When working with formControlName in Angular Material 2, the placeholder may overlap the entered value

After updating my application with angular-cli to angular/material (2.0.0-beta.11) and angular (4.4.4), I noticed that every placeholder in the material input fields overlaps the value when provided with formControlName in reactive forms. However, when using the value attribute directly, the placeholder works correctly.

Here is the code for my form:

<form novalidate (ngSubmit)="save(formGroup)" [formGroup]="formGroup">
   <md-form-field>
      <input mdInput placeholder="Favorite food" formControlName="placeName">
   </md-form-field>

   <!-- This entry is for test sake -->
   <md-form-field>
      <input mdInput placeholder="Favorite food" value="TEST VALUE">
   </md-form-field>
</form>

Here is a screenshot of the issue: https://i.sstatic.net/PY2RA.png

Interestingly, on the server where I still use angular 4.1.2, the form is rendered correctly. I have checked the documentation and release notes but could not find any information on this issue. Does anyone know a possible solution to this problem other than downgrading the packages?

Answer №1

For the past few days, I've been dealing with this frustrating issue. To work around it, I came up with a solution involving triggering a click event. This method assumes that clicking on an input will move the placeholder up.

Here's how you can implement it in your code:

<mat-form-field>
  <input matInput #inputField placeholder="My Input" formControlName="placeName">          
</mat-form-field>

To make this workaround function properly, include the following TypeScript code:

 @ViewChild('inputField') inputField: ElementRef;

    ngAfterViewInit() {
      setTimeout(x => this.triggerClickEvent(), 50);
    }

    triggerClickEvent() {
      let elem: HTMLElement;
      elem = this.inputField.nativeElement as HTMLElement;
      elem.click();
      elem.blur(); 
    }

The "blur" method is utilized to remove focus after the interaction, but you can omit this if you want to retain the focus. Hopefully, this explanation proves helpful to someone facing a similar issue. The versions of Angular and angular/material used here are:

angular/material = 2.0.0-beta.12
angular 4 = 4.2.4

Answer №2

To manipulate the display of your label, utilize the floatField attribute. For example, to hide the Label while typing, you can implement the following:

<md-form-field floatLabel="never">
       <input mdInput placeholder="Favorite food" formControlName="placeName">
 </md-form-field floatLabel="never">

Answer №3

After updating the material to version 2.0.0-beta.12, I replaced all instances of "md" with "mat" prefixes which resolved the problem. It appears that there were conflicts caused by using outdated "md" components instead of the new "mat" components.

(October 15, 2017 - From my response here as a solution to resolve the question)

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