You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
133 lines
3.9 KiB
133 lines
3.9 KiB
'use strict'; |
|
|
|
var isMergeableObject = function isMergeableObject(value) { |
|
return isNonNullObject(value) |
|
&& !isSpecial(value) |
|
}; |
|
|
|
function isNonNullObject(value) { |
|
return !!value && typeof value === 'object' |
|
} |
|
|
|
function isSpecial(value) { |
|
var stringValue = Object.prototype.toString.call(value); |
|
|
|
return stringValue === '[object RegExp]' |
|
|| stringValue === '[object Date]' |
|
|| isReactElement(value) |
|
} |
|
|
|
// see https://github.com/facebook/react/blob/b5ac963fb791d1298e7f396236383bc955f916c1/src/isomorphic/classic/element/ReactElement.js#L21-L25 |
|
var canUseSymbol = typeof Symbol === 'function' && Symbol.for; |
|
var REACT_ELEMENT_TYPE = canUseSymbol ? Symbol.for('react.element') : 0xeac7; |
|
|
|
function isReactElement(value) { |
|
return value.$$typeof === REACT_ELEMENT_TYPE |
|
} |
|
|
|
function emptyTarget(val) { |
|
return Array.isArray(val) ? [] : {} |
|
} |
|
|
|
function cloneUnlessOtherwiseSpecified(value, options) { |
|
return (options.clone !== false && options.isMergeableObject(value)) |
|
? deepmerge(emptyTarget(value), value, options) |
|
: value |
|
} |
|
|
|
function defaultArrayMerge(target, source, options) { |
|
return target.concat(source).map(function(element) { |
|
return cloneUnlessOtherwiseSpecified(element, options) |
|
}) |
|
} |
|
|
|
function getMergeFunction(key, options) { |
|
if (!options.customMerge) { |
|
return deepmerge |
|
} |
|
var customMerge = options.customMerge(key); |
|
return typeof customMerge === 'function' ? customMerge : deepmerge |
|
} |
|
|
|
function getEnumerableOwnPropertySymbols(target) { |
|
return Object.getOwnPropertySymbols |
|
? Object.getOwnPropertySymbols(target).filter(function(symbol) { |
|
return target.propertyIsEnumerable(symbol) |
|
}) |
|
: [] |
|
} |
|
|
|
function getKeys(target) { |
|
return Object.keys(target).concat(getEnumerableOwnPropertySymbols(target)) |
|
} |
|
|
|
function propertyIsOnObject(object, property) { |
|
try { |
|
return property in object |
|
} catch(_) { |
|
return false |
|
} |
|
} |
|
|
|
// Protects from prototype poisoning and unexpected merging up the prototype chain. |
|
function propertyIsUnsafe(target, key) { |
|
return propertyIsOnObject(target, key) // Properties are safe to merge if they don't exist in the target yet, |
|
&& !(Object.hasOwnProperty.call(target, key) // unsafe if they exist up the prototype chain, |
|
&& Object.propertyIsEnumerable.call(target, key)) // and also unsafe if they're nonenumerable. |
|
} |
|
|
|
function mergeObject(target, source, options) { |
|
var destination = {}; |
|
if (options.isMergeableObject(target)) { |
|
getKeys(target).forEach(function(key) { |
|
destination[key] = cloneUnlessOtherwiseSpecified(target[key], options); |
|
}); |
|
} |
|
getKeys(source).forEach(function(key) { |
|
if (propertyIsUnsafe(target, key)) { |
|
return |
|
} |
|
|
|
if (propertyIsOnObject(target, key) && options.isMergeableObject(source[key])) { |
|
destination[key] = getMergeFunction(key, options)(target[key], source[key], options); |
|
} else { |
|
destination[key] = cloneUnlessOtherwiseSpecified(source[key], options); |
|
} |
|
}); |
|
return destination |
|
} |
|
|
|
function deepmerge(target, source, options) { |
|
options = options || {}; |
|
options.arrayMerge = options.arrayMerge || defaultArrayMerge; |
|
options.isMergeableObject = options.isMergeableObject || isMergeableObject; |
|
// cloneUnlessOtherwiseSpecified is added to `options` so that custom arrayMerge() |
|
// implementations can use it. The caller may not replace it. |
|
options.cloneUnlessOtherwiseSpecified = cloneUnlessOtherwiseSpecified; |
|
|
|
var sourceIsArray = Array.isArray(source); |
|
var targetIsArray = Array.isArray(target); |
|
var sourceAndTargetTypesMatch = sourceIsArray === targetIsArray; |
|
|
|
if (!sourceAndTargetTypesMatch) { |
|
return cloneUnlessOtherwiseSpecified(source, options) |
|
} else if (sourceIsArray) { |
|
return options.arrayMerge(target, source, options) |
|
} else { |
|
return mergeObject(target, source, options) |
|
} |
|
} |
|
|
|
deepmerge.all = function deepmergeAll(array, options) { |
|
if (!Array.isArray(array)) { |
|
throw new Error('first argument should be an array') |
|
} |
|
|
|
return array.reduce(function(prev, next) { |
|
return deepmerge(prev, next, options) |
|
}, {}) |
|
}; |
|
|
|
var deepmerge_1 = deepmerge; |
|
|
|
module.exports = deepmerge_1;
|
|
|