Last change
on this file since 6a80231 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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File size:
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[6a3a178] | 1 | 'use strict';
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| 2 |
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| 3 | var isExtendable = require('is-extendable');
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| 4 | var forIn = require('for-in');
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| 5 |
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| 6 | function mixinDeep(target, objects) {
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| 7 | var len = arguments.length, i = 0;
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| 8 | while (++i < len) {
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| 9 | var obj = arguments[i];
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| 10 | if (isObject(obj)) {
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| 11 | forIn(obj, copy, target);
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| 12 | }
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| 13 | }
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| 14 | return target;
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| 15 | }
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| 16 |
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| 17 | /**
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| 18 | * Copy properties from the source object to the
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| 19 | * target object.
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| 20 | *
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| 21 | * @param {*} `val`
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| 22 | * @param {String} `key`
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| 23 | */
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| 24 |
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| 25 | function copy(val, key) {
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| 26 | if (!isValidKey(key)) {
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| 27 | return;
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| 28 | }
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| 29 |
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| 30 | var obj = this[key];
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| 31 | if (isObject(val) && isObject(obj)) {
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| 32 | mixinDeep(obj, val);
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| 33 | } else {
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| 34 | this[key] = val;
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| 35 | }
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| 36 | }
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| 37 |
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| 38 | /**
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| 39 | * Returns true if `val` is an object or function.
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| 40 | *
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| 41 | * @param {any} val
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| 42 | * @return {Boolean}
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| 43 | */
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| 44 |
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| 45 | function isObject(val) {
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| 46 | return isExtendable(val) && !Array.isArray(val);
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| 47 | }
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| 48 |
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| 49 | /**
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| 50 | * Returns true if `key` is a valid key to use when extending objects.
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| 51 | *
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| 52 | * @param {String} `key`
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| 53 | * @return {Boolean}
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| 54 | */
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| 55 |
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| 56 | function isValidKey(key) {
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| 57 | return key !== '__proto__' && key !== 'constructor' && key !== 'prototype';
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| 58 | };
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| 59 |
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| 60 | /**
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| 61 | * Expose `mixinDeep`
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| 62 | */
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| 63 |
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| 64 | module.exports = mixinDeep;
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