@angular/material/typings/form-field/hint.d.ts

Angular Material

/** Hint text to be shown underneath the form field control. */
export declare class MdHint {
    /** Whether to align the hint label at the start or end of the line. */
    align: 'start' | 'end';
    /** Unique ID for the hint. Used for the aria-describedby on the form field control. */
    id: string;
}