isBatchingUpdates

    2. class List extends React.PureComponent {
    3.     constructor (props) {}
    5.   render () {}
    7.   onChange = () => {
    8.         // 开始，处于 batchUpdate
    9.     // isBatchingUpdates = true
    11.     // 其他操作
    12.     setTimeout(() => {
    13.       // 此时的 isBatchUpdates = false
    14.         this.setState({
    15.           number: this.state.number + 1
    16.       })
    17.     })
    19.     // 结束 isBatchingUpdates = false
    20.   }
    22. }
    25. // transaction 面向切片编程
    26. transaction.initialize = function () { console.log('init') }
    28. transaction.close = function () { console.log('close') }
    30. function fn() { console.log('todo anything') }
    32. transcation.perform(fn)