14 lines
287 B
JavaScript
14 lines
287 B
JavaScript
"use strict";
|
|
|
|
var value = require("./valid-value")
|
|
, objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;
|
|
|
|
module.exports = function (obj) {
|
|
var i;
|
|
value(obj);
|
|
for (i in obj) {
|
|
if (objPropertyIsEnumerable.call(obj, i)) return i;
|
|
}
|
|
return null;
|
|
};
|