameter?

Answer 9

yup

Answer 10

No problem:)

Answer 11

I'd suggest to use a real IDE such as Webstorm,which Highlights mistakes like this.