当有人点击我打算用作某个元素的不透明度的按钮时,我启动了一个计时器。当我使用do
跟踪值时,我可以看到它向控制台吐出40次,但在视图中数字保持不变。不知道我在哪里出错:
let intent = ({ DOM }) => ({
clickLogin$: DOM.select('.sign-in').events('click').map(ev => true)
})
let model = ({ clickLogin$ }) =>
Rx.Observable.combineLatest(
clickLogin$.startWith(false),
clickLogin$.map(x =>
Rx.Observable.timer(1, 1)
).switch().startWith(0).take(40),
(signingIn, fadeValue) => ({ signingIn, fadeValue })
)
let view = (state$) => {
return state$.do(
x => console.log(x.fadeValue)) // this fires |--1-2-3-4-5-6-7-8-->
.map(({ signingIn, fadeValue }) =>
div(`.app`, [
div([fadeValue]), // this value does not change
If(signingIn,
div(`.overlay`, {
style: {
backgroundColor: `rgba(0, 0, 0, 0.${fadeValue})` // nor does this
}
})
)
])
)
}
let main = (sources) => {
let view$ = view(model(intent(sources)))
return {
DOM: view$,
history: sources.History,
Props: sources.Props,
}
}
更新:原来在hyperscript中出现一个小错误导致了它的奇怪行为。我甚至没有将它包括在我的例子中,因为我认为它不相关。
div(`content`, [ `testing` ])
只需将上述内容更改为(添加课程表示)
div(`.content`, [ `testing` ])
造成一切神奇的工作。
答案 0 :(得分:1)
这可能不是一个完整的答案,但它有助于识别问题。我删除了视图代码生成的If
部分,并添加了repeat
,将其放在tricycle中,您可以看到fadeValue
按预期顺序生成。
var Cycle = require('@cycle/core');
var CycleDOM = require('@cycle/dom');
var Rx = require('rx');
var makeDOMDriver = CycleDOM.makeDOMDriver;
var div = CycleDOM.div;
var sources = {
DOM: makeDOMDriver('.app')
};
let main = (sources) => {
let intent = ({ DOM }) => ({
clickLogin$: Rx.Observable.interval(3000).take(5).share()
})
let model = ({ clickLogin$ }) =>
Rx.Observable.combineLatest(
clickLogin$.startWith(false),
clickLogin$.flatMapLatest(function (x) {
return Rx.Observable.timer(200, 200);
}).take(10).repeat(),
(signingIn, fadeValue) => ({ signingIn, fadeValue })
)
let view = (state$) => {
return state$.do(
x => console.log(x.fadeValue)) // this fires |--1-2-3-4-5-6-7-8-->
.map(({ signingIn, fadeValue }) =>
div(`.app`, [
div([fadeValue]) // this value does not change
])
)
}
let view$ = view(model(intent(sources)))
return {
DOM: view$,
history: sources.History,
Props: sources.Props,
}
}