[Angular] Reactive Forms Multi-field Custom Validation

标签：make   inf   validator   spl   ror   custom   mic   active   display   

Let‘s say we have a date picker compoent which display start date and end date. We want to make sure that start date is no later than end date, if it was, display an error message.

Validators:

Return null means form is valid. Return object means form has error.

Usage:

[Angular] Reactive Forms Multi-field Custom Validation

标签：make   inf   validator   spl   ror   custom   mic   active   display   

原文地址：https://www.cnblogs.com/Answer1215/p/14459780.html