Opal-Estate-Pro/node_modules/es5-ext/object/first-key.js
2019-09-13 11:27:52 +07:00

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;
};