动态按钮 ID - Javascript

Question

I have a number of buttons generated from a for loop as follows and the id = like:

<button type="submit" id = "like" class="btn btn-custom btn-sm like"><span id="tx-like">Like</span></button>

I have a script that changes the "like" to "unlike" and "unlike" to "like", it gets element by Id:

$( function() {
        $('#like').click( function() {
            var t = $("#tx-like").html();
            if(t == 'Like'){
                $("#tx-like").html("Unlike");
            }else{
                $("#tx-like").html("Like");
            }
        } );
    } );

This is only functional on the first button since it taking the id. How I can get it functional on all buttons that are generated dynamically?

Answer 1

As said in comments above, you should not have multiple IDs in the same page. You could use classes instead, but even if it would work, there is a better approach which is to use data-attributes .

 // Retrieves all your elements using the `data-like` attribute. const likes = document.querySelectorAll('[data-like]'); // For each element as `el` likes.forEach(el => { el.addEventListener('click', () => { // Get its `data-like` value. const { like } = el.dataset; // If the value is 'false': if (like === 'false') { el.innerText = 'Dislike'; el.dataset.like = 'true'; return; } // Else... el.innerText = 'Like'; el.dataset.like = 'false'; }); });

 /* You can easily customize your elements according to their current state. */ .like[data-like="true"] { border: solid 1px green; } .like[data-like="false"] { border: solid 1px red; }

 <!-- Remove duplicate IDs and use `data-like` instead. --> <button type="submit" class="btn btn-custom btn-sm like" data-like="false">Like</button> <button type="submit" class="btn btn-custom btn-sm like" data-like="false">Like</button>