assign 对象合并

assign.js

export const assign = Object.assign || function (target, ...args) {
    target = Object(target);
    for (let i = 0; i < args.length; i++) {
        const source = args[i];
        if (source !== null) {
            for (const key in source) {
                if (hasOwn(source, key)) {
                    target[key] = source[key];
                }
            }
        }
    }
    return target;
};