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webpack1234-replace-loader

v1.2.2

Published

A loader for replace string by webpack

Downloads

11

Readme

webpack-replace-loader

一个 webpack 打包时用来替换字符串的 webpack-loader 。

使用场景举例

1 . 在使用 webpack 项目打包的时候,用来将开发环境的请求 URL 替换为 生产环境的 URL 。

2 . 全项目统一查找调整页面配色样式 color , 将 #00ff00 替换为 #ff0700

3 . 大型项目中,依照打包策略在相关文件中写入不同内容。

安装

webpack-replace-loader 作为依赖安装到项目:

 npm install webpack-replace-loader --save-dev

配置使用

配置webpack打包策略:

module: {
  loaders: [
    ...
    {
      test: /test\.js$/,
      loader: 'replace-webpack-loader',
      options: {
        arr: [
          {search: '$BaseUrl', replace: 'https://test.baiduu.com', attr: 'g'},
          {search: '$Title', replace: '社会主义核心价值观', attr: 'g'}
        ]
      }
    }
    ...
  ]
}

示例

test.js :

 var title = '$Title';
 function showTitle () {
   document.title = title;
 }

通过以上 webpack 配置打包后生成 test.js :

var title = '社会主义核心价值观';
function showTitle() {
  document.title = title;
}

在上例中,$Title 的作用仅仅是提供一个查找字符串的 锚点 ,并没有实际意义。

Webpack 的其他配置方法

1 . 将 a.js 中的 BaseUrl 只替换第一个为 https://www.baidu.com/api/ ; Title 全部替换为 " 百度开放接口 " 。

2 . 将 b.js 中的 Location 全部替换为 " BeiJing " 。

module: {
  loaders: [
    ...
    {
      test: /a\.js$/,
      loader: 'replace-webpack-loader',
      options: {
        arr: [
          {search: 'BaseUrl', replace: 'https://www.baidu.com/api/'},
          {search: 'Title', replace: '百度开放接口', attr: 'g'}
        ]
      }
    },
    {
      test: /b\.js$/,
      loader: 'replace-webpack-loader',
      options: {
        search: 'Location',
        replace: 'https://www.baidu.com/api/',
        attr: 'g'
      }
    }
    ...
  ]
}

只要你的替换锚点不相同,你也可以合并写:

module: {
  loaders: [
    ...
    {
      test: /(a\.js|b.js|c\.js)$/,
      loader: 'replace-webpack-loader',
      options: {
        arr: [
          {search: 'BaseUrl', replace: 'https://www.baidu.com/api/'},
          {search: 'Title', replace: '百度开放接口', attr: 'g'}
          {search: 'Location', replace: 'BeiJing', attr: 'g'}
        ]
      }
    }
    ...
  ]
}

包括 .css 文件,.less 文件等 : 将color: red; 修改为 color: #0cff00;

.test {
  color: red;
}

配置:

options: {
  search: 'color: red;',
  replace: 'color: #0cff00;',
  attr: 'g'
}

替换后:

.test {
  color: #0cff00;
}

将 a.hml 文件 的 div 标签换位 span 标签。将 class text 换位 box :

<span>$DOM</span>

配置如下:

options: {
  arr: [
    {search: 'span', replace: 'div'},
    {search: '$DOM', replace: `
      <span class="box">
        <span class="text">社会主义</span>
      </span>
    `}
  ]
}

替换后:

<div>
  <span class="box">
    <span class="text">社会主义</span>
  </span>
</div>

说明

1.2版本后,已做全字符转义,包含但不限于下列情况均可替换。

search: '<a class__';
search: '.a /bcc .g';
search: '[.a]';
search: '--{a-x}';
search: '({[list]})';
search: '/$/abb^';
search: '<c><d></>';
search: '?+^$@><-';