Detecting an undefined/null object property in an aplication vue.
I can not resolve this object problem not defined.
I am using a vue application with esLint. But I believe this is only solved with javascript.
Thank you guys.
var Data = (typeof data.method.expiration_date !== 'undefined') ? date.formatDate(String(data.method.expiration_date), 'DD/MM/YYYY') : ''
Error:
Uncaught (in promise) TypeError: Cannot read property 'expiration_date' of null
Simply you don't have expiration_date in method.data so first check if it exists then do your stuff.
var Data = (data.method && data.method.expiration_date) ? date.formatDate(String(data.method.expiration_date), 'DD/MM/YYYY') : '';
You need to add check before accessing properties of object, here i am using && operator ( short circuiting method ) to check existence of value before accessing it
var exp_data = data && data.methoda && data.method.expiration_date
var Data = (typeof exp_data !== undefined && typeof exp_data !== undefined ) ? date.formatDate(String(exp_data), 'DD/MM/YYYY') : ''
In you you need to test for any false value then you can simply use this
var exp_data = data && data.methoda && data.method.expiration_date
var Data = exp_data ? date.formatDate(String(exp_data), 'DD/MM/YYYY') : ''
You can use:
var Data = (data.method && data.method.expiration_date) ? date.formatDate(String(data.method.expiration_date), 'DD/MM/YYYY') : ''
Checks for existence of data.method and before referencing data.method.expiration_date.
