CODEWITHSUNDEEP
javascript
napalias
napalias

Reputation: 1205

How to know if all javascript object values are true?

In JavaScript, I need to know if all object items are set to true.

If I have the following object:

var myObj = {title:true, name:true, email:false};

I could write something like this : 

 if(myObj.title && myObj.name && myObj.email){
 /*Some code */
};

But I am looking for the simplest way to write it. eg :

if(myObj all is true){
/*Some code */
};

I might have another object with 10-20 items inside it, and will need to know if all are true.

Upvotes: 81

Views: 102926

Answers (5)

elclanrs
elclanrs

Reputation: 94101

In modern browsers:

var allTrue = Object.keys(myObj).every(function(k){ return myObj[k] });

If you really want to check for true rather than just a truthy value:

var allTrue = Object.keys(myObj).every(function(k){ return myObj[k] === true });

Upvotes: 63

mhlavacka
mhlavacka

Reputation: 701

You can use every from lodash

const obj1 = { a: 1, b: 2, c: true };
const obj2 = { a: true, b: true, c: true }; 

_.every(obj1, true);  // false
_.every(obj2, true);  // true

Upvotes: 0

Nachiketha
Nachiketha

Reputation: 23555

With ES2017 Object.values() life's even simpler.

Object.values(yourTestObject).every(item => item)

Even shorter version with Boolean() function [thanks to xab] 

Object.values(yourTestObject).every(Boolean)

Or with stricter true checks 

Object.values(yourTestObject)
    .every(item => item === true)

Upvotes: 112

Mike Christensen
Mike Christensen

Reputation: 91618

How about something like:

    function allTrue(obj)
    {
      for(var o in obj)
          if(!obj[o]) return false;
        
      return true;
    }
    
    var myObj1 = {title:true, name:true, email:false};
    var myObj2 = {title:true, name:true, email:true};

    document.write('<br />myObj1 all true: ' + allTrue(myObj1));
    document.write('<br />myObj2 all true: ' + allTrue(myObj2));

A few disclaimers: This will return true if all values are true-ish, not necessarily exactly equal to the Boolean value of True. Also, it will scan all properties of the passed in object, including its prototype. This may or may not be what you need, however it should work fine on a simple object literal like the one you provided.

Upvotes: 39

Jordan Ramstad
Jordan Ramstad

Reputation: 179

Quickest way is a loop

for(var index in myObj){
  if(!myObj[index]){ //check if it is truly false
    var fail = true
  }
}
if(fail){
  //test failed
}

This will loop all values in the array then check if the value is false and if it is then it will set the fail variable, witch will tell you that the test failed.

Upvotes: 2

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