@opentelemetry/core
Version:
OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.
157 lines • 4.48 kB
JavaScript
;
/*
* Copyright The OpenTelemetry Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.isPlainObject = void 0;
/* eslint-disable @typescript-eslint/no-explicit-any */
/**
* based on lodash in order to support esm builds without esModuleInterop.
* lodash is using MIT License.
**/
const objectTag = '[object Object]';
const nullTag = '[object Null]';
const undefinedTag = '[object Undefined]';
const funcProto = Function.prototype;
const funcToString = funcProto.toString;
const objectCtorString = funcToString.call(Object);
const getPrototypeOf = Object.getPrototypeOf;
const objectProto = Object.prototype;
const hasOwnProperty = objectProto.hasOwnProperty;
const symToStringTag = Symbol ? Symbol.toStringTag : undefined;
const nativeObjectToString = objectProto.toString;
/**
* Checks if `value` is a plain object, that is, an object created by the
* `Object` constructor or one with a `[[Prototype]]` of `null`.
*
* @static
* @memberOf _
* @since 0.8.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
* @example
*
* function Foo() {
* this.a = 1;
* }
*
* _.isPlainObject(new Foo);
* // => false
*
* _.isPlainObject([1, 2, 3]);
* // => false
*
* _.isPlainObject({ 'x': 0, 'y': 0 });
* // => true
*
* _.isPlainObject(Object.create(null));
* // => true
*/
function isPlainObject(value) {
if (!isObjectLike(value) || baseGetTag(value) !== objectTag) {
return false;
}
const proto = getPrototypeOf(value);
if (proto === null) {
return true;
}
const Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
return (typeof Ctor == 'function' &&
Ctor instanceof Ctor &&
funcToString.call(Ctor) === objectCtorString);
}
exports.isPlainObject = isPlainObject;
/**
* Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object".
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example
*
* _.isObjectLike({});
* // => true
*
* _.isObjectLike([1, 2, 3]);
* // => true
*
* _.isObjectLike(_.noop);
* // => false
*
* _.isObjectLike(null);
* // => false
*/
function isObjectLike(value) {
return value != null && typeof value == 'object';
}
/**
* The base implementation of `getTag` without fallbacks for buggy environments.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
function baseGetTag(value) {
if (value == null) {
return value === undefined ? undefinedTag : nullTag;
}
return symToStringTag && symToStringTag in Object(value)
? getRawTag(value)
: objectToString(value);
}
/**
* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the raw `toStringTag`.
*/
function getRawTag(value) {
const isOwn = hasOwnProperty.call(value, symToStringTag), tag = value[symToStringTag];
let unmasked = false;
try {
value[symToStringTag] = undefined;
unmasked = true;
}
catch (e) {
// silence
}
const result = nativeObjectToString.call(value);
if (unmasked) {
if (isOwn) {
value[symToStringTag] = tag;
}
else {
delete value[symToStringTag];
}
}
return result;
}
/**
* Converts `value` to a string using `Object.prototype.toString`.
*
* @private
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
*/
function objectToString(value) {
return nativeObjectToString.call(value);
}
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