[React Error]: Target container is not a DOM element

webpack在后端对React组件进行渲染的时候，浏览器控制台报错：

compose.js:822 Uncaught Invariant Violation: _registerComponent(...): Target container is not a DOM element.

我很奇怪，webpack可以正常将我的React组件使用babel转换，我的组件代码如下：

import React from 'react'
import ReactDOM from 'react-dom'
import './compose.less'

class App extends React.Component {
  render() {
    return (
      
"compose-font">
        Little Bitch
      
    )
  }
}
ReactDOM.render(, document.getElementById('test-react-1'));

webpack.config.js

module.exports = {
  entry: './public/components/module_compose/compose.js',
  output: {
    path: path.resolve(__dirname, "./public/static_published/v1/js/"),
    filename: 'compose.js'
  },
  module: {
    loaders: [
      {test: /\.jsx?$/, loader: 'babel', exclude: /node_modules/},
      {test: /\.less$/, loader: 'style-loader!css-loader!less-loader'}
    ]
  }

出现此错误的原因是我将webpack生成的js文件放在了head，此时DOM还没有建立完毕，因此出现 not a DOM element 的错误，所以将js文件放在HTML底部就可以了。