Encountering Error: Cannot find Property xxx on type xxx during Angular 6 Build

My project has an unusual issue where it builds and runs perfectly, but when attempting to build it on the SYS server, I encounter the following error:

ERROR in (html) Property 'ExampleDate' does not exist on type 'ExampleComponent'.

(I have disguised the actual property names for privacy). Eliminating this from my html/ts resolves the build issue, and all other form components function correctly.

My familiarity with this project spans a long time, and I have performed numerous check-ins and builds daily without any complications. Can you identify anything out of the ordinary?

.html

<form [formGroup]="myForm" class="my-form" novalidate>
    <div class="inline">
        <mat-form-field>
              <input matInput disabled [(value)]="someValue" [matDatepicker]="ExampleDate"
                     placeholder="Example Date" formControlName="ExampleDate">
        </mat-form-field>
    </div>

.ts

buildExampleForm() {
        this.myForm = this.form.group({
            ExampleDate: ['', ''],
            SomeOtherExampleDate: ['', ''],
        ...
angulartypescriptformgroups

Answer №1

Check out this sample code snippet of how to use MatDatePicker from the official Documentation

<mat-form-field appearance="fill">
  <mat-label>Different locale</mat-label>
  <input matInput [matDatepicker]="dp">
  <mat-datepicker-toggle matSuffix [for]="dp"></mat-datepicker-toggle>
  <mat-datepicker #dp></mat-datepicker>
</mat-form-field>

Make sure to include the line 

<mat-datepicker #matDatepicker></mat-datepicker>
in your html code

Here's an example you can follow:

 <form [formGroup]="myForm" class="my-form" novalidate>
    <div class="inline">
        <mat-form-field>
              <input matInput disabled [(value)]="someValue" [matDatepicker]="ExampleDate"
                     placeholder="Example Date" formControlName="ExampleDate">
              <mat-datepicker #ExampleDate></mat-datepicker>
        </mat-form-field>
    </div>

Answer №2

After scrolling through numerous posts, it became evident to me that the PRD build has a strict stance on template types that are not declared in the code behind. Interestingly, the easy fix of adding ExampleDate: any; resolved the issue for some individuals.

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