Note: Page numbers used here are the ones for the "haskell-programming-1.0RC4-screen" version of the book.
Content in question: "Their reviews helped ensure the book is suitable for both beginners and comprehensive."
Critique: This line doesn't appear to be grammatically correct or at the very least it's worded awkwardly.
| // The `class` property for Hyperapp virtual DOM elements can take multiple | |
| // forms. This function is able to merge two such values using the form | |
| // of the initial value if possible. | |
| const mergeClasses = (a, b) => { | |
| if (typeof a === "boolean") { | |
| return b | |
| } | |
| if (typeof a === "string") { | |
| if (typeof b === "boolean") { |
Hyperapp comes with TypeScript support out-of-the-box. For those unaware, TypeScript is essentially JavaScript with the added precision of static typing, amongst other things. For the remainder of this document we'll assume you have some familiarity setting up and working with TypeScript so we can focus on Hyperapp-specific info.
Hyperapp's type definitions take advantage of certain others that come bundled with TypeScript. So, in your project's tsconfig.json be sure to have at a bare minimum:
For context:
graph TD
viewEvent["view event"]