javascript-lodashHow can I check for undefined values in JavaScript using Lodash?
The Lodash library provides a convenient way to check for undefined values in JavaScript. To do this, you can use the _.isUndefined()
method. This method takes a single argument, which is the value to be checked, and returns a boolean value indicating whether the value is undefined.
For example:
const myValue = undefined;
const isUndefined = _.isUndefined(myValue);
console.log(isUndefined); // true
Output example
true
The code above uses the _.isUndefined()
method to check the value of the myValue
variable. Since the variable is set to undefined
, the method returns true
, indicating that the value is indeed undefined.
The _.isUndefined()
method is a useful tool for checking whether a given value is undefined. It is particularly useful when dealing with variables that may be set to undefined
in certain conditions.
Code explanation
const myValue = undefined;
- This line declares a variable calledmyValue
and sets it toundefined
.const isUndefined = _.isUndefined(myValue);
- This line uses the_.isUndefined()
method to check the value of themyValue
variable.console.log(isUndefined);
- This line prints the result of the_.isUndefined()
method to the console.
Helpful links
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