JavaScript/jQuery check that array contains all a certain value?

Question

Using JavaScript or jQuery, I want to check through an array to make sure all items have a certain value. So for example, if I am checking for "active" in the following arrays, I want:

["active"] => true
["active", "active", "active"] => true
["active", "pending", "active", "active"] => false
["pending"] => false

What's the simplest way to accomplish this?

Loop through the array and compare each value to the first (zeroth) value. If they're different, the test is false. — Blazemonger
– Blazemonger, Commented Nov 3, 2015 at 21:34

Javier Conde · Accepted Answer · 2015-11-03 21:38:27Z

7

You can use the JS Array function called every:

array.every(function(x) { return x == "active"; });

This will return true only if every element in array equals active.

answered Nov 3, 2015 at 21:38

Javier Conde

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2 Comments

fi0rini Over a year ago

Just make sure this is Compatible with what you are developing for.

bknights Over a year ago

array.every is implemented in most modern browsers and IE9+. Underscorejs is useful if you need to support IE7+. If you want to avoid all libraries go with @Blazemonger 's suggestion.

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