享元模式(Flyweight Pattern)

主要用于减少创建对象的数量，以减少内存占用和提高性能。这种类型的设计模式属于结构型模式，它提供了减少对象数量从而改善应用所需的对象结构的方式。

let textCount = 0;
let textAttrCount = 0;

class Text {
  constructor() {
    this.text = "";
  }
  add(text) {
    this.text = text;
    textCount++;
  }
}

class TextAttr {
  constructor() {}
  add(color, size) {
    this.color = color;
    this.size = size;
    textAttrCount++;
  }
}

class TextFactory {
  constructor() {
    this.textObj = new Text();
    this.resultText = [];
  }
  create(text, color, size) {
    if (this.textObj.text != text) {
      this.textObj = new Text();
      this.textObj.add(text);
    }
    let textAttr = new TextAttr();
    textAttr.add(color, size);
    this.resultText.push({
      id: this.textObj.text + textAttr.color + textAttr.size,
      text: this.textObj.text,
      color: textAttr.color,
      size: textAttr.size,
    });
  }

  get() {
    return this.resultText;
  }

  getCount() {
    return {
      textCount,
      textAttrCount,
    };
  }
}

export default TextFactory;

let text01 = new TextFactory();
text01.create("hello world", "red", 14);
text01.create("hello world", "blue", 16);
text01.create("hello world", "green", 15);
text01.create("what the fuck~", "gray", 30);
text01.get();
text01.getCount();

#享元模式(Flyweight Pattern)

享元模式(Flyweight Pattern)