jsketcher/web/test/utils/deep-merge.js
2017-02-03 00:13:49 -08:00

26 lines
No EOL
649 B
JavaScript

export function isObject(item) {
return (item && typeof item === 'object' && !Array.isArray(item));
}
/**
* Deep merge two objects.
* @param target
* @param ...sources
*/
export function deepMerge(target, ...sources) {
if (!sources.length) return target;
const source = sources.shift();
if (isObject(target) && isObject(source)) {
for (let key in source) {
if (isObject(source[key])) {
if (!target[key]) Object.assign(target, { [key]: {} });
deepMerge(target[key], source[key]);
} else {
Object.assign(target, { [key]: source[key] });
}
}
}
return deepMerge(target, ...sources);
}