@uifabric/utilities
Version:
Fluent UI React utilities for building components.
49 lines • 1.91 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Simple deep merge function. Takes all arguments and returns a deep copy of the objects merged
* together in the order provided. If an object creates a circular reference, it will assign the
* original reference.
*/
function merge(target) {
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {
var arg = args_1[_a];
_merge(target || {}, arg);
}
return target;
}
exports.merge = merge;
/**
* The _merge helper iterates through all props on source and assigns them to target.
* When the value is an object, we will create a deep clone of the object. However if
* there is a circular reference, the value will not be deep cloned and will persist
* the reference.
*/
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function _merge(target, source, circularReferences) {
if (circularReferences === void 0) { circularReferences = []; }
circularReferences.push(source);
for (var name_1 in source) {
if (source.hasOwnProperty(name_1)) {
if (name_1 !== '__proto__' && name_1 !== 'constructor' && name_1 !== 'prototype') {
var value = source[name_1];
if (typeof value === 'object' && value !== null && !Array.isArray(value)) {
var isCircularReference = circularReferences.indexOf(value) > -1;
target[name_1] = (isCircularReference
? value
: _merge(target[name_1] || {}, value, circularReferences));
}
else {
target[name_1] = value;
}
}
}
}
circularReferences.pop();
return target;
}
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