Lodash _.runInContext() method is used to create a new lodash function using the given context object.
Syntax:
_.runInContext( context );Parameters:
- 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: In this example, we are getting foo and bar functions by the use of the _.runInContext() method.
// Requiring the lodash library
const _ = require("lodash");
// Creating an object variable
_.mixin({ 'foo': _.constant('foo') });
let func = _.runInContext();
func.mixin({ 'bar': func.constant('bar') });
// Check if 'foo' and 'bar' are Lodash functions
let fooFun = _.isFunction(_.foo);
let barFunc = _.isFunction(func.bar);
// Display the output
console.log(fooFun);
console.log(barFunc);
Output:
true
true
Example 2: In this example, we are getting a bar functions by the use of the _.runInContext() method.
// Requiring the lodash library
const _ = require("lodash");
// Creating an object variable
_.mixin({ 'foo': _.constant('foo') });
let func = _.runInContext();
func.mixin({ 'bar': func.constant('bar') });
// Check if 'bar' is a function
// in the custom Lodash context
let val = func.isFunction(func.bar);
// Display the output
console.log(val); // Outputs: true
Output:
true