What reduce(function) will do in component.find() in Salesforce Lightning?

Hello Anjali,

Reduce() - The reduce() method applies a function against an accumulator and each element in the array (from left to right) to reduce it to a single value.

In your code , it takes a function as input and applies that on the component.find(‘contactField’) and returns the output.

Thanks.

Hi,

reduce() is javaScript array method,  actually this is the syntax of this method :

syntax : array.reduce(function(total, currentValue, currentIndex, arr), initialValue)

In your scenario it will return field value from given field in InpCmp.

How to use in Lightnign coe snippet:

// If there are more than 1 fields
if(contactFields.length!=undefined) {
// Iterating all the fields
var allValid = contactFields.reduce(function (validSoFar, inputCmp) {
// Show help message if single field is invalid
inputCmp.showHelpMessageIfInvalid();
// return whether all fields are valid or not
return validSoFar && inputCmp.get('v.validity').valid;
}, true);

Thanks