58 lines
932 B
Markdown
58 lines
932 B
Markdown
# @babel/plugin-transform-strict-mode
|
|
|
|
> 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).
|
|
|
|
This plugin may be enabled via `@babel/plugin-transform-modules-commonjs`.
|
|
If you wish to disable it you can either turn `strict` off or pass
|
|
`strictMode: false` as an option to the commonjs transform.
|
|
|
|
## Example
|
|
|
|
**In**
|
|
|
|
```javascript
|
|
foo();
|
|
```
|
|
|
|
**Out**
|
|
|
|
```javascript
|
|
"use strict";
|
|
|
|
foo();
|
|
```
|
|
|
|
## Installation
|
|
|
|
```sh
|
|
npm install --save-dev @babel/plugin-transform-strict-mode
|
|
```
|
|
|
|
## Usage
|
|
|
|
### Via `.babelrc` (Recommended)
|
|
|
|
**.babelrc**
|
|
|
|
|
|
```json
|
|
{
|
|
"plugins": ["@babel/transform-strict-mode"]
|
|
}
|
|
```
|
|
|
|
|
|
### Via CLI
|
|
|
|
```sh
|
|
babel --plugins @babel/transform-strict-mode script.js
|
|
```
|
|
|
|
### Via Node API
|
|
|
|
```javascript
|
|
require("@babel/core").transform("code", {
|
|
plugins: ["@babel/transform-strict-mode"]
|
|
});
|
|
```
|