deepmerge-plus/dist/index.esm.mjs

用於深度（遞迴）合併 JavaScript 物件的函式庫 / A library for deep (recursive) merging of JavaScript objects

import e from "is-mergeable-object";

function _shouldClone(e) {
  return !1 !== (null == e ? void 0 : e.clone);
}

function _defaultCheckShouldNotUpsertValue(e, t, r, n) {
  var l;
  return !_isUndefined(null === (l = r.target) || void 0 === l ? void 0 : l[r.key]);
}

function cloneUnlessOtherwiseSpecified(e, t, r, n) {
  const l = _shouldClone(t) && _isMergeableObject(e, t, r, n);
  let o = l ? deepmerge(function emptyTarget(e) {
    return Array.isArray(e) ? [] : {};
  }(e), e, t, n) : e;
  if (null != t && t.keyValueOrMode && !l && r && "key" in r && (r.destination && (o = r.destination[r.key] || o), 
  r.target && (o = r.target[r.key] || o), r.source && (o = r.source[r.key] || o)), 
  null != t && t.keyValueUpsertMode && !l && r && "key" in r) {
    let l = !1;
    if ("function" == typeof t.keyValueUpsertMode) l = t.keyValueUpsertMode(e, t, r, n); else if (!0 === t.keyValueUpsertMode) {
      var i;
      l = !_isUndefined(null === (i = r.target) || void 0 === i ? void 0 : i[r.key]);
    }
    if (l) {
      let e;
      r.destination && (null != e || (e = r.destination[r.key])), r.target && (null != e || (e = r.target[r.key])), 
      o = e;
    }
  }
  return o;
}

function _isUndefined(e) {
  return void 0 === e;
}

function _isNull(e) {
  return null === e;
}

function _isNullOrUndefined(e) {
  return null == e;
}

function _isMergeableObject(r, n, l, o) {
  var i;
  let a = null == n || null === (i = n.isMergeableObject) || void 0 === i ? void 0 : i.call(n, r, e, n, l, o);
  return null == a && (a = "boolean" == typeof (null == r ? void 0 : r[t]) ? r[t] : e(r)), 
  a;
}

function defaultArrayMerge(e, t, r, n) {
  null != n || (n = _newTmpRuntimeData([]));
  const l = n.level + 1, o = n.root, i = [];
  return n.parent[n.key] = i, e.concat(t).reduce((e, t, i) => (t = cloneUnlessOtherwiseSpecified(t, r, {
    key: i
  }, {
    level: l,
    paths: [ ...n.paths, i ],
    root: o,
    parent: e,
    key: i
  }), e[i] = t, e), i);
}

function _handleOptions(e) {
  return e || {};
}

function deepmerge(e, t, r, n) {
  const l = Array.isArray(t), o = Array.isArray(e), i = _handleOptions(r);
  var a;
  return l === o ? l ? (null !== (a = null == i ? void 0 : i.arrayMerge) && void 0 !== a ? a : defaultArrayMerge)(e, t, r, n) : function mergeObject(e, t, r, n) {
    let l = {};
    return n || (n = _newTmpRuntimeData(l)), _isMergeableObject(e, r, void 0, n) && Object.keys(e).forEach(function(o) {
      l[o] = cloneUnlessOtherwiseSpecified(e[o], r, {
        key: o,
        source: t,
        target: e,
        destination: l
      }, {
        level: n.level + 1,
        paths: [ ...n.paths, o ],
        root: n.root,
        parent: l,
        key: o
      });
    }), Object.keys(t).forEach(function(o) {
      l[o] = _isMergeableObject(t[o], r, {
        key: o,
        source: t,
        target: e
      }, n) && e[o] ? deepmerge(e[o], t[o], r, {
        level: n.level + 1,
        paths: [ ...n.paths, o ],
        root: n.root,
        parent: l,
        key: o
      }) : cloneUnlessOtherwiseSpecified(t[o], r, {
        key: o,
        source: t,
        target: e
      }, {
        level: n.level + 1,
        paths: [ ...n.paths, o ],
        root: n.root,
        parent: l,
        key: o
      });
    }), l;
  }(e, t, r, n) : cloneUnlessOtherwiseSpecified(t, r, {
    target: e,
    source: t
  }, n);
}

function isMergeable(t) {
  return e(t);
}

const t = /*#__PURE__*/ Symbol.for("SYMBOL_IS_MERGEABLE");

function _newTmpRuntimeData(e) {
  return {
    level: 0,
    paths: [],
    root: e,
    parent: e,
    key: void 0
  };
}

function deepmergeAll(e, t) {
  if (!Array.isArray(e)) throw new Error("first argument should be an array");
  return e.reduce(function(e, r) {
    return deepmerge(e, r, t);
  }, {});
}

export { t as SYMBOL_IS_MERGEABLE, _defaultCheckShouldNotUpsertValue, _handleOptions, _isMergeableObject, _isNull, _isNullOrUndefined, _isUndefined, _newTmpRuntimeData, _shouldClone, deepmergeAll as all, deepmerge, deepmergeAll, deepmerge as default, isMergeable };
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