Method valid

mini_program/common/Validate.js:71–80

(value, param)

			 */
			required: {
				valid(value, param) {
					if (!that.depend(param)) {
						return 'dependency-mismatch'
					} else if (typeof value === 'number') {
						value = value.toString()
					} else if (typeof value === 'boolean') {
						return !0
					}
					return value.length > 0
				},
				message(param) {
					return param.message || '这是必填字段。';
				}