JavaScript Array every()
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Definition and usage
every()
The method checks if all elements in the array pass the test (provided as a function).
every()
The method executes the function once for each element in the array:
- If a false value returned by the function is found in the array element, every() returns false (and does not check the remaining values)
- If no false is encountered, every() returns true
Note:every()
Do not execute the function on array elements without values.
Note:every()
Do not change the original array.
Instance
Example 1
Check if all values in the age array are 18 or above:
var ages = [32, 33, 16, 40]; function checkAdult(age) { return age >= 18; } function myFunction() { document.getElementById("demo").innerHTML = ages.every(checkAdult); }
Example 2
Check if all values in the ages array are or exceed a specific number:
<p>Minimum age: <input type="number" id="ageToCheck" value="18"></p> <button onclick="myFunction()">Try it</button> <p>Su kogon kai tsakiya? <span id="demo"></span></p>