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