react-native-reanimated/lib/module/reanimated2/js-reanimated/MutableValue.js

More powerful alternative to Animated library for React Native.

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

export default class MutableValue {
  constructor(value, setter) {
    _defineProperty(this, "_id", void 0);

    _defineProperty(this, "_value", void 0);

    _defineProperty(this, "_setter", void 0);

    _defineProperty(this, "_animation", null);

    _defineProperty(this, "_listeners", []);

    this._id = MutableValue.MUTABLE_ID++;
    this._value = value;
    this._setter = setter;
  }

  get value() {
    return this._value;
  }

  set value(nextValue) {
    this._setter(nextValue);
  } // this changes the value finally and is supposed to be called from this._setter


  _setValue(newValue) {
    this._value = newValue;

    this._triggerListener();
  }

  addListener(listener) {
    this._listeners.push(listener);
  }

  _triggerListener() {
    for (let i = 0, len = this._listeners.length; i < len; ++i) {
      this._listeners[i]();
    }
  }

}

_defineProperty(MutableValue, "MUTABLE_ID", 1);
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