An IIFE (Immediately Invoked Function Expression) is a JavaScript function that runs as soon as it is defined. … It is a design pattern which is also known as a Self-Executing Anonymous Function and contains two major parts: The first is the anonymous function with lexical scope enclosed within the Grouping Operator () .

What is an immediately invoked function in JavaScript with example?

An IIFE (Immediately Invoked Function Expression) is a JavaScript function that runs as soon as it is defined. … It is a design pattern which is also known as a Self-Executing Anonymous Function and contains two major parts: The first is the anonymous function with lexical scope enclosed within the Grouping Operator () .

What is invoked in JavaScript?

JavaScript Function Invocation is used to executes the function code and it is common to use the term “call a function” instead of “invoke a function”. The code inside a function is executed when the function is invoked.