@ace-util/core/esm/types.js

Utils.

/**
 * check if value is null
 * @param val value
 * @returns true/false
 */
export function isNull(val) {
    return val === null;
}
/**
 * check if value is undefined
 * @param val value
 * @returns true/false
 */
export function isUndefined(val) {
    return typeof val === 'undefined';
}
/**
 * alias to isUndefined
 * @deprecated Use `isUndefined` instead. This alias may cause confusion due to inconsistent naming conventions.
 * @param val value
 * @returns true/false
 */
export var isUndef = isUndefined;
/**
 * check if value is a array
 * @param val value
 * @returns true/false
 */
export function isArray(val) {
    return Array.isArray(val);
}
/**
 * check if value is an object
 * @param val value
 * @returns true/false
 */
export function isObject(val) {
    return val !== null && typeof val === 'object';
}
var toString = function (x) { return Object.prototype.toString.call(x); };
/**
 * check if value is a plain object
 * @param val value
 * @returns true/false
 */
export function isPlainObject(val) {
    return toString(val) === '[object Object]';
}
/**
 * check if value is a date
 * @param val value
 * @returns true/false
 */
export function isDate(val) {
    return toString(val) === '[object Date]';
}
/**
 * check if value is a function
 * @param val value
 * @returns true/false
 */
export function isFunction(val) {
    return typeof val === 'function';
}
/**
 * Inlined Object.is polyfill.
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
 */
export function objectIs(x, y) {
    if (x === y) {
        return x !== 0 || 1 / x === 1 / y;
    }
    // eslint-disable-next-line
    return x !== x && y !== y;
}
/**
 * check if value is primitive
 * https://developer.mozilla.org/en-US/docs/Glossary/Primitive
 * @param val value
 * @returns true/false
 */
export function isPrimitive(val) {
    return (typeof val === 'string' ||
        typeof val === 'number' ||
        typeof val === 'symbol' ||
        typeof val === 'boolean' ||
        typeof val === 'bigint' ||
        typeof val === 'undefined' ||
        val === null);
}
/**
 * compare two values are fully equal
 * @param x value x
 * @param y value y
 * @returns true/false
 */
export function equals(x, y) {
    var f1 = x instanceof Object;
    var f2 = y instanceof Object;
    if (!f1 || !f2) {
        return x === y;
    }
    if (Object.keys(x).length !== Object.keys(y).length) {
        return false;
    }
    var newX = Object.keys(x);
    for (var p in newX) {
        p = newX[p];
        var a = x[p] instanceof Object;
        var b = y[p] instanceof Object;
        if ((a && b && !equals(x[p], y[p])) || (!(a && b) && x[p] !== y[p])) {
            return false;
        }
    }
    return true;
}
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