Underscore.JS has方法

_.has(object, key)

var _ = require('underscore');

var student = {name: 'Sam', age: 10 }

// Example 1: Check existing key
console.log(_.has(student, 'name'));

// Example 2: Check non-existing key
console.log(_.has(student, 'marks'));

>node tester.js

true
false