how to check if all object keys has false values

Question

JS Object:

var saver = {         title: false,         preview: false,         body: false,         bottom: false,         locale: false }; 

The question is how to check if all values is false?

I can use $.each() jQuery function and some flag variable, but there may be a better solution?

Answer 1

Updated version. Thanks @BOB for pointing out that you can use values directly:

Object.values(obj).every((v) => v === false) 

Also, the question asked for comparison to false and most answers below return true if the object values are falsy (eg. 0, undefined, null, false), not only if they are strictly false.

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This is a very simple solution that requires JavaScript 1.8.5.

Object.keys(obj).every((k) => !obj[k]) 

Examples:

obj = {'a': true, 'b': true} Object.keys(obj).every((k) => !obj[k]) // returns false  obj = {'a': false, 'b': true} Object.keys(obj).every((k) => !obj[k]) // returns false  obj = {'a': false, 'b': false} Object.keys(obj).every((k) => !obj[k]) // returns true 

Alternatively you could write

Object.keys(obj).every((k) => obj[k] == false) Object.keys(obj).every((k) => obj[k] === false)  // or this Object.keys(obj).every((k) => obj[k])  // or this to return true if all values are true 

See the Mozilla Developer Network Object.keys()'s reference for further information.