sveaflet/dist/utils/equal.js

Sveaflet = Svelte + Leaflet

function getType(value) {
    return Object.prototype.toString.call(value);
}
export function isNil(value) {
    return value === undefined || value === null || value === '';
}
export function isObject(value) {
    return getType(value) === '[object Object]';
}
export function isArrayEqual(prevArr, curArr) {
    if (prevArr.length !== curArr.length) {
        return false;
    }
    return curArr.every((element) => prevArr.includes(element));
}
export function isObjectEqual(prevObj, curObj) {
    if (prevObj === curObj) {
        return true;
    }
    // 检查两个对象是否为对象，并且不为 null
    if (typeof prevObj !== 'object' ||
        prevObj === null ||
        typeof curObj !== 'object' ||
        curObj === null) {
        return false;
    }
    // 获取对象的键列表
    const prevKeys = Object.keys(prevObj);
    const curKeys = Object.keys(curObj);
    // 检查键的数量是否相同
    if (prevKeys.length !== curKeys.length) {
        return false;
    }
    // 遍历键列表，比较键和键值是否相等
    for (const key of prevKeys) {
        if (!curKeys.includes(key) || !isObjectEqual(prevObj[key], curObj[key])) {
            return false;
        }
    }
    return true;
}
export function isPrimitiveEqual(prevVal, curVal) {
    if (getType(prevVal) !== getType(curVal)) {
        return false;
    }
    else {
        return prevVal === curVal;
    }
}
export function isFunction(func) {
    return (typeof func === 'function' && typeof func.constructor === 'function' && func instanceof Function);
}