You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

132 lines
3.4 KiB
JavaScript

3 months ago
'use strict'
// utils is a library of generic helper functions non-specific to axios
const { toString } = Object.prototype
/**
* Determine if a value is an Array
*
* @param {Object} val The value to test
* @returns {boolean} True if value is an Array, otherwise false
*/
export function isArray(val) {
return toString.call(val) === '[object Array]'
}
/**
* Determine if a value is an Object
*
* @param {Object} val The value to test
* @returns {boolean} True if value is an Object, otherwise false
*/
export function isObject(val) {
return val !== null && typeof val === 'object'
}
/**
* Determine if a value is a Date
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a Date, otherwise false
*/
export function isDate(val) {
return toString.call(val) === '[object Date]'
}
/**
* Determine if a value is a URLSearchParams object
*
* @param {Object} val The value to test
* @returns {boolean} True if value is a URLSearchParams object, otherwise false
*/
export function isURLSearchParams(val) {
return typeof URLSearchParams !== 'undefined' && val instanceof URLSearchParams
}
/**
* Iterate over an Array or an Object invoking a function for each item.
*
* If `obj` is an Array callback will be called passing
* the value, index, and complete array for each item.
*
* If 'obj' is an Object callback will be called passing
* the value, key, and complete object for each property.
*
* @param {Object|Array} obj The object to iterate
* @param {Function} fn The callback to invoke for each item
*/
export function forEach(obj, fn) {
// Don't bother if no value provided
if (obj === null || typeof obj === 'undefined') {
return
}
// Force an array if not already something iterable
if (typeof obj !== 'object') {
/* eslint no-param-reassign:0 */
obj = [obj]
}
if (isArray(obj)) {
// Iterate over array values
for (let i = 0, l = obj.length; i < l; i++) {
fn.call(null, obj[i], i, obj)
}
} else {
// Iterate over object keys
for (const key in obj) {
if (Object.prototype.hasOwnProperty.call(obj, key)) {
fn.call(null, obj[key], key, obj)
}
}
}
}
/**
* 是否为boolean
* @param val
* @returns {boolean}
*/
export function isBoolean(val) {
return typeof val === 'boolean'
}
/**
* 是否为真正的对象{} new Object
* @param {any} obj - 检测的对象
* @returns {boolean}
*/
export function isPlainObject(obj) {
return Object.prototype.toString.call(obj) === '[object Object]'
}
/**
* Function equal to merge with the difference being that no reference
* to original objects is kept.
*
* @see merge
* @param {Object} obj1 Object to merge
* @returns {Object} Result of all merge properties
*/
export function deepMerge(/* obj1, obj2, obj3, ... */) {
const result = {}
function assignValue(val, key) {
if (typeof result[key] === 'object' && typeof val === 'object') {
result[key] = deepMerge(result[key], val)
} else if (typeof val === 'object') {
result[key] = deepMerge({}, val)
} else {
result[key] = val
}
}
for (let i = 0, l = arguments.length; i < l; i++) {
forEach(arguments[i], assignValue)
}
return result
}
export function isUndefined(val) {
return typeof val === 'undefined'
}