npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@dotglitch/ngx-lazy-loader

v0.0.31

Published

A hackable lazy loader for Angular components

Downloads

37

Readme

npm npm npm downloads GitHub stars

Quickstart

Install

$ npm install @dotglitch/ngx-lazy-loader

Import with App Module

import { NgModule } from '@angular/core';
import { NgxLazyLoaderModule } from '@dotglitch/ngx-lazy-loader';
import { ProgressDistractorComponent } from './@framework/progress-distractor/progress-distractor.component';
import { NotFoundComponent } from './@framework/not-found/not-found.component';
import { ErrorComponent } from './@framework/error/error.component';
import { Pages } from 'src/app/page.registry';
import { Dialogs } from 'src/app/dialog.registry';
import { Charts } from 'src/app/chart.registry';

@NgModule({
    declarations: [
        AppComponent,
    ],
    imports: [
        ...
        NgxLazyLoaderModule.forRoot({
            entries: [
                ...Pages,
                ...Dialogs,
                ...Charts
            ],
            loaderDistractorComponent: ProgressDistractorComponent,
            errorComponent: ErrorComponent,
            notFoundComponent: NotFoundComponent
        })
    ]
    bootstrap: [AppComponent]
})
export class AppModule {
}

Loading a Component

<ngx-lazy-loader
    component="TestChild"
    group="MyNonDefaultGroup"
    [inputs]="{
        prop1: value1,
        prop2: value2
    }"
    [outputs]="{
        buttonClicked: onChildButtonClicked.bind(this)
    }"
/>

As of release 0.0.17, outputs must be bound with .bind(this). We're working on improvements, but this is the most stable fix so far.

Configuration

NgxLazyLoaderModule.forRoot({
    /**
     * A list of lazy-loadable component registrations that we will
     * initialize with. This list can be added to during runtime.
     * Adding a component _after_ loading it via the lazy loader 
     * will not auto-resolve the component off of the notFoundComponent
     */
    entries: RegisteredComponents,
    /**
     * A component to show when the loader can't resolve a provided ID
     */
    notFoundComponent,
    /**
     * WIP: A component to show when something functionally fails when
     * bootstrapping a lazy-loadable component. 
     * > usually happens in the constructor 
     */
    errorComponent,
    /**
     * A component to show as a progress spinner / distractor
     */
    loaderDistractorComponent,
    /**
     * What strategy should be used to resolve components
     * @default ComponentResolveStrategy.FuzzyIdClassName
     */
    componentResolveStrategy: ComponentResolveStrategy,
    /**
     * When `componentResolveStrategy` is set to `Custom`,
     * the method that identifies which component to resolve to.
     */
    customResolver: (registry: (CompiledComponent | CompiledModule)[]) => Object
})

Component Grouping

If you use a lot of components all over the place, you may need to group lazy-loadable components in order to organize them and ensure that you don't encounter conflicts.

All you need to do when registering the component is add the group property:

component.registry.ts:

import { ComponentRegistration } from '@dotglitch/ngx-lazy-loader';

export const RegisteredComponents: ComponentRegistration[] = [
    // Components are added into the "default" group unless otherwise specified.
    { id: 'Landing', load: () => import('src/app/pages/general/landing/landing.component')},
    { id: 'About', load: () => import('src/app/pages/general/about/about.component')},

    { id: 'TermsOfUse', group: "dialog", load: () => import('src/app/pages/general/termsofuse/termsofuse.component') },
    { id: 'PrivacyPolicy', group: "dialog", load: () => import('src/app/pages/general/privacypolicy/privacypolicy.component') },

    { id: 'barchart', group: "chart", load: () => import('src/app/@charts/barchart/barchart.component')},
    { id: 'piechart', group: "chart", load: () => import('src/app/@charts/piechart/piechart.component')},
    { id: 'areachart', group: "chart", load: () => import('src/app/@charts/areachart/areachart.component')},
    { id: 'mapchart', group: "chart", load: () => import('src/app/@charts/mapchart/mapchart.component')},
    { id: 'histogram', group: "chart", load: () => import('src/app/@charts/histogram/histogram.component')},

    // You can overlap IDs as long as they have different groups
    { id: 'barchart', group: "dashboardtile", load: () => import('src/app/pages/dashboard/@tiles/barchart/barchart.component')},
    { id: 'piechart', group: "dashboardtile", load: () => import('src/app/pages/dashboard/@tiles/piechart/piechart.component')},
    { id: 'areachart', group: "dashboardtile", load: () => import('src/app/pages/dashboard/@tiles/areachart/areachart.component')},
    { id: 'mapchart', group: "dashboardtile", load: () => import('src/app/pages/dashboard/@tiles/mapchart/mapchart.component')},
    { id: 'histogram', group: "dashboardtile", load: () => import('src/app/pages/dashboard/@tiles/histogram/histogram.component')},
]

Then, you just need to add the group when you reference the component:

<ngx-lazy-loader
    component="TestChild"
    [inputs]="{
        prop1: value1,
        prop2: value2,
        prop5: 'asd',
        complex: complicated,
        myExternalKey: 'balloon',
        ...
    }"
    [outputs]="{
        prop3: onOutputFire,
        buttonClicked: onChildButtonClicked,
        ...
    }"
/>

Using ID Matchers

const registry: ComponentRegistration[] = [
    {
        group: "editor",
        matcher: [
            "fruit",
            "vegetables",
            "legumes"
        ],
        height: "750px",
        width: "1450px",
        load: () => import('src/app/pages/food-editor.component')
    },
    
    // This catches any value that doesn't exist on the previous matcher in the same group.
    // Order of these entries matters.
    {
        group: "editor",
        matcher: /.*/,
        height: "700px",
        width: "500px",
        load: () => import('src/app/pages/generic-editor.component')
    },
    ...


    {
        group: "dialogs",
        // Custom matchers can be provided, and will check against the original input
        matcher: (value: string) => value.contains("-dialog") && !value.contains("navigation"),
        height: "750px",
        width: "1450px",
        load: () => import('src/app/pages/@dialogs/confirmation.component')
    },
    // If using matchers and no match can be made, the standard NotFound component/template is loaded
]

This example contains additional properties on the registrations. When these are present, getting the matched component by running this.lazyLoader.resolveRegistrationEntry(name, opts.group || "default") from a DI injected instance of private lazyLoader: NgxLazyLoaderService will return the original entry. This can be used to additionally change parts of the UI as necessary.

Debugging

My Component doesn't load

  • Look for formatted console logs.

Component could not be resolved

  • Make sure the component is registered and the registry is imported in your app.module
  • Make sure the registration id is valid
  • Make sure the registration group is the same as in the HTML attribute <ngx-lazy-loader group="group1"/>
  • Check the registration matchers
  • Check the specified component selector

Matchers slugify the strings that they check