Skip to content
Related Articles

Related Articles

Improve Article
JavaScript Array find() Method
  • Last Updated : 23 Jun, 2020

Below is the example of the Array find() method to find a positive number.

  • Example:




    <script>
        // input array contain some elements.
        var array = [-10, -0.20, 0.30, -40, -50];
      
        // method (return element > 0).
        var found = array.find(function (element) {
            return element > 0;
        });
      
        // Printing desired values.
        document.write(found);
    </script>
  • Output:
    0.3

The arr.find() method is used to get the value of the first element in the array that satisfies the provided condition. It checks all the elements of the array and whichever the first element satisfies the condition is going to print.

Syntax:

array.find(function(currentValue, index, arr),thisValue)

Parameters: This method accepts five parameters as mentioned above and described below:

  • function: It is the function of the array that works on each element.
  • currentValue: This parameter holds the current element.
  • index: It is an optional parameter that holds the index of current element.
  • arr: It is an optional parameter that holds the array object the current element belongs to.
  • thisValue: This parameter is optional, if a value to be passed to the function to be used as its “this” value else the value “undefined” will be passed as its “this” value.

Return value: It returns the array element value, if any of the elements in the array which satisfy the condition, otherwise it returns undefined.



Below examples illustrate the JavaScript Array find() method in JavaScript:

Example 1: Here the arr.find() method in JavaScript returns the value of the first element in the array that satisfies the provided testing method.




<script>
    // input array contain some elements.
    var array = [10, 20, 30, 40, 50];
  
    // method (return element > 10).
    var found = array.find(function (element) {
        return element > 20;
    });
  
    // Printing desired values.
    document.write(found);
</script>

Output:

30

Example 2: Whenever we need to get the value of the first element in the array that satisfies the provided testing method at that time we use arr.find() method in JavaScript.




<script>
    // Input array contain some elements.
    var array = [2, 7, 8, 9];
  
    // Provided testing method (return element > 4).
    var found = array.find(function (element) {
        return element > 4;
    });
  
    // Printing desired values.
    document.write(found);
</script>

Output:

7

Supported Browsers: The browsers supported by JavaScript Array find() method are listed below:

  • Google Chrome 45.0
  • Microsoft Edge 12.0
  • Mozilla Firefox 25.0
  • Safari 7.1
  • Opera 32.0



My Personal Notes arrow_drop_up
Recommended Articles
Page :