Lodash _.isUndefined() method is used to find whether the given value is undefined or not. It returns True if the given value is undefined. Otherwise, it returns false.
Syntax:
_.isUndefined(value);
Parameters:
- value: This parameter holds the value to check.
Return Value:
This method returns true if the value is undefined, else false.
Example 1: In this example, we are printing the boolean result of whether the given value is undefined or not by the use of the _.isUndefined() method.
Javascript
// The lodash library is included const _ = require("lodash");// Use of _.isUndefined() method console.log(_.isUndefined(null));console.log(_.isUndefined(void 0));console.log(_.isUndefined('gfg')); |
Output:
false
true
false
Example 2: In this example, we are printing the boolean result of whether the given value is undefined or not by the use of the _.isUndefined() method.
Javascript
// The lodash library is includedconst _ = require("lodash");// Use of _.isUndefined() method console.log(_.isUndefined(10));console.log(_.isUndefined(undefined)); |
Output:
false
true
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