JavaScript Array every() Method

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JavaScript Array every() Method

The every() method tests whether all elements in the array pass the test implemented by the provided function.

Note: This method does not alter the original array.


HTML Online Editor
<!DOCTYPE html> <html> <body> <p>Is Smith passed all exams?</p> <script> var john = [55, 95, 33, 75]; var smith = [70, 80, 48, 95]; var passMark = 45; function checkPass(mark) { return mark >= passMark; } document.write(smith.every(checkPass)); </script> </body> </html>


Array.every(function(value, index, arr), thisArg); //or Array.every(functionName);

Parameter Values

function(value, index, arr)RequiredFunction to test for each element in an array.
Value - Specifies a value or element in an array.
index - Specifies the index of a value or element in an array.
arr - Specifies the whole array.
thisArgOptionalSpecifies a value against which each element in an array is tested.

Return Values

trueIf every element in an array passes the test.
If the given array is empty.
falseIf any of the elements in an array fails the test.


HTML Online Editor
<!DOCTYPE html> <html> <body> <p>Is John passed all exams?<p> <script> var john = [55, 95, 33, 75]; var smith = [70, 80, 48, 95]; var passMark = 45; function checkPass(mark, index, arr) { return mark >= this; } document.write(john.every(checkPass, passMark)); </script> </body> </html>


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