vue-form-check/check-method.js

表单验证

/**
 * @file 表单验证
 * @author donghongyan
 */

// 基本类型判断非空
const isDefined = value => typeof value !== 'undefined';

const isNull = value => value === null;

const isBoolean = value => typeof value === 'boolean';

const isNumber = value => typeof value === 'number' && !isNaN(value);

const isArray = value => Array.isArray(value);

const isString = value => typeof value === 'string';

const isRegExp = value => typeof value === 'object' && `${value.constructor}` === 'function RegExp() { [native code] }';

const isObject = value => typeof value === 'object' && value !== null && !isArray(value) && !isRegExp(value);

// 回调会用到
const isFunction = value => typeof value === 'function';

// 非空函数判断
function isEmpty(value) {

    if (isNull(value) || !isDefined(value)
        || (isNumber(value) && [Infinity, -Infinity].includes(value))
        || (isFunction(value) && value.toString() === new Function().toString())) {
        return true;
    }

    // 主要是判断数组和字符串
    if (isArray(value) || isString(value)) {
        return value.length === 0;
    }

    if (isNumber(value) || isBoolean(value) || isFunction(value) || isRegExp(value)) {
        return false;
    }

    // 不包含原型上的keys
    return Object.keys(value).length === 0;
}

export default {
    isDefined,
    isNull,
    isBoolean,
    isNumber,
    isArray,
    isString,
    isRegExp,
    isObject,
    isFunction,
    isEmpty
};