mtl-js-sdk/lib/common/builder.js

ynf-fw-mtl-api

import utils from './utils'

/**
 * 重载 obj[key] 的 getter 使其返回 value
 */
function clobber(obj, key, value) {
    let needsProperty = false;
    try {
        obj[key] = value;
    } catch (e) {
        needsProperty = true;
    }
    if (needsProperty || obj[key] !== value) {
        utils.defineGetter(obj, key, function () {
            return value;
        });
    }
}

/**
 * 递归合并 src 的属性到 target 中，target 中已存在的属性会被覆盖。
 */
function recursiveMerge(target, src) {
    for (let prop in src) {
        if (src?.hasOwnProperty(prop)) {
            if (target.prototype && target.prototype.constructor === target) {
                clobber(target.prototype, prop, src[prop]);
            } else {
                if (typeof src[prop] === 'object' && typeof target[prop] === 'object') {
                    recursiveMerge(target[prop], src[prop]);
                } else {
                    clobber(target, prop, src[prop]);
                }
            }
        }
    }
}

let builder = {};
builder.recursiveMerge = recursiveMerge;
builder.assignGetter = clobber;
export default builder;