Status signal component

about

The state data is encapsulated into a signal component. When the state data changes, the redirect component is automatically rendered.

interface SignalComponentType<State extends Dict>{
    // 指定状态数据路径
    (selector: string):React.ReactNode   
    // 返回状态数据的函数
    (selector: (state:ComputedState<State>)=>React.ReactNode):React.ReactNode 
}

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You only need to specify the path of the status digital library or provide a function that returns the status data.

Synchronous signal component

use $ ('<State Path>') will Status data is directly encapsulated as signal components when the status data changes, the re -rendering of the signal component is automatically triggered.

Note

Be updated Age at the same time, the entire color block will not change to re -renders.

Combination synchronous signal component

use $((state)=>{.....}) the combination of multiple status data is created as a signal component. When the dependent state data changes, the signal component will automatically trigger re -rendering.

Asynchronous computing signal component

Use $ ('<State Path>') will Status data is directly encapsulated as signal components at this time, if the status data is an asynchronous data object AsyncComputedValue at that time, the object contains loading,error,value properties.

• When the path specifies an asynchronous computing attribute, the signal component created will automatically add value property. Therefore, the above $('order.total') and $('order.total.value') it's equivalent.

Note

• $('order.count') and $('order.total.value') it is equivalent. When creating a signal component, if the target is found AsyncComputedValue automatically add value.
• You may have noticed that the rendering color block components on the current page will not change. This is the charm of the fine particle -level update of the signal component. When the state changes, the rendering of the component is limited inside the signal component.