The find()
method returns the value of the first element in an array that pass a test (provided as a function).
The find() method executes the function once for each element present in the array:
If it finds an array element where the function returns a true value, find() returns the value of that array element (and does not check the remaining values)
Otherwise it returns undefined
Syntax and Usage
array.find(function(currentValue, index, arr),thisValue)
Parameter Values
function(currentValue, index, arr) Required. A function to be run for each element in the array.
Function arguments:
Argument Description
currentValue Required. The value of the current element
index Optional. The array index of the current element
arr Optional. The array object the current element belongs to
thisValue Optional. A value to be passed to the function to be used as its "this" value.
If this parameter is empty, the value "undefined" will be passed as its "this" value
Let's start
Example(1)
1.Create array elements
var Numbers = [3, 10, 18, 20];
2.Now implement code to find data which is equal to 18
function check_given_number(num) {
return num >= 3;
}
function myFunction() {
document.getElementById("demo").innerHTML = Numbers.find(check_given_number);
}
<script>
var ages = [4, 12, 16, 20];
function checkAdult(age) {
return age >= document.getElementById("ageToCheck").value;
}
function myFunction() {
document.getElementById("demo").innerHTML = ages.find(checkAdult);
}
</script>
In above Example Get the value of the first element in the array that has a value above a specific number
Complete Code Of Array Find Method In JavaScript With Example
<!DOCTYPE html>
<html>
<head>
<title>How To Use Array Find Method In JavaScript</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
</head>
<style>
body{
color:white;
background: black;
}
</style>
<body>
<div class="container">
<br>
<br>
<div class="text-center">
<h1>Array Find Method In JavaScript</h1>
</div>
<br>
<button class="btn btn-primary" onclick="myFunction()">Click it</button>
<h1 id="demo"></h1>
<br>
</div>
</body>
</html>
<script>
var Numbers = [3, 10, 18, 20];
function check_given_number(num) {
return num >= 3;
}
function myFunction() {
document.getElementById("demo").innerHTML = Numbers.find(check_given_number);
}
</script>