iscroll-react
v1.0.3
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Encapsulating iScroll as a react component
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React-IScroll
Encapsulating iScroll as a react component
iScroll
iScroll is a high performance, small footprint, dependency free, multi-platform javascript scroller.
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
React-IScroll
Since iScroll doesn't provide React version, I found it's very inconvenient to make iScroll work with React. So I decided to write a React component encapsulating iScroll.
How to Use
Install from npm:
npm i iscroll-react
Use React-IScroll in your project:
import IScroll from "iscroll-react"
import React, { Component } from 'react'
import iscroll from "iscroll"
class SomeComponent extends Component {
render() {
return <IScroll iScroll={iscroll}>
These contents can be scrolled.
</IScroll>
}
}
Props
You can provide props for React-IScroll to use some features.
iScroll
Required, iScroll library, see here for different versions of iScroll. Remember that if you use pull-down-to-refresh feature, please provide
iscroll-probe.js
.options
iScroll options, see here for all options. It's directly provided to iScroll. Note that if you are using pull-down-to-refresh feature, options will be appended an attribute:
probeType: 2
Since you may use React-IScroll many times in your project, setting iScroll options many times would be redundant. To simplify this, I added a
setDefaultIScrollOptions
function. Initialized once, iScroll will copy the default props on construct.import {setDefaultIScrollOptions} from "iscroll-react" setDefaultIScrollOptions({ scrollbars: true, mouseWheel: true, shrinkScrollbars: "scale", fadeScrollbars: true, click: true, })
iScroll events
iScroll itself provide some custom events, here I just wrapped them. All below events will be called with the iScroll instance, e.g.
onBeforeScrollStart(iScrollInstance)
, you can do whatever like reading iScroll properties or calling functions.onBeforeScrollStart
<=beforeScrollStart
onScrollCancel
<=scrollCancel
onScrollStart
<=scrollStart
onScroll
<=scroll
onScrollEnd
<=scrollEnd
onFlick
<=flick
onZoomStart
<=zoomStart
onZoomEnd
<=zoomEnd
alwaysScroll
By setting this value to true, the scroller can be scrolled even the scroller's height is smaller than the wrappers. Default is
true
.dynamicTop
Calculate the wrapper's top dynamically. Default is
false
.dynamicBottomFunc
Calculate the wrapper's bottom dynamically, since we can't use the wrapper's height for calculation, so I exposed a function.
Notes: because React-IScroll is mounted before the parent, if you want to use this feature, make sure to call
updateIScroll()
when the parent is mounted.wrapperStyle
If your wrapper's position is static, using this option the fast set wrapper's CSS attributes:
top
,bottom
,left
andright
. If not specified, all will be0
.Note that
top
andbottom
might be override bydynamicTop
anddynamicBottomFunc
.pullDownToRefresh
If you want to use pull-down-to-refresh feature, set this value. This option has sub props:
labelInactive
Node showed when scroller is pulled down but not active. You can provide either your React Component or simply a string.
labelActive
Node showed when pulldown is active. Provide either a React Component or string.
appearDistance
If scroller's pull-down distance exceeds this value,
labelInactive
will be showed. Default is20
.activeDistance
If scroller's pull-down distance exceeds this value,
labelActive
will be showed. Default is55
.Notes: if you have set the page's viewport, the above two values should be adjusted to get best experience.
onRefresh
Required, When touch is released, this function will be called if the pulldown is active.
Functions
IScroll.updateIScroll
Update iScroll by calling
iScrollInstance.refresh()
and calculate wrapper's positions. Since React-IScroll don't know children updated or not, you might need to call this function manually, e.g. on async data loaded, or on children's state changed.import IScroll from "iscroll-react" import React, { Component } from 'react' import iscroll from "iscroll" class SomeComponent extends Component { componentDidUpdate() { if (this.refs.iscroll) { this.refs.iscroll.updateIScroll() } } render() { return <IScroll iScroll={iscroll} ref="iscroll"> These contents can be scrolled. </IScroll> } }
IScroll.iScrollInstance
Used to get the iScroll instance, if initialized.
setDefaultIScrollOptions
As is explained above, it's used to set iScroll's default options.
Examples
Clone this repo and run npm run examples
, then navigate to http://localhost:8080/ to see examples.
- Basic Scroll
- Always Scroll
- Dynamic Top
- Dynamic Bottom
- Scroller's Height Changes
- Async Request & Pull Down to Refresh