how to check if array is empty in jQuery?

If required for jQuery check if array is empty or undefined or null then We shall help you. you can simply check if array is empty or not in jQuery/javascript. we shall use simple if condition and length of array with checking. so we can simply check if array is empty or null or undefined in javascript or jQuery functions. Question: jquery is not empty, jquery is empty, google scripts check if array is empty

check if array is empty or null or undefined in jQuery/javascript?

Here We shall give you simple demo with example with multiple example therefor you can use any one from there. We shall recommend you that you can help this single case as following simple source code:

4 ways To check if array for Jquery Array

  • Simple Checking with Jquery Array
  • Checking with empty array
  • Checking with undefined array
  • Checking with null array
  • check if array has empty values javascript
  • check Object is empty or not in Jquery
  • check Object is empty or not in typescript
  • check if variable is empty array typescript
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Syntax:

Array.isArray(userInfoArr) && userInfoArr.length

if (userInfoArr && userInfoArr.length > 0) {
   console.log('userInfoArr is not empty.');
}else{
   console.log('userInfoArr is empty.');
}

You can also Know to following complete example with source code for checking jquery array if empty. So let’s following source code as well as also check results as We attached following:

jQuery check if array is empty Example:

<!DOCTYPE html>
<html>
<head>
</head>
<body>
  
<script type="text/javascript">
   
    /*
      Simple Testing for Jquery Array
    */
    var userInfoArr = [8, 9, 10];
  
    if (userInfoArr && userInfoArr.length > 0) {
        console.log('userInfoArr is not empty.');
    }else{
        console.log('userInfoArr is empty.');
    }
  
  
    /*
      Simple Testing with empty array for Jquery Array
    */
    var userInfoArr2 = [];
  
    if (userInfoArr2 && userInfoArr2.length > 0) {
        console.log('userInfoArr2 is not empty.');
    }else{
        console.log('userInfoArr2 is empty.');
    }
  
  
    /*
      Simple Testing with undefined array for Jquery Array
    */
    if (typeof userInfoArr3 !== 'undefined' && userInfoArr3.length > 0) {
        console.log('userInfoArr3 is not empty.');
    }else{
        console.log('userInfoArr3 is empty.');
    }
  
  
    /*
      Simple Testing with null array for Jquery Array
    */
    var userInfoArr4 = null;
   
    if (userInfoArr4 && userInfoArr4.length > 0) {
        console.log('userInfoArr4 is not empty.');
    }else{
        console.log('userInfoArr4 is empty.');
    }
   
</script>
</body>
</html>

Output:

userInfoArr is not empty.
userInfoArr2 is empty.
userInfoArr3 is empty.
userInfoArr4 is empty.

check Object is empty or not in Jquery

if($.isEmptyObject(userInfoObjects)){
   alert("This userInfoObjects is empty.");
}else{
  alert("This userInfoObjects is not empty.");
}

check Object is empty or not in JavaScript

if (userInfoObjects && userInfoObjects instanceof Array && !userInfoObjects.length) {
   console.log('This userInfoObjects is empty.');
} else {
   console.log('This userInfoObjects is not empty.');
}

javascript is array empty

var productInfoArr=[];
if(!productInfoArr.length){
	// productInfoArr are empty
}else{
	// productInfoArr are not empty
}

Check if an array is empty or not in JavaScript

<!DOCTYPE html> 
<html> 
  
<head> 
</head> 
  
<body> 
    <h1 style="color: blue"> 
        Pakainfo.com 
    </h1> 
      
      
    <p>productInfoArr = []</p> 
    <p>magentoStoreInfoArr = undefined</p> 
    <p>userInfoArr = [1, 2, 3, 4, 5]</p> 
      
    <p> 
        Output for productInfoArr:  
        <span class="results-empty"></span> 
    </p> 
      
    <p> 
        Output for magentoStoreInfoArr:  
        <span class="results-non"></span> 
    </p> 
      
    <p> 
        Output for userInfoArr:  
        <span class="results-ok"></span> 
    </p> 
  
    <button onclick="checkArray()"> 
        Check Array 
    </button> 
      
    <script type="text/javascript"> 
  
        function checkArray() { 
            let productInfoArr = []; 
            let magentoStoreInfoArr = undefined; 
            let userInfoArr = [1, 2, 3, 4, 5]; 
  
            if (Array.isArray(productInfoArr) && productInfoArr.length) 
                results = true; 
            else 
                results = false; 
  
            document.querySelector('.results-empty').textContent = results; 
  
            if (Array.isArray(magentoStoreInfoArr) && magentoStoreInfoArr.length) 
                results = true; 
            else 
                results = false; 
  
            document.querySelector('.results-non').textContent = results; 
  
            if (Array.isArray(userInfoArr) && userInfoArr.length) 
                results = true; 
            else 
                results = false; 
  
            document.querySelector('.results-ok').textContent = results; 
        } 
    </script> 
</body> 
  
</html>          

Web Programming Tutorials Example with Demo

Read :

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