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misc/upgrade-to-3.6.md

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# 升级到 3.6
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## 规则变更
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- css import 规则变更,@import '~foo' 表示 foo 模块,@import 'foo' 表示 foo 文件,[](https://github.com/spmjs/spm-sea/issues/2)
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比如:
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```css
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@import 'alice-base';
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```
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要改成 :
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```css
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@import '~alice-base';
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```
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## 组件开发
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主要是 markdown 文件写法变更:
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- 只能使用 commonjs 写法,不再支持 cmd 的方式
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- 不能 require 相对文件,只能 require 包
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比如:
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```
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seajs.use('./index', 'jquery', function(Dialog, $) {
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new Dialog($('#el'));
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});
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```
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要修改成:
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```
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var Dialog = require('dialog');
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var $ = require('jquery');
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new Dialog($('#el'));
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```
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## 项目开发
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主要是配置项变更:
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- build 相关的配置项全部移到 build 属性下
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- output 中不支持写 css 文件,需通过 `extractCSS` 属性来解决,[Demo](https://github.com/spmjs/examples/tree/spm-webpack/react)
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- 更多详见:[配置项](../project/configuration.md)
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另外:
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- 项目调试使用 `spm server` 而不是 `spm-server`,详见:[调试](../project/debug.md)
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