Lodash isUndefined method
语法
Checks if value is undefined.
参数
value (*) − The value to check.
输出
(boolean) − Returns true if value is undefined, else false.
实例
var _ = require('lodash');
console.log(_.isUndefined(void 0));
console.log(_.isUndefined(null));
Save the above program in
tester.js. Run the following command to execute this program.
Command
输出
