Disable button while input is not valid Angular

angular form validation
disable button until form is valid

I'd like to make certain input-fields only available for integer or decimal-values. So I got the following code:

<input type="text" pattern="[0-9]*" [(ngModel)]="myValue" pInputText class="medium-field"
    (change)="calculate()"/>

So this field is marked if the pattern does not match the input. Still I would like to disable the submit-button while the pattern is not matched. Can I somehow access that value as a boolean or is there another way?

If you don't want to use Reactive Forms, you can do:

<input type="text" pattern="[0-9]*" [(ngModel)]="myValue" #myInput />
<button [disabled]="!myInput.validity.valid">Submit</button>

That will disable your submit button if the HTML validity of your input is invalid.

Here is a working example.

I would also suggest you use type="number" in your input.

Enable/disable buttons with Angular, How do I turn off input fields in reactive form? How can I disable the button if the input is empty, and enable it when the user start typing in the input, i tried that: <input #new_field type="text" autocomplete="off" /> <p-button (onClick)="saveNewField(new_field.value)" [disabled]="new_field.value ==''" label="Save"></p-button> and also this:

The form will be marked automatically as invalid if your input didn't matched with your pattern.

You can just use:

<form novalidate
      #form="ngForm">

     /* Your inputs */

     <button type="button"
             [disabled]="form.invalid">     // form as per the referenced #form="ngForm"
                                            // Disables if your inputs are invalid or doesn't meet with its pattern
         Submit
     </button>

Valid and Invalid in Angular Forms, ] attribute, if it the currentLesson is not the same as it's order. AngularJS Validation Button Form. Here Mudassar Ahmed Khan has explained with an example, how to disable Submit Button when INPUT Text Field (TextBox) is empty in AngularJS. When using AngularJS Form validation, the $invalid property can be used to disable the Submit Button when Form is not filled (empty) i.e. the INPUT Text Fields (TextBoxes) have invalid data.

try form validation for it.using *ngIf and

<button type="submit" [disabled]="form.invalid">SEND</button>

Disable button if formgroup is invalid, In Angular one of most common ways to validate forms is to disable the submit button. <button type="submit" [disabled]="form.invalid">SEND</button> To demonstrate this we will create a simple form with one input that We also have a div to display a simple loading spinner while we will check the  Im building a form using Angular 5.1.1 /Typescript 2.4.2 + Material 5 with sat-popover library Trying to disable submit button while input is invalid without success. am using the Material Input

AngularJS: Disable Submit Button when INPUT Text Field (TextBox , Second (optional), we disable the form button if the form is invalid. How to Create Your First Angular Reactive Form Using FormGroup class. When i filled the first input field, the button become enabled (while the other input fields are still  Because in a pending state valid becomes false the button will be disabled until we get result and depending on that result we either enable the button or not. So hopefully now it’s clear why using [disabled]=”!form.valid” is more secure than [disabled]=”form.invalid”. Thanks for reading. The full code is available here

Angular, When using AngularJS Form validation, the $invalid property can be Disabling Submit Button when INPUT Text Field (TextBox) is empty in AngularJS Required validation for the TextBox is failing while the second HTML  Disable submit button until all mandatory fields are filled - Angular Let us check how we can disable submit button of a form until all mandatory fields are filled. Angular folks made these things very simple, before explaining those you can check this link to know how it was in Angular js 1.

ngDisabled, Why write a blog post about disabling a form, you think? Angular — Disable a Form while Preserving Form Control State but the examples should be applicable on template-driven forms as well. The solution proposed in the post does currently not 100% cover <button type=”submit”>Submit</button> Problem is that the boolean member valid has to be true or false. Sure. But it will be false.Same goes for invalid. So if you want to be able to consider disabled input you have to check if the input is disabled before checking its control, it seems a bit strange to me that you have to check if the input is enabled before checking its control,

Comments
  • Easiest way is probably to use Reactive Forms in Angular; but explaining what those are is probably beyond the scope of answering a question. An alternate way would be to trigger a buttonDisabled flag in your calculate function that controls whether your button is disabled or not.