Local DB

Description

The Local DB system provides access to the browser's local storage, allowing you to store and retrieve data that persists between page refreshes and browser sessions.

Methods

localDbGet(key)

Retrieves a value from local storage by key.

// Get a simple value
score = localDbGet("highscore")
if score == null (
  score = 0  // Default value if nothing stored
)

// Get an object
settings = localDbGet("userPrefs")
if settings (
  theme = settings.theme
  volume = settings.volume
)

// Using nullish coalescing for defaults
highScore = localDbGet("highscore") ?? 0

localDbSet(key, value)

Stores a value in local storage under a specified key.

// Store a simple value
localDbSet("highscore", 100)

// Store an object
settings = {
  theme: "dark",
  volume: 0.8
}
localDbSet("userPrefs", settings)

// Store an array
favorites = ["red", "blue", "green"]
localDbSet("favoriteColors", favorites)

localDbDel(key)

Deletes a value from local storage by key.

// Delete a single value
localDbDel("highscore")

// Delete user preferences
localDbDel("userPrefs")

// Example: Clear data when user logs out
localDbDel("userPrefs")
localDbDel("highscore")
localDbDel("favoriteColors")

Complete Example

// Save user preferences
prefs = {
  theme: "dark",
  volume: 0.8
}
localDbSet("userPrefs", prefs)

// Later retrieve preferences
saved = localDbGet("userPrefs")
if saved (
  theme = saved.theme
  volume = saved.volume
)

// Save high score if better than previous
if score > localDbGet("highscore") ?? 0 (
  localDbSet("highscore", score)
)

Important Notes

• Data is stored in the user's browser local storage

• Data persists between page refreshes and browser sessions

• Storage is limited to the browser's local storage capacity

• Data is specific to the domain/origin of the page

• Values are automatically serialized to JSON when stored

• Returns null if a key doesn't exist