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 cloneIfNecessary(value, optionsArgument) {
|
var clone = optionsArgument && optionsArgument.clone === true;
|
return (clone && isMergeableObject(value)) ? deepmerge(emptyTarget(value), value, optionsArgument) : value
|
}
|
|
function defaultArrayMerge(target, source, optionsArgument) {
|
var destination = target.slice();
|
source.forEach(function(e, i) {
|
if (typeof destination[i] === 'undefined') {
|
destination[i] = cloneIfNecessary(e, optionsArgument);
|
} else if (isMergeableObject(e)) {
|
destination[i] = deepmerge(target[i], e, optionsArgument);
|
} else if (target.indexOf(e) === -1) {
|
destination.push(cloneIfNecessary(e, optionsArgument));
|
}
|
});
|
return destination
|
}
|
|
function mergeObject(target, source, optionsArgument) {
|
var destination = {};
|
if (isMergeableObject(target)) {
|
Object.keys(target).forEach(function(key) {
|
destination[key] = cloneIfNecessary(target[key], optionsArgument);
|
});
|
}
|
Object.keys(source).forEach(function(key) {
|
if (!isMergeableObject(source[key]) || !target[key]) {
|
destination[key] = cloneIfNecessary(source[key], optionsArgument);
|
} else {
|
destination[key] = deepmerge(target[key], source[key], optionsArgument);
|
}
|
});
|
return destination
|
}
|
|
function deepmerge(target, source, optionsArgument) {
|
var sourceIsArray = Array.isArray(source);
|
var targetIsArray = Array.isArray(target);
|
var options = optionsArgument || { arrayMerge: defaultArrayMerge };
|
var sourceAndTargetTypesMatch = sourceIsArray === targetIsArray;
|
|
if (!sourceAndTargetTypesMatch) {
|
return cloneIfNecessary(source, optionsArgument)
|
} else if (sourceIsArray) {
|
var arrayMerge = options.arrayMerge || defaultArrayMerge;
|
return arrayMerge(target, source, optionsArgument)
|
} else {
|
return mergeObject(target, source, optionsArgument)
|
}
|
}
|
|
deepmerge.all = function deepmergeAll(array, optionsArgument) {
|
if (!Array.isArray(array) || array.length < 2) {
|
throw new Error('first argument should be an array with at least two elements')
|
}
|
|
// we are sure there are at least 2 values, so it is safe to have no initial value
|
return array.reduce(function(prev, next) {
|
return deepmerge(prev, next, optionsArgument)
|
})
|
};
|
|
var deepmerge_1 = deepmerge;
|
|
export default deepmerge_1;
|
