Angular2 Stateful Button

Demo

An implementation of stateful buttons for angular2+ including loading, progress,success and failure state.

Installation

yarn add ng2-stateful-button 

or

npm install ng2-stateful-button --save

Setup

// app.module.ts
import {NgModule} from '@angular/core';
import {BrowserModule} from '@angular/platform-browser';
import {StatefulButtonModule} from 'ng2-stateful-button'; // <-- import the module
import {MyComponent} from './my.component';

@NgModule({
    imports: [BrowserModule, StatefulButtonModule], // <-- include it in your app module
    declarations: [MyComponent],
    bootstrap: [MyComponent]
})
export class MyAppModule {}

Usage

Behaviour

ng2-stateful-button provides one component stateful-button that you can use to wrap a button:

<stateful-button [buttonState]="myButtonState">
  <button (click)="do()">
    <sb-label-idle>Save</sb-label-idle>
    <sb-label-doing>Saving</sb-label-doing>
    <sb-label-success>Saved</sb-label-success>
    <sb-label-failure>Save failed!</sb-label-failure>
  </button>
</stateful-button>

The stateful-button component takes one input buttonState, which is the state of your button.

You can still set the attributes (disabled, click, type etc.) you want, just like you would do with a normal button. We use the standard ng-content to project the content and provide basic functionnality of state handling and a nice state declaration.

There are four states which are defined in an enum ButtonState. Your component controls the state of the button.

import { ButtonState } from 'ng2-stateful-button';

@Component(…)
export class MyComponent {
  …
  myButtonState: ButtonState = ButtonState.IDLE;
  …

  do() {
    this.myButtonState = ButtonState.DOING;
    // http requests, timeout, etc.
    this.myButtonState = ButtonState.SUCCESS;
  }
}

Use the sb-label-idle/doing/failure/success components to define what will be shown for each state of the button. That's it!

IMPORTANT: put the sb-label-XY into the <button>.

Style

ng2-stateful-button comes with inline component styles. They are completely customizable. Each state (IDLE, DOING, SUCCESS, FAILURE) is represented as a CSS class on the stateful-button element. No magic here. You can customize the sb-label-XY as well. For your information, the generated HTML looks like:

<stateful-button class="stateful-button stateful-button--doing">
  <button>
    <sb-label-idle>Save</sb-label-idle>
    <sb-label-doing>Saving</sb-label-doing>
    <sb-label-success>Saved</sb-label-success>
    <sb-label-failure>Save failed!</sb-label-failure>
  </button>
</stateful-button>

As an exemple, you could do the following (in SASS/LESS):

stateful-button {
  &.stateful-button--doing button {
    background-color: grey;
    color: white;
    box-shadow: none;
    cursor: wait;
  }

  &.stateful-button--success button {
    background-color: #2ECC40;
    color: white;
    box-shadow: none;
    cursor: default;
  }

  &.stateful-button--failure button {
    background-color: #FF4136;
    color: white;
    box-shadow: none;
    cursor: default;
  }
}

The default CSS properties of sb-label-XY are:

height: 30px;
line-height: 30px;
margin-top: -30px;
text-align: center;
display: block;

and the sb-label-idle has a special:

margin-top: 0;

This CSS magic makes sure that the button takes the maximum width of all the states! sb-label-XYs are hidden with opacity: 0.

Develop

Link your development folder of ng2-stateful-button:

yarn link

and then go to a project you want to use the stateful buttons in and do

yarn link "ng2-stateful-button"

to use it there.

License

MIT