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@std/esm-0.26.0
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Enable ES modules in Node today!
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | @std/esm-0.26.0 |
| نام | @std/esm |
| نسخه کتابخانه | 0.26.0 |
| نگهدارنده | ['jdalton'] |
| ایمیل نگهدارنده | ['john.david.dalton@gmail.com'] |
| نویسنده | John-David Dalton |
| ایمیل نویسنده | john.david.dalton@gmail.com |
| آدرس صفحه اصلی | git+https://github.com/standard-things/esm.git |
| آدرس اینترنتی | https://github.com/standard-things/esm#readme |
| مجوز | MIT |
# @std/esm
This fast, small, zero-dependency package is all you need to enable
ES modules in Node 6+ today!
See the release [post](https://medium.com/web-on-the-edge/es-modules-in-node-today-32cff914e4b)
:book: and [video](https://www.youtube.com/watch?v=60S1PFndbn0) :movie_camera:
for all the details.
Discontinued
---
This package has been discontinued in favor of [`esm`](https://www.npmjs.com/package/esm).
Getting started
---
Run `npm i --save @std/esm` in your app or package directory.
There are three ways to enable ESM with `@std/esm`.
1. Enable ESM with a CJS bridge:
**index.js**
```js
// Provide options as a parameter, environment variable, or rc file.
require = require("@std/esm")(module/*, options*/)
module.exports = require("./main.mjs").default
```
2. Enable ESM in the Node CLI with the [`-r` option](https://nodejs.org/api/cli.html#cli_r_require_module):
```shell
node -r @std/esm main.mjs
```
3. Enable ESM in the Node REPL:
```shell
node -r @std/esm
```
or upon entering:
```shell
$ node
> require("@std/esm")
@std/esm enabled
```
*Note: All `"cjs"` options are [unlocked](#unlockables) in the Node REPL.*
Standard Features
---
The `@std/esm` loader is as spec-compliant
as possible and follows Node’s [ESM rules](https://github.com/nodejs/node-eps/blob/master/002-es-modules.md).
:point_right: This means, by default, ESM requires the use of the `.mjs` file
extension.<br>
:unlock: You can [unlock](#unlockables) ESM with the `.js` file extension using
the `"js"` ESM mode.
Out of the box `@std/esm` just works, no configuration necessary, and supports:
* [`import`](https://ponyfoo.com/articles/es6-modules-in-depth#import) / [`export`](https://ponyfoo.com/articles/es6-modules-in-depth#export)
* [`import.meta`](https://github.com/tc39/proposal-import-meta)
* [Dynamic `import`](https://github.com/tc39/proposal-dynamic-import)
* [Improved errors](https://github.com/standard-things/esm/wiki/improved-errors)
* [Live bindings](https://ponyfoo.com/articles/es6-modules-in-depth#bindings-not-values)
* [Loading `.mjs` files as ESM](https://github.com/nodejs/node-eps/blob/master/002-es-modules.md#32-determining-if-source-is-an-es-module)
* [The file URI scheme](https://en.wikipedia.org/wiki/File_URI_scheme)
* Node [`--eval`](https://nodejs.org/api/cli.html#cli_e_eval_script) and [`--print`](https://nodejs.org/api/cli.html#cli_p_print_script) flags
* Node 6+ support
Unlockables
---
Unlock features with options specified as one of the following:
* The `"@std/esm"` field in your package.json
* [JSON6](https://github.com/d3x0r/json6) in an .esmrc or .esmrc.json file
* JSON6 or file path in the `ESM_OPTIONS` environment variable
* CJS/ESM in an .esmrc.js or .esmrc.mjs file
Commonly used options may be specified in shorthand form:
* `"@std/esm":"js"` is shorthand for `"@std/esm":{"mode":"js"}`
* `"@std/esm":"cjs"` is shorthand for `"@std/esm":{"cjs":true,"mode":"js"}`
<table><tr><td colspan=2><code>{</code><tr><td valign=top><code>"mode":</code><td><p>A string mode:<ul><li><code>"all"</code> files as ESM<li><code>"js"</code> and other files with <code>import</code>, <code>import.meta</code>, <code>export</code>, or <a href=https://github.com/tc39/proposal-modules-pragma><code>"use module"</code></a> as ESM</ul><tr><td valign=top><code>"cjs":</code><td><p>A boolean or object to unlock CJS features in ESM.<details><summary>Unlockable Features</summary><table><tr><td colspan=2><code>{</code><tr><td valign=top><code>"cache":</code><td><p>A boolean for storing ES modules in <code>require.cache</code>.<tr><td valign=top><code>"extensions":</code><td><p>A boolean for respecting <code>require.extensions</code> in ESM.<tr><td valign=top><code>"interop":</code><td><p>A boolean for <code>__esModule</code> interoperability.<tr><td valign=top><code>"namedExports":</code><td><p>A boolean for <a href=https://ponyfoo.com/articles/es6-modules-in-depth#importing-named-exports>importing named exports</a> of CJS modules.<tr><td valign=top><code>"paths":</code><td><p>A boolean for following CJS <a href=https://github.com/nodejs/node-eps/blob/master/002-es-modules.md#432-removal-of-non-local-dependencies>path rules</a> in ESM.<tr><td valign=top><code>"topLevelReturn":</code><td><p>A boolean for <a href=http://stackoverflow.com/questions/28955047/why-does-a-module-level-return-statement-work-in-node-js/#28955050>top-level <code>return</code></a>.<tr><td valign=top><code>"vars":</code><td><p>A boolean for <code>__dirname</code>, <code>__filename</code>, and <code>require</code> in ESM.<tr><td colspan=2><code>}</code></table></details><tr><td valign=top><code>"await":</code><td><p>A boolean for <a href=https://github.com/MylesBorins/proposal-top-level-await#variant-c-top-level-await-can-only-be-used-in-modules-without-exports>top-level <code>await</code></a> in modules without ESM exports. <i>(requires Node 7.6+)</i><tr><td colspan=2><code>}</code></table>
DevOpts
---
<table><tr><td colspan=2><code>{</code><tr><td valign=top><code>"cache":</code><td><p>A boolean for toggling cache creation or string path of the cache directory.<tr><td valign=top><code>"debug":</code><td><p>A boolean for unmasking stack traces.<tr><td valign=top><code>"sourceMap":</code><td><p>A boolean for including inline source maps.<tr><td valign=top><code>"warnings":</code><td><p>A boolean for logging development parse and runtime warnings.<tr><td colspan=2><code>}</code></table>
Tips
---
* Load `@std/esm` before
[`@babel/register`](https://github.com/babel/babel/tree/master/packages/babel-register) v7+
* Load `@std/esm` with the *“require”* option of
[`ava`](https://github.com/avajs/ava#options),
[`mocha`](https://mochajs.org/#-r---require-module-name),
[`nyc`](https://github.com/istanbuljs/nyc#require-additional-modules), and
[`tape`](https://github.com/substack/tape#preloading-modules)
* Load `@std/esm` with the `--node-arg=-r --node-arg=@std/esm` option of
[`node-tap`](http://www.node-tap.org/cli/)
* Load `@std/esm` with the `--node-args="-r @std/esm"` option of
[`pm2`](http://pm2.keymetrics.io/docs/usage/quick-start/#options)
* Load `@std/esm` with [`wallaby.js`](https://wallabyjs.com/docs/integration/node.html#es-modules)
* Use `@std/esm` to load [`jasmine`](https://jasmine.github.io/setup/nodejs.html#a-simple-example-using-the-library)
* Use `"@std/esm":"cjs"` for the `--watch` and `--watch-extensions` options of
[`mocha`](https://mochajs.org/#-w---watch)
* Use `"@std/esm":"cjs"` for [`ava`](https://github.com/avajs/ava) and [`webpack`](https://github.com/webpack/webpack)
* When in doubt, use `"@std/esm":"cjs"`
زبان مورد نیاز
| مقدار | نام |
|---|---|
| 9.9.0 | Npm |
نحوه نصب
نصب پکیج tgz @std/esm-0.26.0:
npm install @std/esm-0.26.0.tgz