webpack flex兼容低版本

@postcss.config.js
/**

• @file postcss 配置
  */

module.exports = {
plugins: {
'autoprefixer': {browsers: [
'ios >= 6',
'last 5 version'
]}
}
};

@.babelrc
{
"presets": [
[
"env",
{
"modules": false,
"targets": {
"browsers": [
"ios >= 6",
"> 1%",
"last 2 versions",
"not ie <= 8"
]
}
}
],
"stage-2"
],
"plugins": [
"transform-vue-jsx",
"transform-runtime"
]
}