Helena Páez Hijo

Helena Páez Hijo

1620202972

How we use Web Components at GitHub

GitHub has long been a proponent of Web Components. Here’s how we use them.

At GitHub, we pride ourselves on delivering a first-class developer experience. A considerable part of our work is on our front end, which we strive to keep as lightweight, fast, and accessible as possible. For a product as large as GitHub, this can be quite the task. Like many front-end codebases, we leverage components, independent, isolated, and reusable pieces of code that allow application teams to deliver high fidelity UI quickly and efficiently while still keeping to our high standards of quality.

We’re using Web Components in a big way at GitHub. We have over a dozen open-source Web Components and with dozens more that are closed source.

How we got here

When GitHub launched over a decade ago, we had a modest front-end codebase that mostly used jQuery. Ten years and nearly 85,000 lines of code later, we had a large front-end codebase that was starting to show growing pains. We ultimately transitioned away from jQuery (for reasons which we detailed in a blog post at the time) and started using new technologies which could better solve our problems.

We began to dabble with a new technology called Web Components, a set of native browser technologies that allow the development of customized HTML elements, progressively enhanced with JavaScript.

We chose to use Web Components because our codebase was already structured into component-like behaviors. Still, as the GitHub monolith grew in size, we saw the need to implement better encapsulations before the front-end became unmanageable – and Web Components fit the bill. Web Components offered better portability and encapsulation than our existing JavaScript behaviors. We were happy to experiment with Web Components alongside our existing front-end infrastructure since it doesn’t incur any upfront cost or “buy-in” to a specific framework.

Our first two custom elements shipped in 2014: elative-time and local-time, which show times and dates in friendly formats, and include-fragment, which allows us to lazy load HTML fragments. Slowly we realized just how powerful these elements could be and began replacing design patterns within the codebase wholesale, such as replacing our “facebox” modal dialog pattern with details-dialog. Our components now range from very generic, multi-purpose behaviors like remote-input to specific single-purpose components such as the markdown-toolbar element and its siblings.

For the power Web Components affords, there are still pain points and pitfalls. With such a large codebase owned by hundreds of engineers across dozens of teams, we need to provide as much support and tooling as possible, encoding best practices without manual code review becoming a bottleneck.

#github #web-components #web-development #programming #developer

What is GEEK

Buddha Community

How we use Web Components at GitHub
Chloe Butler

Chloe Butler

1667425440

Pdf2gerb: Perl Script Converts PDF Files to Gerber format

pdf2gerb

Perl script converts PDF files to Gerber format

Pdf2Gerb generates Gerber 274X photoplotting and Excellon drill files from PDFs of a PCB. Up to three PDFs are used: the top copper layer, the bottom copper layer (for 2-sided PCBs), and an optional silk screen layer. The PDFs can be created directly from any PDF drawing software, or a PDF print driver can be used to capture the Print output if the drawing software does not directly support output to PDF.

The general workflow is as follows:

  1. Design the PCB using your favorite CAD or drawing software.
  2. Print the top and bottom copper and top silk screen layers to a PDF file.
  3. Run Pdf2Gerb on the PDFs to create Gerber and Excellon files.
  4. Use a Gerber viewer to double-check the output against the original PCB design.
  5. Make adjustments as needed.
  6. Submit the files to a PCB manufacturer.

Please note that Pdf2Gerb does NOT perform DRC (Design Rule Checks), as these will vary according to individual PCB manufacturer conventions and capabilities. Also note that Pdf2Gerb is not perfect, so the output files must always be checked before submitting them. As of version 1.6, Pdf2Gerb supports most PCB elements, such as round and square pads, round holes, traces, SMD pads, ground planes, no-fill areas, and panelization. However, because it interprets the graphical output of a Print function, there are limitations in what it can recognize (or there may be bugs).

See docs/Pdf2Gerb.pdf for install/setup, config, usage, and other info.

pdf2gerb_cfg.pm

#Pdf2Gerb config settings:
#Put this file in same folder/directory as pdf2gerb.pl itself (global settings),
#or copy to another folder/directory with PDFs if you want PCB-specific settings.
#There is only one user of this file, so we don't need a custom package or namespace.
#NOTE: all constants defined in here will be added to main namespace.
#package pdf2gerb_cfg;

use strict; #trap undef vars (easier debug)
use warnings; #other useful info (easier debug)


##############################################################################################
#configurable settings:
#change values here instead of in main pfg2gerb.pl file

use constant WANT_COLORS => ($^O !~ m/Win/); #ANSI colors no worky on Windows? this must be set < first DebugPrint() call

#just a little warning; set realistic expectations:
#DebugPrint("${\(CYAN)}Pdf2Gerb.pl ${\(VERSION)}, $^O O/S\n${\(YELLOW)}${\(BOLD)}${\(ITALIC)}This is EXPERIMENTAL software.  \nGerber files MAY CONTAIN ERRORS.  Please CHECK them before fabrication!${\(RESET)}", 0); #if WANT_DEBUG

use constant METRIC => FALSE; #set to TRUE for metric units (only affect final numbers in output files, not internal arithmetic)
use constant APERTURE_LIMIT => 0; #34; #max #apertures to use; generate warnings if too many apertures are used (0 to not check)
use constant DRILL_FMT => '2.4'; #'2.3'; #'2.4' is the default for PCB fab; change to '2.3' for CNC

use constant WANT_DEBUG => 0; #10; #level of debug wanted; higher == more, lower == less, 0 == none
use constant GERBER_DEBUG => 0; #level of debug to include in Gerber file; DON'T USE FOR FABRICATION
use constant WANT_STREAMS => FALSE; #TRUE; #save decompressed streams to files (for debug)
use constant WANT_ALLINPUT => FALSE; #TRUE; #save entire input stream (for debug ONLY)

#DebugPrint(sprintf("${\(CYAN)}DEBUG: stdout %d, gerber %d, want streams? %d, all input? %d, O/S: $^O, Perl: $]${\(RESET)}\n", WANT_DEBUG, GERBER_DEBUG, WANT_STREAMS, WANT_ALLINPUT), 1);
#DebugPrint(sprintf("max int = %d, min int = %d\n", MAXINT, MININT), 1); 

#define standard trace and pad sizes to reduce scaling or PDF rendering errors:
#This avoids weird aperture settings and replaces them with more standardized values.
#(I'm not sure how photoplotters handle strange sizes).
#Fewer choices here gives more accurate mapping in the final Gerber files.
#units are in inches
use constant TOOL_SIZES => #add more as desired
(
#round or square pads (> 0) and drills (< 0):
    .010, -.001,  #tiny pads for SMD; dummy drill size (too small for practical use, but needed so StandardTool will use this entry)
    .031, -.014,  #used for vias
    .041, -.020,  #smallest non-filled plated hole
    .051, -.025,
    .056, -.029,  #useful for IC pins
    .070, -.033,
    .075, -.040,  #heavier leads
#    .090, -.043,  #NOTE: 600 dpi is not high enough resolution to reliably distinguish between .043" and .046", so choose 1 of the 2 here
    .100, -.046,
    .115, -.052,
    .130, -.061,
    .140, -.067,
    .150, -.079,
    .175, -.088,
    .190, -.093,
    .200, -.100,
    .220, -.110,
    .160, -.125,  #useful for mounting holes
#some additional pad sizes without holes (repeat a previous hole size if you just want the pad size):
    .090, -.040,  #want a .090 pad option, but use dummy hole size
    .065, -.040, #.065 x .065 rect pad
    .035, -.040, #.035 x .065 rect pad
#traces:
    .001,  #too thin for real traces; use only for board outlines
    .006,  #minimum real trace width; mainly used for text
    .008,  #mainly used for mid-sized text, not traces
    .010,  #minimum recommended trace width for low-current signals
    .012,
    .015,  #moderate low-voltage current
    .020,  #heavier trace for power, ground (even if a lighter one is adequate)
    .025,
    .030,  #heavy-current traces; be careful with these ones!
    .040,
    .050,
    .060,
    .080,
    .100,
    .120,
);
#Areas larger than the values below will be filled with parallel lines:
#This cuts down on the number of aperture sizes used.
#Set to 0 to always use an aperture or drill, regardless of size.
use constant { MAX_APERTURE => max((TOOL_SIZES)) + .004, MAX_DRILL => -min((TOOL_SIZES)) + .004 }; #max aperture and drill sizes (plus a little tolerance)
#DebugPrint(sprintf("using %d standard tool sizes: %s, max aper %.3f, max drill %.3f\n", scalar((TOOL_SIZES)), join(", ", (TOOL_SIZES)), MAX_APERTURE, MAX_DRILL), 1);

#NOTE: Compare the PDF to the original CAD file to check the accuracy of the PDF rendering and parsing!
#for example, the CAD software I used generated the following circles for holes:
#CAD hole size:   parsed PDF diameter:      error:
#  .014                .016                +.002
#  .020                .02267              +.00267
#  .025                .026                +.001
#  .029                .03167              +.00267
#  .033                .036                +.003
#  .040                .04267              +.00267
#This was usually ~ .002" - .003" too big compared to the hole as displayed in the CAD software.
#To compensate for PDF rendering errors (either during CAD Print function or PDF parsing logic), adjust the values below as needed.
#units are pixels; for example, a value of 2.4 at 600 dpi = .0004 inch, 2 at 600 dpi = .0033"
use constant
{
    HOLE_ADJUST => -0.004 * 600, #-2.6, #holes seemed to be slightly oversized (by .002" - .004"), so shrink them a little
    RNDPAD_ADJUST => -0.003 * 600, #-2, #-2.4, #round pads seemed to be slightly oversized, so shrink them a little
    SQRPAD_ADJUST => +0.001 * 600, #+.5, #square pads are sometimes too small by .00067, so bump them up a little
    RECTPAD_ADJUST => 0, #(pixels) rectangular pads seem to be okay? (not tested much)
    TRACE_ADJUST => 0, #(pixels) traces seemed to be okay?
    REDUCE_TOLERANCE => .001, #(inches) allow this much variation when reducing circles and rects
};

#Also, my CAD's Print function or the PDF print driver I used was a little off for circles, so define some additional adjustment values here:
#Values are added to X/Y coordinates; units are pixels; for example, a value of 1 at 600 dpi would be ~= .002 inch
use constant
{
    CIRCLE_ADJUST_MINX => 0,
    CIRCLE_ADJUST_MINY => -0.001 * 600, #-1, #circles were a little too high, so nudge them a little lower
    CIRCLE_ADJUST_MAXX => +0.001 * 600, #+1, #circles were a little too far to the left, so nudge them a little to the right
    CIRCLE_ADJUST_MAXY => 0,
    SUBST_CIRCLE_CLIPRECT => FALSE, #generate circle and substitute for clip rects (to compensate for the way some CAD software draws circles)
    WANT_CLIPRECT => TRUE, #FALSE, #AI doesn't need clip rect at all? should be on normally?
    RECT_COMPLETION => FALSE, #TRUE, #fill in 4th side of rect when 3 sides found
};

#allow .012 clearance around pads for solder mask:
#This value effectively adjusts pad sizes in the TOOL_SIZES list above (only for solder mask layers).
use constant SOLDER_MARGIN => +.012; #units are inches

#line join/cap styles:
use constant
{
    CAP_NONE => 0, #butt (none); line is exact length
    CAP_ROUND => 1, #round cap/join; line overhangs by a semi-circle at either end
    CAP_SQUARE => 2, #square cap/join; line overhangs by a half square on either end
    CAP_OVERRIDE => FALSE, #cap style overrides drawing logic
};
    
#number of elements in each shape type:
use constant
{
    RECT_SHAPELEN => 6, #x0, y0, x1, y1, count, "rect" (start, end corners)
    LINE_SHAPELEN => 6, #x0, y0, x1, y1, count, "line" (line seg)
    CURVE_SHAPELEN => 10, #xstart, ystart, x0, y0, x1, y1, xend, yend, count, "curve" (bezier 2 points)
    CIRCLE_SHAPELEN => 5, #x, y, 5, count, "circle" (center + radius)
};
#const my %SHAPELEN =
#Readonly my %SHAPELEN =>
our %SHAPELEN =
(
    rect => RECT_SHAPELEN,
    line => LINE_SHAPELEN,
    curve => CURVE_SHAPELEN,
    circle => CIRCLE_SHAPELEN,
);

#panelization:
#This will repeat the entire body the number of times indicated along the X or Y axes (files grow accordingly).
#Display elements that overhang PCB boundary can be squashed or left as-is (typically text or other silk screen markings).
#Set "overhangs" TRUE to allow overhangs, FALSE to truncate them.
#xpad and ypad allow margins to be added around outer edge of panelized PCB.
use constant PANELIZE => {'x' => 1, 'y' => 1, 'xpad' => 0, 'ypad' => 0, 'overhangs' => TRUE}; #number of times to repeat in X and Y directions

# Set this to 1 if you need TurboCAD support.
#$turboCAD = FALSE; #is this still needed as an option?

#CIRCAD pad generation uses an appropriate aperture, then moves it (stroke) "a little" - we use this to find pads and distinguish them from PCB holes. 
use constant PAD_STROKE => 0.3; #0.0005 * 600; #units are pixels
#convert very short traces to pads or holes:
use constant TRACE_MINLEN => .001; #units are inches
#use constant ALWAYS_XY => TRUE; #FALSE; #force XY even if X or Y doesn't change; NOTE: needs to be TRUE for all pads to show in FlatCAM and ViewPlot
use constant REMOVE_POLARITY => FALSE; #TRUE; #set to remove subtractive (negative) polarity; NOTE: must be FALSE for ground planes

#PDF uses "points", each point = 1/72 inch
#combined with a PDF scale factor of .12, this gives 600 dpi resolution (1/72 * .12 = 600 dpi)
use constant INCHES_PER_POINT => 1/72; #0.0138888889; #multiply point-size by this to get inches

# The precision used when computing a bezier curve. Higher numbers are more precise but slower (and generate larger files).
#$bezierPrecision = 100;
use constant BEZIER_PRECISION => 36; #100; #use const; reduced for faster rendering (mainly used for silk screen and thermal pads)

# Ground planes and silk screen or larger copper rectangles or circles are filled line-by-line using this resolution.
use constant FILL_WIDTH => .01; #fill at most 0.01 inch at a time

# The max number of characters to read into memory
use constant MAX_BYTES => 10 * M; #bumped up to 10 MB, use const

use constant DUP_DRILL1 => TRUE; #FALSE; #kludge: ViewPlot doesn't load drill files that are too small so duplicate first tool

my $runtime = time(); #Time::HiRes::gettimeofday(); #measure my execution time

print STDERR "Loaded config settings from '${\(__FILE__)}'.\n";
1; #last value must be truthful to indicate successful load


#############################################################################################
#junk/experiment:

#use Package::Constants;
#use Exporter qw(import); #https://perldoc.perl.org/Exporter.html

#my $caller = "pdf2gerb::";

#sub cfg
#{
#    my $proto = shift;
#    my $class = ref($proto) || $proto;
#    my $settings =
#    {
#        $WANT_DEBUG => 990, #10; #level of debug wanted; higher == more, lower == less, 0 == none
#    };
#    bless($settings, $class);
#    return $settings;
#}

#use constant HELLO => "hi there2"; #"main::HELLO" => "hi there";
#use constant GOODBYE => 14; #"main::GOODBYE" => 12;

#print STDERR "read cfg file\n";

#our @EXPORT_OK = Package::Constants->list(__PACKAGE__); #https://www.perlmonks.org/?node_id=1072691; NOTE: "_OK" skips short/common names

#print STDERR scalar(@EXPORT_OK) . " consts exported:\n";
#foreach(@EXPORT_OK) { print STDERR "$_\n"; }
#my $val = main::thing("xyz");
#print STDERR "caller gave me $val\n";
#foreach my $arg (@ARGV) { print STDERR "arg $arg\n"; }

Download Details:

Author: swannman
Source Code: https://github.com/swannman/pdf2gerb

License: GPL-3.0 license

#perl 

Helena Páez Hijo

Helena Páez Hijo

1620202972

How we use Web Components at GitHub

GitHub has long been a proponent of Web Components. Here’s how we use them.

At GitHub, we pride ourselves on delivering a first-class developer experience. A considerable part of our work is on our front end, which we strive to keep as lightweight, fast, and accessible as possible. For a product as large as GitHub, this can be quite the task. Like many front-end codebases, we leverage components, independent, isolated, and reusable pieces of code that allow application teams to deliver high fidelity UI quickly and efficiently while still keeping to our high standards of quality.

We’re using Web Components in a big way at GitHub. We have over a dozen open-source Web Components and with dozens more that are closed source.

How we got here

When GitHub launched over a decade ago, we had a modest front-end codebase that mostly used jQuery. Ten years and nearly 85,000 lines of code later, we had a large front-end codebase that was starting to show growing pains. We ultimately transitioned away from jQuery (for reasons which we detailed in a blog post at the time) and started using new technologies which could better solve our problems.

We began to dabble with a new technology called Web Components, a set of native browser technologies that allow the development of customized HTML elements, progressively enhanced with JavaScript.

We chose to use Web Components because our codebase was already structured into component-like behaviors. Still, as the GitHub monolith grew in size, we saw the need to implement better encapsulations before the front-end became unmanageable – and Web Components fit the bill. Web Components offered better portability and encapsulation than our existing JavaScript behaviors. We were happy to experiment with Web Components alongside our existing front-end infrastructure since it doesn’t incur any upfront cost or “buy-in” to a specific framework.

Our first two custom elements shipped in 2014: elative-time and local-time, which show times and dates in friendly formats, and include-fragment, which allows us to lazy load HTML fragments. Slowly we realized just how powerful these elements could be and began replacing design patterns within the codebase wholesale, such as replacing our “facebox” modal dialog pattern with details-dialog. Our components now range from very generic, multi-purpose behaviors like remote-input to specific single-purpose components such as the markdown-toolbar element and its siblings.

For the power Web Components affords, there are still pain points and pitfalls. With such a large codebase owned by hundreds of engineers across dozens of teams, we need to provide as much support and tooling as possible, encoding best practices without manual code review becoming a bottleneck.

#github #web-components #web-development #programming #developer

General Koelpin

General Koelpin

1598812380

Web Components at Github

Kristján Oddsson detailed at the Web Components SF meetup how GitHub uses Web Components and the patterns GitHub identified to foster readable, performant, and accessible front end components.

Oddsson started by illustrating how a a simple behavior would be implemented in vanilla JavaScript at GitHub:

on('click', 'js-hello-world-button', function (event) {
  const button = event.currentTarget;
  const container = button.closest('js-hello-world');

  const input = container.querySelector('js-hello-world-input');
  const output = container.querySelector('js-hello-world-output');

  output.textContent = `Hello, ${input.value}`
}

with the corresponding HTML on the page:

<div class="js-hello-world">
  <input class="js-hello-world-input" type="text">
  <button class="js-hello-world-button">
    Greet
  </button>

   
</div>

The previous code does not rely on any abstractions beyond the standard web APIs and as such may be among the most efficient way to write the required behavior (displaying a welcome message on a button click). However, Oddsson mentioned a few issues with the approach: a naming scheme is required, the DOM querying is explicit, classes are not scoped and could be overloaded unwillingly. This results in more work on the developer side.

Oddsson then explained that the team at GitHub has been converting behaviors like the previous one into progressively-enhanced custom elements. GitHub’s custom elements align as much as possible on built-in elements behavior. GitHub custom elements additionally do not use the shadow DOM.

Oddsson then uses the <auto-check> custom element — that automatically check the availability of a repository name while the user is typing, to illustrate the boilerplate involved in writing web components.

First, custom elements define an interface that includes four methods (connectedCallback, disconnectedCallback adoptedCallback, attributeChangedCallback) corresponding to different stages of the lifecycle of the element. An observedAttributes method also specifies which attributes to notice change for. Additionally, a custom element typically would have methods to retrieve and set the attributes that constitute the interface it exposes to the component users.

Then custom elements must be added to the registry if they are not already there (window.customElements.define method). The DOM elements that are involved in the behavior must also be queried — this.querySelector('input') for instance retrieves the input child element where the user enters the repository name. Additionally, as GitHub uses TypeScript, the relevant types must be created:

declare global {
  interface Window {
    AutoCheckElement: typeof AutoCheckElement
  }
  interface HTMLElementTagNameMap {
    'auto-check': AutoCheckElement
  }
}

#javascript #github #web components #web development #development #architecture & design #news

Spring Framework

Spring Framework

1642110180

Spring: A Static Web Site Generator Written By GitHub Issues

Spring

Spring is a blog engine written by GitHub Issues, or is a simple, static web site generator. No more server and database, you can setup it in free hosting with GitHub Pages as a repository, then post the blogs in the repository Issues.

You can add some labels in your repository Issues as the blog category, and create Issues for writing blog content through Markdown.

Spring has responsive templates, looking good on mobile, tablet, and desktop.Gracefully degrading in older browsers. Compatible with Internet Explorer 10+ and all modern browsers.

Get up and running in seconds.

中文介绍

Quick start guide

For the impatient, here's how to get a Spring blog site up and running.

First of all

  • Fork the Spring repository as yours.
  • Goto your repository settings page to rename Repository Name.
  • Hosted directly on GitHub Pages from your project repository, you can take it as User or organization site or Project site(create a gh-pages branch).
  • Also, you can set up a custom domain with Pages.

Secondly

  • Open the index.html file to edit the config variables with yours below.
$.extend(spring.config, {
  // my blog title
  title: 'Spring',
  // my blog description
  desc: "A blog engine written by github issues [Fork me on GitHub](https://github.com/zhaoda/spring)",
  // my github username
  owner: 'zhaoda',
  // creator's username
  creator: 'zhaoda',
  // the repository name on github for writting issues
  repo: 'spring',
  // custom page
  pages: [
  ]
})
  • Put your domain into the CNAME file if you have.
  • Commit your change and push it.

And then

  • Goto your repository settings page to turn on the Issues feature.
  • Browser this repository's issues page, like this https://github.com/your-username/your-repo-name/issues?state=open.
  • Click the New Issue button to just write some content as a new one blog.

Finally

  • Browser this repository's GitHub Pages url, like this http://your-username.github.io/your-repo-name, you will see your Spring blog, have a test.
  • And you're done!

Custom development

Installation

  • You will need a web server installed on your system, for example, Nginx, Apache etc.
  • Configure your spring project to your local web server directory.
  • Run and browser it, like http://localhost/spring/dev.html .
  • dev.html is used to develop, index.html is used to runtime.

Folder Structure

spring/
├── css/
|    ├── boot.less  #import other less files
|    ├── github.less  #github highlight style
|    ├── home.less  #home page style
|    ├── issuelist.less #issue list widget style
|    ├── issues.less #issues page style
|    ├── labels.less #labels page style
|    ├── main.less #commo style
|    ├── markdown.less #markdown format style
|    ├── menu.less #menu panel style
|    ├── normalize.less #normalize style
|    ├── pull2refresh.less #pull2refresh widget style
|    └── side.html  #side panel style
├── dist/
|    ├── main.min.css  #css for runtime
|    └── main.min.js  #js for runtime
├── img/  #some icon, startup images
├── js/
|    ├── lib/  #some js librarys need to use
|    ├── boot.js  #boot
|    ├── home.js  #home page
|    ├── issuelist.js #issue list widget
|    ├── issues.js #issues page
|    ├── labels.js #labels page
|    ├── menu.js #menu panel
|    ├── pull2refresh.less #pull2refresh widget
|    └── side.html  #side panel
├── css/
|    ├── boot.less  #import other less files
|    ├── github.less  #github highlight style
|    ├── home.less  #home page style
|    ├── issuelist.less #issue list widget style
|    ├── issues.less #issues page style
|    ├── labels.less #labels page style
|    ├── main.less #commo style
|    ├── markdown.less #markdown format style
|    ├── menu.less #menu panel style
|    ├── normalize.less #normalize style
|    ├── pull2refresh.less #pull2refresh widget style
|    └── side.html  #side panel style
├── dev.html #used to develop
├── favicon.ico #website icon
├── Gruntfile.js #Grunt task config
├── index.html #used to runtime
└── package.json  #nodejs install config

Customization

  • Browser http://localhost/spring/dev.html, enter the development mode.
  • Changes you want to modify the source code, like css, js etc.
  • Refresh dev.html view change.

Building

  • You will need Node.js installed on your system.
  • Installation package.
bash

$ npm install

*   Run grunt task.

    ```bash
$ grunt
  • Browser http://localhost/spring/index.html, enter the runtime mode.
  • If there is no problem, commit and push the code.
  • Don't forget to merge master branch into gh-pages branch if you have.
  • And you're done! Good luck!

Report a bug

Who used

If you are using, please tell me.

Download Details:
Author: zhaoda
Source Code: https://github.com/zhaoda/spring
License: MIT License

#spring #spring-framework #spring-boot #java 

Kabanda Nat

Kabanda Nat

1624094899

[Part 2]: Using Lightning Web Components to Create Progressive Web Apps

When a server sends a push notification to a subscribed user, it needs to authenticate itself as the same server to which the user subscribed. To do this, there is an entire spec (called the VAPID spec) that dictates how this authentication works. Fortunately for us, the web-push package helps to abstract away most of these low-level details.

The one thing we do need to do, however, is generate a VAPID public/private key pair, and store it in a .env file so we can access those keys as environment variables.

#web dev #progressive #web apps #lightning web #components