check id jquery object is empty

Question

I'm trying to check if a jquery object is null to use it this way

var reminder_history_div = $(".history-container");
        if(reminder_history_div)
            reminder_history_div.scrollTop(reminder_history_div[0].scrollHeight);

but reminder_history_div is not null or empty its and object ,with some info ,what is the correct way to check if is empty?maybe:

if(reminder_history_div.length > 0)

no,only check if there is an object with class `.history-container` to make some action — afdi5, Apr 05 '19 at 13:20
Are you trying to select elements with jquery and then test if jquery returned na object or you just want to check if empty for any javascript object ? — Fourat, Apr 05 '19 at 13:24

score 1 · Answer 1 · answered Apr 05 '19 at 13:20

1

Example:

Check an object to see if it's empty.

jQuery.isEmptyObject({}); // true
jQuery.isEmptyObject({ foo: "bar" }); // false

answered Apr 05 '19 at 13:20

Jack Dorset

119
9

LucasLaurens · Answer 2 · 2019-04-05T13:57:35.180

1

check if your content is empty or not and if it exists

const reminder_history_div = $(".history-container").html(); //OR val() 

if(!reminder_history_div){
  console.log("empty");
} else {
    console.log("not empty");
}



if($(".history-container").length >= 1){
      console.log("exists");
    } else {
      console.log("don't exists")
    }

edited Apr 05 '19 at 13:57

answered Apr 05 '19 at 13:23

LucasLaurens

236
1
3
14

score 0 · Accepted Answer · answered Apr 05 '19 at 13:25

0

Use length to check if element is present or not refer Check if element exists in jQuery

$('.check').click(function(e){

if($('.history-container').length>0)
console.log('Div history-container exist')
else
console.log('Div history-container does not exist')

})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="history-container">
some text
</div>
<button class="check">Check</button>

answered Apr 05 '19 at 13:25

Deepak A

1,624
1
7
16

We don't answer duplicates, we use the built-in "vote/flag to close as such" – Asons Apr 06 '19 at 08:33

check id jquery object is empty

3 Answers3