LodashGS

Lodash for Google Apps Script is a library that enables the use of the lodash.js library in Google Apps Script. API docs are available here.

Adding the library to your project

Lodash for Google Apps Script is made available as a script library. This is how you add it to your project:

Select "Resources" > "Libraries..." in the Google Apps Script editor.
Enter the project key (1SQ0PlSMwndIuOAgtVJdjxsuXueECtY9OGejVDS37ckSVbMll73EXf2PW) in the "Find a Library" field, and choose "Select". (If you have copied the library, enter instead the project key of your copy.)
Select the highest version number, and choose Lodash as the identifier. (Do not turn on Development Mode unless you know what you are doing. The development version may not work.)
Press Save. You can now use the Lodash library in your code.

You can find the current build for the Apps Script platform in the build folder.

The 6 version (full description v1.0.2-1 (4.17.21)) of the LodashGS corresponds to the 4.17.21 version of the Lodash.

To load LodashGS:

var _ = LodashGS.load();

Same for v8:

const _ = LodashGS.load();

A Google Apps Script project for Lodash is available here.

To copy the library, Select "File" > "Make a copy..." in the Google Apps Script editor.

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Lodash for Google Apps Script is released under the MIT license.