Contributing to Pokemon Showdown

./pokemon-showdown help

// Backticks for interpolation
const moveId = `move-${move.id}`;

// Backticks for HTML/protocol code
const html = `<strong>Fire Blast</strong>`;

// Single quotes for IDs (not displayed to users)
const id = 'fireblast';

// Double quotes for user-facing text
const name = "Fire Blast";

// Good
function getUser(id: string): User | null {
  // ...
}

// Legacy code may use undefined or false - convert to null

// Thunder Wave hits Ground type
immunityChecker.return(false); // Shows immunity message

// Volt Absorb absorbs Thunder Wave
voltAbsorb.return(null); // No additional failure message

// Water Absorb doesn't interact with Thunder Wave
waterAbsorb.return(undefined); // Continue checking other handlers

const value = input || defaultValue;

/** null = not accepting connections */
let numConnections: number | null = null;

// Chrome won't update unless you do this
elem.innerHTML = elem.innerHTML;

// GET IT? BECAUSE WE DON'T KNOW WHAT SPECIES IT IS???
if (!species) species = 'Unown';

// Prefer union types over enums
type Category = 'Physical' | 'Special' | 'Status';

// Prefer for...of over forEach
for (const item of items) {
  // ...
}