如何在 angular 2 中禁用 div 标签

Question

I am trying to disable the div tag after a success callback of that action.

please look my ion-content

<ion-content padding class="forgot-password">
  <div [ngClass]="{active: isOn,disabled: isDisabled}">
    <ion-item>
        <ion-label floating>Email/Mobile</ion-label>
        <ion-input type="text" [(ngModel)]="loginId"></ion-input>
    </ion-item> <br><br>

    <button class="float-right" (click)="generateOTP(!isOn);">Send OTP</button><br><br><br>
  </div>
  <br>

  <div *ngIf="showRePasswd">
    <ion-item>
        <ion-label floating>Enter OTP</ion-label>
        <ion-input type="text" [(ngModel)]="passwd"></ion-input>
    </ion-item> <br><br>

    <button class="float-right" (click)="resetPassword();">Send Password</button>
  </div>
</ion-content>

here is my.ts file

export class ForgotPasswordPage {

    public loginId = "";
    public passwd = "";

  public showRePasswd = false;
  isDisabled = false;
  isOn = false;

  constructor(private navCtrl: NavController, private logger: Logger, private user: Users) {

  }

  generateOTP(newstate) {
    this.logger.info("invoking generateOTP FN");
    var _this = this;
    this.user.generateOTP(this.loginId, function(result,data){
      if(result == '1') {
        alert(data);
        _this.showRePasswd = !_this.showRePasswd;
        _this.isDisabled = true;
        _this.isOn = newstate;
      }
      else {
        //this.showRePasswd = this.showRePasswd;
        alert(data);
      }
    })
  }

  resetPassword() {
    this.logger.info("invoking resetPassword FN");
    var _this = this;

    this.user.resetPassword(this.passwd, function(result,data) {
      if(result == '1') {
        alert(data);
        _this.navCtrl.push(LoginPage);
      }
      else {
        alert(data);
      }
    })
  }
}

I tried [ngClass] but i am not able to make my div tag disable after the success callback.

I also tried using [disabled] but not working

Here is a demo for disable a div tag but in my case not working

My requirement is to make my input field and button to be disabled after success callback

Answer 1

You can add the attribute like

<div [attr.disabled]="isDisabled ? true : null">

but <div> doesn't support the disabled attribute.

Perhaps this is what you want

<div (click)="isDisabled ? $event.stopPropagation() : myClickHandler($event); isDisabled ? false : null"
   [class.isDisabled]="isDisabled"></div>

with some custom CSS that makes .isDiabled look disabled.

It might be better to create a method to put the code there instead of inline.

Answer 2

You can use CSS property pointer-events: none; in your tag div:

<ion-content padding class="forgot-password">
  <div style="pointer-events: none;">
   ...
  </div>
</ion-content>

Answer 3

This is used in my Angular 8 project: First set to HTML file like below. Set to Div tag ngClass=>

<div class="col-md-3" [ngClass]="{disabledNoOfCasesDiv: !isActiveNOofCasesNo}>
<label class="control-label mb-2">No. of Cases Receive</label>
<input type="number" class="form-control" [(ngModel)]="CollectJob.NoOfCases"
placeholder="No. Cases Receive" name="NoCasesReceive">
</div>

Then next step write CSS for disabling events:

.disabledNoOfCasesDiv{ pointer-events: none; opacity: 2.0;}

Then last:

declare the variable and set to boolean

 isActiveNOofCasesNo: boolean;

Then next just pass true/false values wherever you want to enable div tag or disable div tag, div will automatically enabled or disabled.

this.isActiveNOofCasesNo = true;
this.isActiveNOofCasesNo = false;

Thank You..... Happy Learning!...:) angular html css ionic typescript

Answer 4

You Can easily enable/disable the DOM elements using the Angular Directives :-

Create a Simple Directive - DisableDirective

import { AfterViewInit, Directive, ElementRef, Input, OnChanges, Renderer2 } from '@angular/core';

const DISABLED = 'disabled';
const APP_DISABLED = 'app-disabled';
const TAB_INDEX = 'tabindex';
const TAG_ANCHOR = 'a';

@Directive({
  selector: '[appDisable]'
})
export class DisableDirective implements OnChanges, AfterViewInit {

  @Input() appDisable = true;

  constructor(private eleRef: ElementRef, private renderer: Renderer2) { }

  ngOnChanges() {
    this.disableElement(this.eleRef.nativeElement);
  }

  ngAfterViewInit() {
    this.disableElement(this.eleRef.nativeElement);
  }

  private disableElement(element: any) {
    if (this.appDisable) {
      if (!element.hasAttribute(DISABLED)) {
        this.renderer.setAttribute(element, APP_DISABLED, '');
        this.renderer.setAttribute(element, DISABLED, 'true');

        // disabling anchor tab keyboard event
        if (element.tagName.toLowerCase() === TAG_ANCHOR) {
          this.renderer.setAttribute(element, TAB_INDEX, '-1');
        }
      }
    } else {
      if (element.hasAttribute(APP_DISABLED)) {
        if (element.getAttribute('disabled') !== '') {
          element.removeAttribute(DISABLED);
        }
        element.removeAttribute(APP_DISABLED);
        if (element.tagName.toLowerCase() === TAG_ANCHOR) {
          element.removeAttribute(TAB_INDEX);
        }
      }
    }
    if (element.children) {
      for (let ele of element.children) {
        this.disableElement(ele);
      }
    }
  }
}

Now Use this directive with your component div :-

<div [appDisable]="true">
</div>

Note - Not to forget register Directive in your AppModule.

Please Refer the POST for the detailed discription.

Answer 5

in html

<div[appViewDisable]="disable_condition">

in.ts

disable_condition = True or False

True will disable the content init.

Answer 6

Div element cannot be disabled like form controls. You can disable form controls in div instead.

Provided example has custom class "disabled"

styles: [`
    .button {
      width: 120px;
      border: medium solid black;
    }

    .active {
      background-color: red;
    }

    .disabled {
      color: gray;
      border: medium solid gray;
    }
  `] 

Answer 7

HTML file

div [ngClass]="condition"

ts file

this.condition = 'mydisable';

css file

.mydisable {
  pointer-events: none;
}