What is the method for importing the merge function from "lodash/merge" in TypeScript?

When using ES6, it's possible to import only a single function from a library in order to reduce the overall bundle size. For example:

import merge from "lodash/merge"

But in TypeScript, the statement above can trigger a compile error: Cannot find module "lodash/merge". So, what is the solution?

Answer №1

One approach is to utilize the 'lodash.merge' library to import a single function.

import merge from 'lodash.merge'

const result: any = merge(obj1, obj2)

However,

It is essential to include the property "esModuleInterop": true in the tsconfig.json file for it to function properly.

[cit] https://github.com/lodash/lodash/issues/3192#issuecomment-411963038

Answer №2

Latest Method

The updated approach is to utilize the separate packages. For instance, to use the merge function, you would need to install and implement lodash.merge as follows:

import merge from 'lodash.merge'

Note: Make sure to include

"esModuleInterop": true
in your tsconfig.json file to allow for the ES default import of merge.

Previous Solution

If encountering an error stating "Cannot find module "lodash/merge"," here's how to troubleshoot it:

It's worth noting that TypeScript definitions do not facilitate loading individual lodash members separately. Therefore, the recommended way is to

import * as _ from "lodash"
.

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