Uncaught TypeError: Object.values is not a function JavaScript

Question

I have a simple object like the one below:

var countries = {
    "Argentina":1,
    "Canada":2,
    "Egypt":1,
};

I need to create two arrays. The first array is an array of all the keys from the object. I created this array by:

var labels = Object.keys(countries);

This works well. I obtain an array of countries. Now when I try to create an array from the values...

var labels = Object.values(countries);

I get this error: Uncaught TypeError: Object.values is not a function JavaScript

I don't know what I am doing wrong. I console.log countries before and after I declare labels and the object remains the same. How do I properly use Object.values()?

Solution 1

.values is unsupported in many browsers - you can use .map to get an array of all the values:

var vals = Object.keys(countries).map(function(key) {
    return countries[key];
});

See MDN doc: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values or Official doc: https://tc39.github.io/ecma262/#sec-object.values (thanks @evolutionxbox for correction)

Solution 2

It's also worth noting that only Node versions >= 7.0.0 fully support this.

http://node.green

Solution 3

For those who ended up here and are using Angular, adding import 'core-js/es7/object'; to polyfills.ts file solved the problem for me.

/** IE9, IE10 and IE11 requires all of the following polyfills. **/
import 'core-js/es6/array';
import 'core-js/es6/date';
import 'core-js/es6/function';
import 'core-js/es6/map';
import 'core-js/es6/math';
import 'core-js/es6/number';
import 'core-js/es6/object';
import 'core-js/es6/parse-float';
import 'core-js/es6/parse-int';
import 'core-js/es6/regexp';
import 'core-js/es6/set';
import 'core-js/es6/string';
import 'core-js/es6/symbol';
import 'core-js/es6/weak-map';
import 'core-js/es7/array';
import 'core-js/es7/object'; // added import

Solution 4

Using "for...in" as discussed at mozilla: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_objects/Object/values

Here is the code I used:

function objectValues(obj) {
    let vals = [];
    for (const prop in obj) {
        vals.push(obj[prop]);
    }
    return vals;
}

// usage
let obj = {k1: 'v1', k2: 'v1', k3: 'v1'};

console.log(objectValues(obj));             // prints   the array  [ 'v1', 'v1', 'v1' ]
// OR
console.log(objectValues(obj).join(', '));  // prints   the string 'v1, v1, v1'

Solution 5

Looks like this issue is fixed in Safari latest version. I came around the same issue. This issue occurs in browser version 9.0.1 and does not occur in 10.1.1

Editing to add the attachments:

[snippet][1]
[object value][2]
[browser version][3]

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