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70 lines
1.0 KiB
Markdown
70 lines
1.0 KiB
Markdown
6 years ago
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# babel-plugin-transform-strict-mode
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> This plugin places a `"use strict";` directive at the top of all files to enable [strict mode](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode).
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This plugin may be enabled via `babel-plugin-transform-es2015-modules-commonjs`.
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If you wish to disable it you can either turn `strict` off or pass
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`strictMode: false` as an option to the commonjs transform.
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## Example
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**In**
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```javascript
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foo();
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```
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**Out**
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```javascript
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"use strict";
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foo();
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```
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## Installation
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```sh
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npm install --save-dev babel-plugin-transform-strict-mode
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```
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## Usage
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### Via `.babelrc` (Recommended)
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**.babelrc**
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Without options:
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```json
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{
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"plugins": ["transform-strict-mode"]
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}
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```
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With options:
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```json
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{
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"plugins": [
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["transform-strict-mode", {
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"strict": true
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}]
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]
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}
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```
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### Via CLI
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```sh
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babel --plugins transform-strict-mode script.js
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```
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### Via Node API
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```javascript
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require("babel-core").transform("code", {
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plugins: ["transform-strict-mode"]
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});
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```
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