jQuery不更新DOM元素HTML

Question

I'm trying to do a up/down vote system, but when I get the response from the API, I can't seem to target the element I want, which is the span within li with a class of "score".

My js handlers

    jQuery(document).ready(function($) {
    function vote(obj, post_id,vote) {
        if(vote && post_id) {

             $.get('/ajax/vote', { 
                v: vote,
                p: post_id
                }, function(data){
                    //set the .score to the new count returned by API
                    console.log(data);
                    $(obj).child('li.score').html(data.votes);
             });
        }
    }
    $(document.body).on("click", ".upvote", function(obj){ 
        console.log("Up Voted");

        var post_id = $(this).closest(".card").prop('id').replace(/post-id-/, '');
        vote(obj,post_id,1); 
    });

    $(document.body).on("click", ".downvote", function(){
        console.log("Down Voted");
        // more to come
    });
});

The html view that is trigging the event, and the "score" area that's under it.

        <div class="vote-controls col-xs-1">
        <ul>
            <li class="upvote"><a href="#" class="disable"><span class="fa fa-angle-up "></span><span class="sr-only">&uarr;</span></a></li>
            <li class="downvote"><a href="#" class="disable"><span class="fa fa-angle-down"></span><span class="sr-only">&darr;</span></a></li>
            <li class="score"><span>0</span></li>
        </ul>
    </div>

Answer 1

li.score is not a child of the obj . Given that object is actually the DOM object clicked on by passing $(this) to the function then I guess it should be:

$(obj).parent('ul').children('li.score').html(data.votes);

Answer 2

The issue is that obj is an Event object not your HTML element. Also, there is no child method. Use children :

Change this line:

vote(obj, post_id, 1);

to:

vote($(this).parents('ul'), post_id, 1);

This should pass the ul to your vote() function.

And change:

$(obj).child('li.score').html(data.votes);

to:

$(obj).children('li.score').html(data.votes);

Answer 3

obj是事件对象，这是您想要做的

$(obj.currentTarget).siblings('li.score').find('>span').text(html.votes);