Lodash _.runInContext() Method

Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.

The _.runInContext() method is used to create a new lodash function using the given context object.

Syntax:

_.runInContext( context )

Parameters: This method accepts a single parameter as mentioned above and described below:

• context: It holds the context object with which the new function has to be created.

Return Value: This method returns a new lodash function.

Example 1:

javascript

// Requiring the lodash library
const _ = require("lodash");

// Creating an object variable
_.mixin({ 'foo': _.constant('foo') });

var func = _.runInContext();
func.mixin({ 'bar': func.constant('bar') });

// Using the value() method
let val = _.isFunction(_.foo);

// Display the output
console.log(val);

Output:

true

Example 2:

javascript

// Requiring the lodash library
const _ = require("lodash");

// Creating an object variable
_.mixin({ 'foo': _.constant('foo') });

var func = _.runInContext();
func.mixin({ 'bar': func.constant('bar') });

// Using the value() method
let val = _.isFunction(_.bar);

// Display the output
console.log(val);

Output:

false

Example 3:

javascript

// Requiring the lodash library
const _ = require("lodash");

// Creating an object variable
_.mixin({ 'foo': _.constant('foo') });

var func = _.runInContext();
func.mixin({ 'bar': func.constant('bar') });

// Using the value() method
let val = func.isFunction(func.foo);

// Display the output
console.log(val);

Output:

false

Example 4:

javascript

// Requiring the lodash library
const _ = require("lodash");

// Creating an object variable
_.mixin({ 'foo': _.constant('foo') });

var func = _.runInContext();
func.mixin({ 'bar': func.constant('bar') });

// Using the value() method
let val = func.isFunction(func.bar);

// Display the output
console.log(val);

Output:

true