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condition-loader

v1.0.5

Published

webpack conditional loader for any type of text file

Downloads

1,194

Readme

conditional loader for webpack

Webpack loader that allows text file conditional compilation directly from Webpack.

  • 支持js、html、vue、css其他任何文本文件(support javascript、html、vue、css and any other text file).
  • 支持命令#if、#else、#elseif、#endif
  • 命令务必独立一行
  • 命令务必包含在注释内,注释现匹配开始字符<!-- or // or /*

install

npm install condition-loader --save-dev

example

js example

// #if DEBUG
console.log('this is debug code');
// #endif

/* #if DEBUG */
console.log('DEBUG')
    // #if version < 1
    console.log('version < 0')
    // #elseif version < 2
    console.log('version > 1 and version < 2')
    // #else
    console.log('version > 2')
    // #endif
// #endif

html example

<!--#if DEBUG-->
<div>DEBUG</div>
<!--#endif-->

webpack config example

let defs = {
    DEBUG: true,
    version: 1.1
}
module.exports = {
    entry: {
        index: './test/index.js'
    },
    output: {
        path: __dirname + '/test',
        filename: 'output.js'
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                loader: 'condition-loader',
                options: defs
            },
            {
                test: /\.html$/,
                use: [
                    {
                        loader: 'html-loader'
                    },
                    {
                        loader: 'condition-loader',
                        options: defs
                    }
                ]
            }
        ]
    }
}

License

MIT

注意问题

  • less等类型文件假如配置了condition-loader,只会对js直接引入的样式文件或者vue文件内部的样式生效,less中再次@import引入的文件只会经过less处理,不会通过condition-loader

version

  • 1.0.5
    • 修复windows的\r\n换行符格式
  • 1.0.4
    • 不需要使用map,避免影响webpack-dev-server时缓存
  • 1.0.3
    • 命令前缀检查,匹配开始字符<!-- or // or /*
  • 1.0.2
    • remove log;
    • add semicolon before return at the evaluate code
  • 1.0.0
    • support if,else,elseif,endif command.