Calculate  Age using JavaScript in D365

To get Age Value Using JavaScript prerequisites are :

1. Create A Date Column (Field) in Table(Entity) and name it "Date of Birth" or "DOB"

     Copy the Schema Name : Ex: new_dob ;

2. Create An  Age Column(Field) in Table (Entity) and name it "Age"

       Copy the Schema Name : Ex: new_age ;

3. Write A JavaScript Code in any Editor as below or directly in WebResource

function  getAge(executionContext)

{

debugger  // Used for debugging Errors

var formContext = executionContext.getFormContext(); 

var dob = formContext.getAttribute("new_dob").getValue();                  //Getting value from dob field

var today = new Date();                                // getting current date value and storing in "today" variable

var birthdate = new Date(dob)    // passing dob variable into  new Date  and storing in birthdate variable

var age = today.getFullYear()-birthdate.getFullYear(); //getting Full Year Values from today & Birthdate

formContext.getAttribute("new_age").setValue(age);         // Setting value to Age Field

}

4. Create A  WebResource Library and Paste Code over there Save and Publish all Customizations

5. Trigger an onChange Event on "Date of Brith " Column(field) 

6. Pass the Function Name  getAge and Check  box on Passing execution context at  First Parameter, Click Done 

7. Here we go  Code starts working in your Application

For  more Clarifications and Help ping me in  Gmail: samsonkongala1@gmail.com