Angular 2 flash messages module

This is a simple module that provides component and service for showing flash messages.

Requirements

• NPM - Node package manager

Installation

• run npm install angular2-flash-messages --save
• import FlashMessagesModule in your app's main module app.module.ts, e.g.:

// other imports
// ...
import { FlashMessagesModule } from 'angular2-flash-messages';
// ...

@NgModule({
    imports: [
        // other imports
        // ...
        FlashMessagesModule,
        // ...
    ]
})

That should be enough if you use Webpack to bundle JavaScript.

Otherwise you'll have to edit systemjs.config.js to set correct path, e.g.:

// below you can see an example of map and packages sections in systemjs.config.js

// ...
// map tells the System loader where to look for things
var map = {
    // ...
    'angular2-flash-messages':    'node_modules/angular2-flash-messages'
    // ...
};
// packages tells the System loader how to load when no filename and/or no extension
var packages = {
    // ...
    'angular2-flash-messages':    { main: 'index.js', defaultExtension: 'js' }
    // ...
};

// ...

Usage

Place flash messages component selector in a template, for example in AppComponent:

import { Component } from "@angular/core";

@Component({
    selector: 'my-app',
    template: `
        <flash-messages></flash-messages>
        <router-outlet></router-outlet>
    `
})
export class AppComponent {}

Import FlashMessagesService and show flash message in any component, e.g.:

import { Component, OnInit } from '@angular/core';
import { FlashMessagesService } from 'angular2-flash-messages';

@Component({
    template: `
        <p>About Component</p>
    `
})
export class AboutComponent implements OnInit {
    constructor(private _flashMessagesService: FlashMessagesService) {}
    
    ngOnInit() {
        // 1st parameter is a flash message text
        // 2nd parameter is optional. You can pass object with options.
        this._flashMessagesService.show('We are in about component!', { cssClass: 'alert-success', timeout: 1000 });
    }
}

By default flash message is visible for 2.5 seconds and then deleted. You can pass second argument and specify for how long flash message should be visible, e.g.:

// flash message will be visible for 1 second
this._flashMessagesService.show('We are in about component!', { timeout: 1000 });

You can specify CSS class for flash message div-element, e.g.:

// set CSS-class for wrapper div of flash message
this._flashMessagesService.show('We are in about component!', { cssClass: 'your-css-class' });

You can show multiple flash messages, e.g.:

this._flashMessagesService.show('Success!', { cssClass: 'alert-success' } );
this._flashMessagesService.show('Failure!', { cssClass: 'alert-danger' } );

Also you can gray out everything except your flash messages, e.g.:

this._flashMessagesService.grayOut(true); // turn on gray out feature
this._flashMessagesService.grayOut(false); // turn off gray out feature

By default gray out is disabled.

Notice! You have to add some CSS to see gray out in action, e.g.:

#grayOutDiv
{
    background-color: #333;
    opacity: 0.7;
    position: fixed;
    top: 0px;
    left: 0px;
    height: 100%;
    width: 100%;
    overflow: hidden;
    z-index: 9999;
}

.flash-message 
{
    z-index: 10000;
    position: relative;
}

Feedback

Please leave your feedback if you have noticed any issues or have a feature request.

License

The repository code is open-sourced software licensed under the MIT license.