@web-atoms/core/dist/core/BindableProperty.js

Web Atoms Core

System.register(["./AtomBinder"], function (_export, _context) {
  "use strict";

  var AtomBinder;
  function BindableProperty(target, key) {
    const iVal = target[key];
    const keyName = "_" + key;
    target[keyName] = iVal;
    const getter = function () {
      return this[keyName];
    };
    const setter = function (newVal) {
      const oldValue = this[keyName];
      if (oldValue === undefined ? oldValue === newVal : oldValue == newVal) {
        return;
      }
      const ce = this;
      if (ce.onPropertyChanging) {
        ce.onPropertyChanging(key, oldValue, newVal);
      }
      this[keyName] = newVal;
      AtomBinder.refreshValue(this, key);
    };
    if (delete target[key]) {
      Object.defineProperty(target, key, {
        get: getter,
        set: setter,
        enumerable: true,
        configurable: true
      });
    }
  }
  _export("BindableProperty", BindableProperty);
  return {
    setters: [function (_AtomBinder) {
      AtomBinder = _AtomBinder.AtomBinder;
    }],
    execute: function () {}
  };
});
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