How To Use This.id In Function

Instead of assigning variable for this.id, does anyone know the syntax of how would I pass this.id into findIndex function? listing.slideUp(500, function() { var listing_id = t

Solution 1:

If you have to use a browser that does not support arrow functions (=>) then an alternative is to bind the this to the method. Ref. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind

var object = {
  id: 'c'
};

console.log(
  $('div').filter(
    function(index, element){
      return element.id == this.id;
    }.bind(object)
  ).get()
);

<scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><divid="b"></div><divid="c"></div><divid="d"></div>

Otherwise you can just us an arrow function, which does not change the context of the this. Ref. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions

var array = ['a', 'c', 'e'];

$('div').on('click', function(){
  array.forEach(id => {
    if (id == this.id) {
      console.log(this);
    }
  });
});

<scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><divid="b">b</div><divid="c">c</div><divid="d">d</div>