Babel 7和babel-polyfill

Question

更新到babel 7 beta后，看起来像babel polyfill在捆绑之前不会转换。我更新了所有范围内的包，例如“@ babel / polyfill”：“7.0.0-beta.36”。并且导入了两个文件的导入，从导入'babel-polyfill'导入'@ babel / polyfill'。如何使用babel / pollyfill与babel env和babel 7.当使用useBuiltIns时，我应该使用babel / polyfill：'usage'，带有目标吗？

.babelrc.js

conda install PIL
conda install Pillow

types.js

const nodeEnv = process.env.NODE_ENV || 'development'
let presetEnvConfig, plugins

if (nodeEnv === 'test'){
    presetEnvConfig = {targets: {node: 'current'}}
    plugins = ['istanbul']
} else {
    presetEnvConfig = {
        targets: {
            browsers: ['last 2 versions', 'ie >= 11']
        },
        modules: false
    }
    plugins = ['react-hot-loader/babel']
}

const config = {
    presets: [
        ['@babel/preset-env', presetEnvConfig],
        '@babel/react',
        '@babel/stage-2'
    ],
    plugins,
}

index.js

import keyMirror from '../../../utils/keyMirror'

export default keyMirror({
    Unassign: null,
    Reassign: null,
    QuickAssignment: null,
}, 'TagAssignmentTypes')

Answer 1

更改

  

@ babel / stage-2 to @ babel / preset-stage-2

Answer 2

@ babel / polyfill是一个包装程序包，仅包含稳定的core-js功能（在Babel 6中还包括提案）和再生器运行时/运行时的导入，这些是编译器生成器和异步函数所需的。该软件包无法提供从core-js @ 2到core-js @ 3的平滑迁移路径：为此，决定弃用@ babel / polyfill，以便单独包含核心的必需部分-js和regenerator-runtime。

代替

import "@babel/polyfill";

您应该使用这两行：

import "core-js/stable";
import "regenerator-runtime/runtime";

别忘了直接安装这些依赖项！

npm i --save core-js regenerator-runtime

Answer 3

import shutil
import sys
import subprocess as subp
import win32com.client
import pythoncom
from datetime import datetime
import os
import time

def do_powerpoint(filename):
   """run external copy of self to do powerpoint stuff"""
   # sys.executable is the python.exe you are using, __file__ is the
   # path to this module's source and filename you pass in
   return subp.call([sys.executable, __file__, filename])

def _do_powerpoint(filename):
    try:
        rundate = "Quote_{:%d%m%Y_%H%M%S%f}".format(datetime.now())
        pythoncom.CoInitialize()
        APPLICATION = win32com.client.DispatchEx("PowerPoint.Application")
        APPLICATION.Visible = True # I think False is better so you dont see it pop up
        path_ppt = shutil.copy(filename, "D:/{0}.pptx".format(rundate))
        PRESENTATION = APPLICATION.Presentations.Open(path_ppt)
        Slide1 = PRESENTATION.Slides(1)
        Shape1 = Slide1.Shapes(1)
        print(Shape1.AlternativeText)
        for shape in Slide1.Shapes:
            if shape.HasTextFrame:
                shape.TextFrame.TextRange.Replace(FindWhat="#abc",ReplaceWhat="THAILAND", WholeWords=False)
            if shape.AlternativeText == "1":
                shape.Fill.UserPicture("D:/1.jpg")
            if shape.AlternativeText == "2":
                shape.Fill.UserPicture("D:/2.jpg")
            if shape.AlternativeText == "3":
                shape.Fill.UserPicture("D:/3.jpg")
        PATH_TO_PDF = "{0}{1}{2}".format(r'd:/',rundate,'.pdf')
        PRESENTATION.SaveAs(PATH_TO_PDF, 32)
        '''if I remove below 4 lines, it works fine 
and converts all pptx to pdf, but all instances of 
powerpoint remain open and copies arent deleted, eating system resources'''
        PRESENTATION.Close() 
        APPLICATION.Quit()
        PRESENTATION = None
        APPLICATION = None
        os.remove(path_ppt)
        return True
    except Exception:
        return False

if __name__ == "__main__":
    _do_powerpoint(sys.argv[1]) # will raise error if no parameters