html-squircle/dist/esm/utils/LRUCache.js

Utilities for generating superellipse squircles in the form of SVG strings, to be used in clip-path and background inline styles.

export class LRUCache {
  cache;
  capacity;
  constructor(capacity) {
    this.cache = new Map();
    this.capacity = Math.max(capacity, 1);
  }
  get(key) {
    const value = this.cache.get(key);
    if (value === undefined) {
      return undefined;
    }
    // Reset the position
    this.cache.set(key, value);
    return value;
  }
  set(key, value) {
    /** Delete in case it already exists so that setting corrects the position */
    this.cache.delete(key);
    this.cache.set(key, value);
    // Prune if necessary
    if (this.cache.size > this.capacity) {
      this.prune();
    }
  }
  has(key) {
    return this.cache.has(key);
  }
  setCapacity(capacity) {
    if (capacity !== undefined && capacity !== this.capacity) {
      this.capacity = Math.max(capacity, 1);
      while (this.capacity < this.cache.size) {
        this.prune();
      }
    }
  }
  prune() {
    // Oldest keys are first in the list
    for (const [key] of this.cache) {
      this.cache.delete(key);
      // Only loop once
      return;
    }
  }
}