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utils.js
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utils.js
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const arr = []
const each = arr.forEach
const slice = arr.slice
export function defaults (obj) {
each.call(slice.call(arguments, 1), (source) => {
if (source) {
for (const prop in source) {
if (obj[prop] === undefined) obj[prop] = source[prop]
}
}
})
return obj
}
export function hasXMLHttpRequest () {
return (typeof XMLHttpRequest === 'function' || typeof XMLHttpRequest === 'object')
}
/**
* Determine whether the given `maybePromise` is a Promise.
*
* @param {*} maybePromise
*
* @returns {Boolean}
*/
function isPromise (maybePromise) {
return !!maybePromise && typeof maybePromise.then === 'function'
}
/**
* Convert any value to a Promise than will resolve to this value.
*
* @param {*} maybePromise
*
* @returns {Promise}
*/
export function makePromise (maybePromise) {
if (isPromise(maybePromise)) {
return maybePromise
}
return Promise.resolve(maybePromise)
}