How to change Angular 5 Material input placeholder? [duplicate]

Answer 1

What options we have?

1. tag is deprecated: https://material.angular.io/components/form-field/api#MatPlaceholder

2. /deep/ selector will be deprecated soon. ::placeholder selector is still experimental feature: https://developer.mozilla.org/en-US/docs/Web/CSS/::placeholder

So I would recommend to use input placeholder as an attribute only if your clients have modern browsers.