2017-08

Tips for typing import statements in JavaScript

[2017-08-23] dev, javascript, esnext, jsmodules, vscode

This blog post gives tips for typing import statements more quickly, including a helpful text snippet for Visual Studio Code.

Beyond typeof and instanceof: simplifying dynamic type checks

[2017-08-18] dev, javascript, esnext, es proposal, typedjs

This blog post describes a technique for making instanceof applicable to more values (on the right-hand side). Specifically, for primitive values.

ES2019: optional catch binding

[2017-08-13] dev, javascript, es2019, error handling

The proposal “Optional catch binding” by Michael Ficarra is at stage 4 and therefore part of ECMAScript 2019. This blog post explains how it works.

ES proposal: Promise.try()

[2017-08-09] dev, javascript, esnext, es proposal, async, promises

The proposal “Promise.try()” by Jordan Harband is currently at stage 1. This blog post explains how it works.

Passing data between Promise callbacks

[2017-08-08] dev, javascript, esnext, async, promises

In Promise-based code, there are usually many callbacks, each one having a separate scope for variables. What if you want to share data between those callbacks? This blog post describes techniques for doing so.

2017-07

ES proposal: class fields

[2017-07-28] dev, javascript, esnext, es proposal, classes

The ECMAScript proposal “Class Fields” by Daniel Ehrenberg and Jeff Morrison is currently at stage 3. This blog post explains how it works.

ES2018: Promise.prototype.finally()

[2017-07-26] dev, javascript, esnext, es2018, promises

The proposal “Promise.prototype.finally” by Jordan Harband is at stage 4. This blog post explains it.

A minimal setup for Babel-based npm packages

[2017-07-24] dev, javascript, esnext, npm, jsmodules, babel

This blog post describes a minimal setup for producing npm packages via Babel. You can see that setup in action in the GitHub repository for re-template-tag.

Composing regular expressions via re-template-tag

[2017-07-22] dev, javascript, regexp, template literals

I’ve written the small library re-template-tag that provides a template tag function for composing regular expressions. This blog post explains how it works.

ES2018: s (dotAll) flag for regular expressions

[2017-07-20] dev, javascript, esnext, es2018, regexp

The proposal “s (dotAll) flag for regular expressions” by Mathias Bynens is at stage 4. This blog post explains how it works.