如何在更新事件发生时在webpack监视模式下添加前导钩和后挂钩？

我不敢相信我发现了这一点.这正是我想要的.祝好运.

var ProgressHook = new webpack.ProgressPlugin(function(percentage, msg) {
    if (percentage==0){
        // pre-hook code (before webpack compiles )
    } else if (percentage==1){
        // post-hook code (after webpack compiles )  
    } 
})