webpack HtmlWebpackPlugin 插件如何忽略jsp标签？

Question

webpack配置new HtmlWebpackPlugin({      inject: true,      minify: {        ignoreCustomFragments: [ /\${[a-zA-Z]*?}/],      },      template: paths.appHtml    }),html<script>    var a="${a}";    var b="${b}";</script>报错Template execution failed: ReferenceError: a is not defined请问要怎么配置才能够让插件忽略${}