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Ramda's Type Check

Ramda's type checking returns a string, but in order for this to be useful, one needs to know if the returned value matches your intended assertion.

R.type({}); //=> "Object"
R.type(1); //=> "Number"
R.type(false); //=> "Boolean"
R.type('s'); //=> "String"
R.type(null); //=> "Null"
R.type([]); //=> "Array"
R.type(/[A-z]/); //=> "RegExp"
R.type(() => {}); //=> "Function"
R.type(undefined); //=> "Undefined"

Backpressure for Promises

When dealing with promises, the processing of long-running tasks is the commonly encountered scenario. However, some long-running task might also be performing memory intensive operations. To deal with running multiple operations at once, it is important to place a limit on the number of promises allowed to run at the same time as to not exhaust the Nodejs JavaScript heap.

Cjstoesm

Automate the process of converting over JavaScript files in the cjs format to the newer ESM format with the command line.

Gremlins Tracker for Visual Studio Code

Invisible characters that are non-standard in certain file types may cause unexpected problems. This plugin will highlight these whitespace characters in your files.

Problem with URL Resolution

Up to Snowpack version 3.8.8, there is an issue with how Snowpack resolves path references inside CSS files. This often creates a problem when importing font files as mentioned on this page.

Ensuring Consistent Execution Path

In this example, a script might refer to a file, index.tex, which is referenced by Pandoc to convert a file located within a folder:

/contents
  index.tex

spawn('pandoc', [
  '/the/full/path/to/contents/index.tex',
  '-o',
  '/the/full/path/to/output/index.html',
  '-s'
]);

Set up @web/test-runner

Snowpack recommends that @web/test-runner be used as the test runner of choice. Using this setup will allow you to conveniently run tests that would run in the browser after the Snowpack dev server has started.

First, install the dependencies found in the "devDependencies" in package.json with

npm install @esm-bundle/chai @snowpack/web-test-runner-plugin @web/test-runner