promise-loading-spinner
v3.3.2
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Advanced handling of loaders/spinners based on one or multiple Promises
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promise-loading-spinner
Advanced handling of loaders/spinners based on one or multiple Promises.
Why?
- Show a spinner using a promise Spinner will disappear when promise is resolved
- No Spinner for short operations Spinner won't show up for short operations so operation doesn't feel lazy
- Support of multiple promises Spinner will disappear when the last unresolved promise is resolved
- Operations in a sequence If there are multiple operations in a sequence the spinner will disappear when the last operation is finished
See this Codepen.
Install
$ yarn add promise-loading-spinner
Usage
This shows loading spinners based on promises.
import PromiseLoadingSpinner from 'promise-loading-spinner'
const loader = new PromiseLoadingSpinner({
// options
})
// ...
const myPromise = new Promise((resolve) => {
setTimeout(() => {
resolve('done')
}, 5000)
})
loader.loader(myPromise)
You can also use a wrapper function for a function that returns a promise or uses await
:
const myFunction = loader.wrapFunction(async (url) => {
const response = await fetch(url)
const result = await response.json()
return result
})
myFunction(someUrl)
It also exports a method decorator:
const loaderDecorator = loader.decorator.bind(loader)
class MyClass {
@loaderDecorator()
async foo() {
// ...
}
}
All ways to add a promise can also take a configuration object as an optional parameter.
Option | Description | Type
--------|-------------|------
skipDelays
| Skip all delays (initDelay
, delay
) | boolean
Examples:
// loader
loader(promise, { skipDelays: true })
// wrapFunction:
wrapFunction(fnc, { skipDelays: true })
// decorator:
class MyClass {
@loaderDecorator({ skipDelays: true })
async foo() {
// ...
}
}
Options
Option | Description | Type | Default
--------|-------------|------|--------
delay
| Time (ms) until spinner will show up to handle short operations without a spinner | Number
| 300
closeDelay
| Time (ms) to wait until last promise is resolved to enable multiple operations in a sequence without a "flickering" spinner | Number
| 10
initDelay
| Delay (ms) after loader initialization to suppress spinners on page load | Number
| 1000
loaderElement
| the element which represents the spinner | string
(selector) or HTMLElement
| js-page-loader
classActive
| class name used to show the spinner | string
| is-active
License
MIT © 2023 Jens Simon