MessagesForMacintosh/JS/node_modules/apollo-utilities/lib/util/cloneDeep.js

34 lines
1.1 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var toString = Object.prototype.toString;
function cloneDeep(value) {
return cloneDeepHelper(value, new Map());
}
exports.cloneDeep = cloneDeep;
function cloneDeepHelper(val, seen) {
switch (toString.call(val)) {
case "[object Array]": {
if (seen.has(val))
return seen.get(val);
var copy_1 = val.slice(0);
seen.set(val, copy_1);
copy_1.forEach(function (child, i) {
copy_1[i] = cloneDeepHelper(child, seen);
});
return copy_1;
}
case "[object Object]": {
if (seen.has(val))
return seen.get(val);
var copy_2 = Object.create(Object.getPrototypeOf(val));
seen.set(val, copy_2);
Object.keys(val).forEach(function (key) {
copy_2[key] = cloneDeepHelper(val[key], seen);
});
return copy_2;
}
default:
return val;
}
}
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