What is findindex in javascript?

 Array findindex method javascript:

 

findIndex() method returns first value index position When satisfied condition true from the given function as callback. If not find give value then the position will be return -1.

Also, you can read about LastIndexOf().

Syntax of findIndex method:

array.findIndex(function)

 

findindex example in javascript:

 

const colors = ["Red", "blue", "Black", "Red", "Orange", "White"];

 

const getColor = colors.findIndex(element => element == "White");

console.log(getColor);

// 5

 

const getColorNot = colors.findIndex(element => element == "Green");

console.log(getColorNot);

// -1