how to use the isnil function from the lodash library in typescript

To use the isNil function from the Lodash library in TypeScript, first, ensure that you have installed the Lodash library and have included it in your TypeScript file:

index.ts
import * as _ from 'lodash';
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You can then use the isNil function in your code:

index.ts
const exampleVariable: string | undefined = undefined;

if (_.isNil(exampleVariable)) {
  console.log('exampleVariable is undefined or null');
} else {
  console.log('exampleVariable has a value');
}
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The isNil function returns true if the value is null or undefined, and false otherwise.

Alternatively, you can import just the isNil function from Lodash:

index.ts
import isNil from 'lodash/isNil';

const exampleVariable: string | undefined = undefined;

if (isNil(exampleVariable)) {
  console.log('exampleVariable is undefined or null');
} else {
  console.log('exampleVariable has a value');
}
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