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@babel/plugin-proposal-optional-chaining-assign

转换赋值表达式左侧的可选链。

🌐 Transform optional chaining on the left-hand side of assignment expressions.

示例​

🌐 Example

input.js
function doSomething(maybeOptions) {
  maybeOptions?.retries = 5;
}

将转变为

🌐 will be transformed to

output.js
function doSomething(maybeOptions) {
  maybeOptions !== null && maybeOptions !== void 0 && maybeOptions.retries = 5;
}

安装​

🌐 Installation

npm install --save-dev @babel/plugin-proposal-optional-chaining-assign

用法​

🌐 Usage

🌐 With a configuration file (Recommended)

babel.config.json
{
  "plugins": [
    [
      "@babel/plugin-proposal-optional-chaining-assign",
      {
        "version": "2023-07"
      }
    ]
  ]
}

通过 Node API​

🌐 Via Node API

JavaScript
require("@babel/core").transformSync("code", {
  plugins: [["@babel/plugin-proposal-optional-chaining-assign", {
      "version": "2023-07"
    }]],
});

选项​

🌐 Options

假设​

🌐 Assumptions

这个插件受到了 noDocumentAll 假设的影响。

🌐 This plugin is affected by the noDocumentAll assumption.

version​

必需的。

🌐 Required.

"2023-07"

选择要使用的提案：

🌐 Selects the proposal to use:

参考​

🌐 References