flying-hero
96f6318101
新增: - backend/venv/ - Python 虚拟环境 - backend/start.sh - 启动脚本（使用虚拟环境） - backend/requirements.txt - 依赖列表 - .gitignore - 忽略虚拟环境和缓存文件 说明: - 每个项目使用独立虚拟环境 - 避免依赖冲突 - 启动脚本自动创建和激活虚拟环境
20 lines
444 B
Markdown
20 lines
444 B
Markdown
# @babel/plugin-proposal-optional-chaining
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> Transform optional chaining operators into a series of nil checks
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See our website [@babel/plugin-proposal-optional-chaining](https://babeljs.io/docs/en/babel-plugin-proposal-optional-chaining) for more information.
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## Install
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Using npm:
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```sh
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npm install --save-dev @babel/plugin-proposal-optional-chaining
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```
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or using yarn:
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```sh
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yarn add @babel/plugin-proposal-optional-chaining --dev
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```
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