How To Check/remove An Element?

I want to remove a tag either by pressing backspace button (when the input is focused) or by clicking on that tag. Now I'm talking about the first option. Also I need to set it a

Solution 1:

You'd have better to toggle a class and check for it, e.g:

$(function() {

  $("#tags input").on({
    focusout: function() {
      var txt = this.value.replace(/[^a-z0-9\+\-\.\#]/ig, ''); // allowed charactersif (txt) $("<span/>", {
        text: txt.toLowerCase(),
        insertBefore: this
      });
      this.value = "";
    },
    keyup: function(ev) {
      // if: comma|enter (delimit more keyCodes with | pipe)if (/(188|13|32)/.test(ev.which)) {
        $(this).focusout();
      } elseif (/(8)/.test(ev.which) && this.value == '' && $(this).prev("span").hasClass('toRemove')) { //<< check for class
        $(this).prev("span").remove();
      } elseif (/(8)/.test(ev.which) && this.value == '') {
        $(this).prev("span").addClass('toRemove'); //<< add class
      } else {
        $(this).prevAll('.toRemove').removeClass('toRemove'); //<< remove class on keyup
      }
    }
  });
  $('#tags').on('click', 'span', function() {
    $(this).remove();
  });

});

#tags {
  float: right;
  border: 1px solid #ccc;
  padding: 5px;
  font-family: Arial;
}
#tags > span {
  cursor: pointer;
  display: block;
  float: right;
  color: #3e6d8e;
  background: #E1ECF4;
  padding: 5px;
  padding-right: 25px;
  margin: 4px;
}
#tags > span:hover {
  opacity: 0.7;
}
#tags > span:after {
  position: absolute;
  content: "×";
  border: 1px solid;
  padding: 2px5px;
  margin-left: 3px;
  font-size: 11px;
}
#tags > input {
  direction: rtl;
  background: #eee;
  border: 0;
  margin: 4px;
  padding: 7px;
  width: auto;
}
.autocomplete {
  display: none;
}
#tags > span.toRemove {
  background-color: red;
}

<scriptsrc="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script><divid="tags"><span>php</span><span>html</span><inputtype="text"value=""placeholder="Add a tag" /><divclass="autocomplete"></div></div>

Solution 2:

I built in a counter for you that checks the status of your keypress. If you press once the counter is 1 and if you press the second time it removes the element and is 0 again. I hope thats what you wanted. Check this:

$(function() {

  counter = 0;

  $("#tags input").on({
    focusout: function() {
      var txt = this.value.replace(/[^a-z0-9\+\-\.\#]/ig, ''); // allowed charactersif (txt) $("<span/>", {
        text: txt.toLowerCase(),
        insertBefore: this
      });
      this.value = "";
      $("#tags span").css('background-color', '#E1ECF4');
      counter = 0;
    },
    keyup: function(ev) {
      // if: comma|enter (delimit more keyCodes with | pipe)if (/(188|13|32)/.test(ev.which)) {
        $(this).focusout();
      } elseif (/(8)/.test(ev.which) && this.value == '') {
        counter = counter + 1;
        if (counter == 1) {
          $(this).prev("span").css('background-color', 'Red');
        } else {
          $(this).prev("span").remove();
          counter = 0;
        }
      }
    }
  });
  $('#tags').on('click', 'span', function() {
    $(this).remove();
      $("#tags span").css('background-color', '#E1ECF4');
      counter = 0;
  });

});

https://jsfiddle.net/4swtduae/7/