>Classes are a core programming concept While I don't disagree with this, classes in their current incarnation were shoehorned onto Javascript's prototype-base

>Classes are a core programming concept While I don't disagree with this, classes in their current incarnation were shoehorned onto Javascript's prototype-based object inheritance mechanism relatively recently. Javascript classes have enough idiosyncratic behavior that half of what you learn is essentially one-off, inapplicable elsewhere. As mentioned in the "motivation" section[1], binding to the `this` pointer of the surrounding class efficiently in every context is not a simple proposition. The naive way to do it introduces a bug (`this` ends up pointing at the component passed the callback instead of the class) or creates unnecessary closure instantiation on every rendering frame. 1. https://babeljs.io/docs/en/babel-plugin-proposal-class-properties https://babeljs.io/docs/en/babel-plugin-proposal-class-prope...