Shubham Ankit

Shubham Ankit

1563782390

Visual Studio Code Settings and Extensions for Faster JavaScript Development

I have been using Visual Studio Code for more than two years, when I jumped on it from Sublime Text.

I spend about 5–6 hours every day inside VS Code so it’s imperative that it is tailored to my needs to make me as productive as possible. Over the years, I have tried many extensions and settings but now I feel settled with what I have so it’s worth talking about them.

Extensions

Prettier Code Formatter

I use Prettier for code formatting across all of my projects and I’ve set up this extension so that it automatically formats my HTML/CSS/JS when I hit ⌘ + S. This has allowed me to get rid of language-specific code formatters.

npm

I use this extension along with npm intellisense (below) to ensure that my package.json is up to date and not bloated with modules that I am not using.

npm Intellisense

This extension indexes my package.json and allows me to autocomplete my import statements when requiring modules.

Bracket Pair Colorizer

This extension color codes all of my brackets, allowing me to quickly see where each code block starts and ends.

React Refactor

This is the newest extension that I have added to my arsenal and I really like it. It lets you select some JSX and refactor it out into a custom React Class, function, or hook.

Auto Close Tag

Another simple extension that does one thing well: auto-closes my JSX tags.

GitLens

I recently moved from the native Source Control setting that VSCode has to Gitlens. I like this extension because it lets me:

  • Automatically see the git blame for the current line
  • View a more detailed history on hover
  • Reset changes via the gutter

Simple React Snippets

I write so much React code that I needed an extension to help me save some time. I now use this extension to fill in some of the boilerplate that comes along with writing React components.

Markdown All in One

This extension helps me a lot when writing READMEs, or other Markdown documents. I specifically enjoy how it deals with lists, tables, and table of contents.

User Settings

Apart from the extensions, the other aspect of customizing your VS Code experience are your User Settings. I have shared my complete Settings file below, but here are some of the important bits:

Font Settings

I really like fonts with ligatures. If you are unfamiliar with ligatures, they are special characters that parses and joins multiple characters. I primarily use Fira Code as my programming font. Here’s how it renders JavaScript:

My complete font stack is:

"editor.fontFamily": "'Fira Code', 'Operator Mono', 'iA Writer Duospace', 'Source Code Pro', Menlo, Monaco, monospace", "editor.fontLigatures": true,

To detect indentation, I also prefer these settings:

"editor.detectIndentation": true, 
"editor.renderIndentGuides": false,

To help manage my imports, I prefer these:

// Enable auto-updating of import paths when you rename a file. "javascript.updateImportsOnFileMove.enabled": "always",

Emmet

Emmet now comes included with VS Code now, but to make it work well with React, I had to update some of the settings.

"emmet.includeLanguages": { 
  "javascript": "javascriptreact", 
  "jsx-sublime-babel-tags": "javascriptreact"
}, 
"emmet.triggerExpansionOnTab": true, "emmet.showExpandedAbbreviation": "never",

Here’s my complete user-settings.json

{
  "editor.formatOnSave": true,
  // Enable per-language
  "[javascript]": {
    "editor.formatOnSave": true
  },
  "[json]": {
    "editor.formatOnSave": true
  },
  "emmet.syntaxProfiles": {
    "javascript": "jsx",
    "xml": {
      "attr_quotes": "single"
    }
  },
  "editor.lineHeight": 22,
  "javascript.validate.enable": false,
  "workbench.editor.enablePreview": false,
  "javascript.updateImportsOnFileMove.enabled": "always",
  "prettier.trailingComma": "all",
  "bracketPairColorizer.forceIterationColorCycle": true,
  "editor.fontWeight": "500",
  "editor.fontLigatures": true,
  "editor.letterSpacing": 0.5,
  "editor.cursorWidth": 5,
  "editor.renderWhitespace": "all",
  "editor.snippetSuggestions": "top",
  "editor.glyphMargin": true,
  "editor.minimap.enabled": false,
  "terminal.integrated.fontWeight": "400",
  "editor.fontFamily": "Fira Code, iA Writer Duospace, Menlo, Monaco, 'Courier New', monospace",
  "editor.fontSize": 14,
  "window.zoomLevel": -1,
  "files.trimTrailingWhitespace": true,
  "files.trimFinalNewlines": true,
  "workbench.fontAliasing": "auto",
  "terminal.integrated.macOptionIsMeta": true,

  "prettier.bracketSpacing": true,
  "terminal.integrated.fontSize": 14,
  "terminal.integrated.fontWeightBold": "700",
  "terminal.integrated.lineHeight": 1.6,
  "workbench.colorTheme": "Shades of Purple",
  // SOP's Import Cost Extension Settings.
  "importCost.largePackageColor": "#EC3A37F5",
  "importCost.mediumPackageColor": "#B362FF",
  "importCost.smallPackageColor": "#B362FF"
}

For more tips and tricks about Visual Studio Code, I recommend checking out VSCode Can Do That.

Originally published by Tilo at tilomitra.com

#visual-studio #javascript #web-development

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Visual Studio Code Settings and Extensions for Faster JavaScript Development

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Hermann Frami

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A Simple Wrapper Around Amplify AppSync Simulator

This serverless plugin is a wrapper for amplify-appsync-simulator made for testing AppSync APIs built with serverless-appsync-plugin.

Install

npm install serverless-appsync-simulator
# or
yarn add serverless-appsync-simulator

Usage

This plugin relies on your serverless yml file and on the serverless-offline plugin.

plugins:
  - serverless-dynamodb-local # only if you need dynamodb resolvers and you don't have an external dynamodb
  - serverless-appsync-simulator
  - serverless-offline

Note: Order is important serverless-appsync-simulator must go before serverless-offline

To start the simulator, run the following command:

sls offline start

You should see in the logs something like:

...
Serverless: AppSync endpoint: http://localhost:20002/graphql
Serverless: GraphiQl: http://localhost:20002
...

Configuration

Put options under custom.appsync-simulator in your serverless.yml file

| option | default | description | | ------------------------ | -------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- | | apiKey | 0123456789 | When using API_KEY as authentication type, the key to authenticate to the endpoint. | | port | 20002 | AppSync operations port; if using multiple APIs, the value of this option will be used as a starting point, and each other API will have a port of lastPort + 10 (e.g. 20002, 20012, 20022, etc.) | | wsPort | 20003 | AppSync subscriptions port; if using multiple APIs, the value of this option will be used as a starting point, and each other API will have a port of lastPort + 10 (e.g. 20003, 20013, 20023, etc.) | | location | . (base directory) | Location of the lambda functions handlers. | | refMap | {} | A mapping of resource resolutions for the Ref function | | getAttMap | {} | A mapping of resource resolutions for the GetAtt function | | importValueMap | {} | A mapping of resource resolutions for the ImportValue function | | functions | {} | A mapping of external functions for providing invoke url for external fucntions | | dynamoDb.endpoint | http://localhost:8000 | Dynamodb endpoint. Specify it if you're not using serverless-dynamodb-local. Otherwise, port is taken from dynamodb-local conf | | dynamoDb.region | localhost | Dynamodb region. Specify it if you're connecting to a remote Dynamodb intance. | | dynamoDb.accessKeyId | DEFAULT_ACCESS_KEY | AWS Access Key ID to access DynamoDB | | dynamoDb.secretAccessKey | DEFAULT_SECRET | AWS Secret Key to access DynamoDB | | dynamoDb.sessionToken | DEFAULT_ACCESS_TOKEEN | AWS Session Token to access DynamoDB, only if you have temporary security credentials configured on AWS | | dynamoDb.* | | You can add every configuration accepted by DynamoDB SDK | | rds.dbName | | Name of the database | | rds.dbHost | | Database host | | rds.dbDialect | | Database dialect. Possible values (mysql | postgres) | | rds.dbUsername | | Database username | | rds.dbPassword | | Database password | | rds.dbPort | | Database port | | watch | - *.graphql
- *.vtl | Array of glob patterns to watch for hot-reloading. |

Example:

custom:
  appsync-simulator:
    location: '.webpack/service' # use webpack build directory
    dynamoDb:
      endpoint: 'http://my-custom-dynamo:8000'

Hot-reloading

By default, the simulator will hot-relad when changes to *.graphql or *.vtl files are detected. Changes to *.yml files are not supported (yet? - this is a Serverless Framework limitation). You will need to restart the simulator each time you change yml files.

Hot-reloading relies on watchman. Make sure it is installed on your system.

You can change the files being watched with the watch option, which is then passed to watchman as the match expression.

e.g.

custom:
  appsync-simulator:
    watch:
      - ["match", "handlers/**/*.vtl", "wholename"] # => array is interpreted as the literal match expression
      - "*.graphql"                                 # => string like this is equivalent to `["match", "*.graphql"]`

Or you can opt-out by leaving an empty array or set the option to false

Note: Functions should not require hot-reloading, unless you are using a transpiler or a bundler (such as webpack, babel or typescript), un which case you should delegate hot-reloading to that instead.

Resource CloudFormation functions resolution

This plugin supports some resources resolution from the Ref, Fn::GetAtt and Fn::ImportValue functions in your yaml file. It also supports some other Cfn functions such as Fn::Join, Fb::Sub, etc.

Note: Under the hood, this features relies on the cfn-resolver-lib package. For more info on supported cfn functions, refer to the documentation

Basic usage

You can reference resources in your functions' environment variables (that will be accessible from your lambda functions) or datasource definitions. The plugin will automatically resolve them for you.

provider:
  environment:
    BUCKET_NAME:
      Ref: MyBucket # resolves to `my-bucket-name`

resources:
  Resources:
    MyDbTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: myTable
      ...
    MyBucket:
      Type: AWS::S3::Bucket
      Properties:
        BucketName: my-bucket-name
    ...

# in your appsync config
dataSources:
  - type: AMAZON_DYNAMODB
    name: dynamosource
    config:
      tableName:
        Ref: MyDbTable # resolves to `myTable`

Override (or mock) values

Sometimes, some references cannot be resolved, as they come from an Output from Cloudformation; or you might want to use mocked values in your local environment.

In those cases, you can define (or override) those values using the refMap, getAttMap and importValueMap options.

  • refMap takes a mapping of resource name to value pairs
  • getAttMap takes a mapping of resource name to attribute/values pairs
  • importValueMap takes a mapping of import name to values pairs

Example:

custom:
  appsync-simulator:
    refMap:
      # Override `MyDbTable` resolution from the previous example.
      MyDbTable: 'mock-myTable'
    getAttMap:
      # define ElasticSearchInstance DomainName
      ElasticSearchInstance:
        DomainEndpoint: 'localhost:9200'
    importValueMap:
      other-service-api-url: 'https://other.api.url.com/graphql'

# in your appsync config
dataSources:
  - type: AMAZON_ELASTICSEARCH
    name: elasticsource
    config:
      # endpoint resolves as 'http://localhost:9200'
      endpoint:
        Fn::Join:
          - ''
          - - https://
            - Fn::GetAtt:
                - ElasticSearchInstance
                - DomainEndpoint

Key-value mock notation

In some special cases you will need to use key-value mock nottation. Good example can be case when you need to include serverless stage value (${self:provider.stage}) in the import name.

This notation can be used with all mocks - refMap, getAttMap and importValueMap

provider:
  environment:
    FINISH_ACTIVITY_FUNCTION_ARN:
      Fn::ImportValue: other-service-api-${self:provider.stage}-url

custom:
  serverless-appsync-simulator:
    importValueMap:
      - key: other-service-api-${self:provider.stage}-url
        value: 'https://other.api.url.com/graphql'

Limitations

This plugin only tries to resolve the following parts of the yml tree:

  • provider.environment
  • functions[*].environment
  • custom.appSync

If you have the need of resolving others, feel free to open an issue and explain your use case.

For now, the supported resources to be automatically resovled by Ref: are:

  • DynamoDb tables
  • S3 Buckets

Feel free to open a PR or an issue to extend them as well.

External functions

When a function is not defined withing the current serverless file you can still call it by providing an invoke url which should point to a REST method. Make sure you specify "get" or "post" for the method. Default is "get", but you probably want "post".

custom:
  appsync-simulator:
    functions:
      addUser:
        url: http://localhost:3016/2015-03-31/functions/addUser/invocations
        method: post
      addPost:
        url: https://jsonplaceholder.typicode.com/posts
        method: post

Supported Resolver types

This plugin supports resolvers implemented by amplify-appsync-simulator, as well as custom resolvers.

From Aws Amplify:

  • NONE
  • AWS_LAMBDA
  • AMAZON_DYNAMODB
  • PIPELINE

Implemented by this plugin

  • AMAZON_ELASTIC_SEARCH
  • HTTP
  • RELATIONAL_DATABASE

Relational Database

Sample VTL for a create mutation

#set( $cols = [] )
#set( $vals = [] )
#foreach( $entry in $ctx.args.input.keySet() )
  #set( $regex = "([a-z])([A-Z]+)")
  #set( $replacement = "$1_$2")
  #set( $toSnake = $entry.replaceAll($regex, $replacement).toLowerCase() )
  #set( $discard = $cols.add("$toSnake") )
  #if( $util.isBoolean($ctx.args.input[$entry]) )
      #if( $ctx.args.input[$entry] )
        #set( $discard = $vals.add("1") )
      #else
        #set( $discard = $vals.add("0") )
      #end
  #else
      #set( $discard = $vals.add("'$ctx.args.input[$entry]'") )
  #end
#end
#set( $valStr = $vals.toString().replace("[","(").replace("]",")") )
#set( $colStr = $cols.toString().replace("[","(").replace("]",")") )
#if ( $valStr.substring(0, 1) != '(' )
  #set( $valStr = "($valStr)" )
#end
#if ( $colStr.substring(0, 1) != '(' )
  #set( $colStr = "($colStr)" )
#end
{
  "version": "2018-05-29",
  "statements":   ["INSERT INTO <name-of-table> $colStr VALUES $valStr", "SELECT * FROM    <name-of-table> ORDER BY id DESC LIMIT 1"]
}

Sample VTL for an update mutation

#set( $update = "" )
#set( $equals = "=" )
#foreach( $entry in $ctx.args.input.keySet() )
  #set( $cur = $ctx.args.input[$entry] )
  #set( $regex = "([a-z])([A-Z]+)")
  #set( $replacement = "$1_$2")
  #set( $toSnake = $entry.replaceAll($regex, $replacement).toLowerCase() )
  #if( $util.isBoolean($cur) )
      #if( $cur )
        #set ( $cur = "1" )
      #else
        #set ( $cur = "0" )
      #end
  #end
  #if ( $util.isNullOrEmpty($update) )
      #set($update = "$toSnake$equals'$cur'" )
  #else
      #set($update = "$update,$toSnake$equals'$cur'" )
  #end
#end
{
  "version": "2018-05-29",
  "statements":   ["UPDATE <name-of-table> SET $update WHERE id=$ctx.args.input.id", "SELECT * FROM <name-of-table> WHERE id=$ctx.args.input.id"]
}

Sample resolver for delete mutation

{
  "version": "2018-05-29",
  "statements":   ["UPDATE <name-of-table> set deleted_at=NOW() WHERE id=$ctx.args.id", "SELECT * FROM <name-of-table> WHERE id=$ctx.args.id"]
}

Sample mutation response VTL with support for handling AWSDateTime

#set ( $index = -1)
#set ( $result = $util.parseJson($ctx.result) )
#set ( $meta = $result.sqlStatementResults[1].columnMetadata)
#foreach ($column in $meta)
    #set ($index = $index + 1)
    #if ( $column["typeName"] == "timestamptz" )
        #set ($time = $result["sqlStatementResults"][1]["records"][0][$index]["stringValue"] )
        #set ( $nowEpochMillis = $util.time.parseFormattedToEpochMilliSeconds("$time.substring(0,19)+0000", "yyyy-MM-dd HH:mm:ssZ") )
        #set ( $isoDateTime = $util.time.epochMilliSecondsToISO8601($nowEpochMillis) )
        $util.qr( $result["sqlStatementResults"][1]["records"][0][$index].put("stringValue", "$isoDateTime") )
    #end
#end
#set ( $res = $util.parseJson($util.rds.toJsonString($util.toJson($result)))[1][0] )
#set ( $response = {} )
#foreach($mapKey in $res.keySet())
    #set ( $s = $mapKey.split("_") )
    #set ( $camelCase="" )
    #set ( $isFirst=true )
    #foreach($entry in $s)
        #if ( $isFirst )
          #set ( $first = $entry.substring(0,1) )
        #else
          #set ( $first = $entry.substring(0,1).toUpperCase() )
        #end
        #set ( $isFirst=false )
        #set ( $stringLength = $entry.length() )
        #set ( $remaining = $entry.substring(1, $stringLength) )
        #set ( $camelCase = "$camelCase$first$remaining" )
    #end
    $util.qr( $response.put("$camelCase", $res[$mapKey]) )
#end
$utils.toJson($response)

Using Variable Map

Variable map support is limited and does not differentiate numbers and strings data types, please inject them directly if needed.

Will be escaped properly: null, true, and false values.

{
  "version": "2018-05-29",
  "statements":   [
    "UPDATE <name-of-table> set deleted_at=NOW() WHERE id=:ID",
    "SELECT * FROM <name-of-table> WHERE id=:ID and unix_timestamp > $ctx.args.newerThan"
  ],
  variableMap: {
    ":ID": $ctx.args.id,
##    ":TIMESTAMP": $ctx.args.newerThan -- This will be handled as a string!!!
  }
}

Requires

Author: Serverless-appsync
Source Code: https://github.com/serverless-appsync/serverless-appsync-simulator 
License: MIT License

#serverless #sync #graphql 

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10 Awesome Visual Studio Code Extensions for Frontend Developers

In this article I will recommend 10 VS Code extensions for frontend engineers working with HTML, CSS, JavaScript and frameworks like VueJS or ReactJS.

Visual Studio Code had 2.6 millions monthly active users in 2017 (last official number I could find, certainly more by now) and is the arguably the best code editor out there at the moment. One of the best features is the Market Place offering tons of extensions to customize it exactly to your needs and helping you in writing high quality code. In this article I will recommend 10 VS Code extensions for frontend engineers working with HTML, CSS, JavaScript and frameworks like VueJS or ReactJS.

  1. JavaScript Code Snippets
  2. NPM
  3. Prettier
  4. CSS Peek
  5. Vetur
  6. ESLint
  7. Live Sass Compiler
  8. Debugger for Chrome
  9. Live Server
  10. Beautify

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Writing Visual Studio Extensions with Mads - Episode 1: Item Templates

Join Mads Kristensen from the Visual Studio team each week as he builds extensions for Visual Studio live!

#visual studio code #visual studio #code #microsoft #visual studio extensions