69 lines
1.3 KiB
JavaScript
69 lines
1.3 KiB
JavaScript
'use strict';
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var isObj = require('is-obj');
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var hasOwnProperty = Object.prototype.hasOwnProperty;
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var propIsEnumerable = Object.prototype.propertyIsEnumerable;
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function toObject(val) {
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if (val === null || val === undefined) {
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throw new TypeError('Sources cannot be null or undefined');
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}
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return Object(val);
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}
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function assignKey(to, from, key) {
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var val = from[key];
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if (val === undefined || val === null) {
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return;
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}
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if (hasOwnProperty.call(to, key)) {
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if (to[key] === undefined || to[key] === null) {
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throw new TypeError('Cannot convert undefined or null to object (' + key + ')');
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}
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}
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if (!hasOwnProperty.call(to, key) || !isObj(val)) {
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to[key] = val;
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} else {
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to[key] = assign(Object(to[key]), from[key]);
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}
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}
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function assign(to, from) {
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if (to === from) {
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return to;
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}
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from = Object(from);
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for (var key in from) {
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if (hasOwnProperty.call(from, key)) {
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assignKey(to, from, key);
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}
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}
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if (Object.getOwnPropertySymbols) {
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var symbols = Object.getOwnPropertySymbols(from);
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for (var i = 0; i < symbols.length; i++) {
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if (propIsEnumerable.call(from, symbols[i])) {
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assignKey(to, from, symbols[i]);
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}
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}
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}
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return to;
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}
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module.exports = function deepAssign(target) {
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target = toObject(target);
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for (var s = 1; s < arguments.length; s++) {
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assign(target, arguments[s]);
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}
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return target;
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};
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