### Install @jsep-plugin/async-await

Source: https://github.com/ericsmekens/jsep/blob/master/packages/async-await/README.md

Install the plugin using npm or yarn.

```console
npm install @jsep-plugin/async-await
# or
yarn add @jsep-plugin/async-await
```

--------------------------------

### Install @jsep-plugin/spread

Source: https://github.com/ericsmekens/jsep/blob/master/packages/spread/README.md

Install the plugin with npm or yarn.

```console
npm install @jsep-plugin/spread
# or
yarn add @jsep-plugin/spread
```

--------------------------------

### Install with npm or yarn

Source: https://github.com/ericsmekens/jsep/blob/master/packages/assignment/README.md

Install the plugin using npm or yarn.

```console
npm install @jsep-plugin/assignment
# or
yarn add @jsep-plugin/assignment
```

--------------------------------

### Install dependencies with pnpm

Source: https://github.com/ericsmekens/jsep/blob/master/CONTRIBUTING.md

Run this command in the project root to install dependencies.

```bash
pnpm install
```

--------------------------------

### Prepare project with pnpm

Source: https://github.com/ericsmekens/jsep/blob/master/CONTRIBUTING.md

Run this command after installing dependencies to prepare the project for development.

```bash
pnpm run prepare
```

--------------------------------

### Install @jsep-plugin/regex

Source: https://github.com/ericsmekens/jsep/blob/master/packages/regex/README.md

Install the plugin via npm or yarn.

```console
npm install @jsep-plugin/regex
# or
yarn add @jsep-plugin/regex
```

--------------------------------

### Install @jsep-plugin/template

Source: https://github.com/ericsmekens/jsep/blob/master/packages/template/README.md

Install the plugin via npm or yarn.

```console
npm install @jsep-plugin/template
# or
yarn add @jsep-plugin/template
```

--------------------------------

### Usage example

Source: https://github.com/ericsmekens/jsep/blob/master/packages/numbers/README.md

Registers the plugin with JSEP.

```javascript
import jsep from 'jsep';
import jsepNumbers from '@jsep-plugin/numbers';
jsep.plugins.register(jsepNumbers);
```

--------------------------------

### Install @jsep-plugin/new with npm or yarn

Source: https://github.com/ericsmekens/jsep/blob/master/packages/new/README.md

Install the plugin using npm or yarn.

```console
npm install @jsep-plugin/new
# or
yarn add @jsep-plugin/new
```

--------------------------------

### Install @jsep-plugin/object

Source: https://github.com/ericsmekens/jsep/blob/master/packages/object/README.md

Install the plugin via npm or yarn.

```console
npm install @jsep-plugin/object
# or
yarn add @jsep-plugin/object
```

--------------------------------

### Install @jsep-plugin/ternary via npm or yarn

Source: https://github.com/ericsmekens/jsep/blob/master/packages/ternary/README.md

Install the plugin using npm or yarn. The commands are shown in a console block.

```console
npm install @jsep-plugin/ternary
# or
yarn add @jsep-plugin/ternary
```

--------------------------------

### Example of number formats

Source: https://github.com/ericsmekens/jsep/blob/master/packages/numbers/README.md

Shows how the plugin parses hexadecimal, binary, octal, and decimal numbers with underscores.

```javascript
jsep('0xA'); // hexadecimal (10)  
jsep('0b01001010'); // binary (74)
jsep('0644'); // octal (420)
jsep('0o644'); // octal (420)
jsep('115_200'); // decimal (115200)
```

--------------------------------

### Build jsep with npm install and npm run default

Source: https://github.com/ericsmekens/jsep/blob/master/README.md

Run these commands in the jsep project directory to create the built files in the build/ directory.

```bash
npm install
npm run default
```

--------------------------------

### Comment expression examples

Source: https://github.com/ericsmekens/jsep/blob/master/packages/comment/README.md

Shows three example expressions that the plugin can parse, including end-of-line and block comments.

```javascript
jsep('a = 2 // end of line comment');
jsep('a /* ignore this */ += 2');
jsep('a /* ignore \n this */ ++');
```

--------------------------------

### Spread expression examples

Source: https://github.com/ericsmekens/jsep/blob/master/packages/spread/README.md

Shows the three expression forms the plugin enables: spread in a function call, object spread, and array spread.

```javascript
jsep('fn(1, ...a)');
jsep('{ ...a }');
jsep('[...a]');
```

--------------------------------

### Regex expression examples

Source: https://github.com/ericsmekens/jsep/blob/master/packages/regex/README.md

Shows the supported regex expression forms that the plugin enables, including literal patterns, flags, and a regex method call.

```javascript
jsep('/abc/');
jsep('/abc/ig');
jsep('/[a-z]{3}/ig.test(a)');
```

--------------------------------

### Assignment expression examples

Source: https://github.com/ericsmekens/jsep/blob/master/packages/assignment/README.md

Shows the assignment expressions supported by the plugin: assignment, compound assignment, and increment/decrement operators.

```javascript
jsep('a = 2');
jsep('a += 2');
jsep('a++');
jsep('--aa');
```

--------------------------------

### Template literal expression examples

Source: https://github.com/ericsmekens/jsep/blob/master/packages/template/README.md

Shows the two forms of template literal expressions supported by this plugin: a plain template literal and a tagged template literal with a tag name.

```javascript
jsep('`hi ${name}`');
jsep('msg`hi ${name}`');
```

--------------------------------

### Register @jsep-plugin/async-await

Source: https://github.com/ericsmekens/jsep/blob/master/packages/async-await/README.md

Import and register the plugin with JSEP.

```javascript
import jsep from 'jsep';
import jsepAsyncAwait from '@jsep-plugin/async-await';
jsep.plugins.register(jsepAsyncAwait);
```

--------------------------------

### Using @jsep-plugin/new to parse new expressions

Source: https://github.com/ericsmekens/jsep/blob/master/packages/new/README.md

Shows how to use the plugin to parse expressions like `new Date()` and `new RegExp("^\d+$")`.

```javascript
jsep('new Date()');
jsep('new RegExp("^\d+$")');
```

--------------------------------

### Register @jsep-plugin/new with JSEP

Source: https://github.com/ericsmekens/jsep/blob/master/packages/new/README.md

Import the plugin and register it with JSEP to enable `new` expression support.

```javascript
import jsep from 'jsep';
import jsepNew from '@jsep-plugin/new';
jsep.plugins.register(jsepNew);
```

--------------------------------

### Lint code with npm

Source: https://github.com/ericsmekens/jsep/blob/master/CONTRIBUTING.md

Run this command before committing to ensure code does not violate the project's ESLint code style.

```bash
npm run lint
```

--------------------------------

### Register plugin with JSEP

Source: https://github.com/ericsmekens/jsep/blob/master/packages/arrow/README.md

Import the plugin and register it with JSEP to enable arrow-function support.

```javascript
import jsep from 'jsep';
import jsepArrow from '@jsep-plugin/arrow';
jsep.plugins.register(jsepArrow);
```

--------------------------------

### Register plugin with JSEP

Source: https://github.com/ericsmekens/jsep/blob/master/packages/assignment/README.md

Import the plugin and register it with JSEP to enable assignment expression support.

```javascript
import jsep from 'jsep';
import jsepAssignment from '@jsep-plugin/assignment';
jsep.plugins.register(jsepAssignment);
```

--------------------------------

### Register the ternary plugin with JSEP

Source: https://github.com/ericsmekens/jsep/blob/master/packages/ternary/README.md

Import jsep and the plugin, then register it using jsep.plugins.register(). This enables ternary expression support.

```javascript
import jsep from 'jsep';
import jsepTernary from '@jsep-plugin/ternary';
jsep.plugins.register(jsepTernary);
```

--------------------------------

### Client-side usage with ES module and IIFE builds

Source: https://github.com/ericsmekens/jsep/blob/master/README.md

Shows two ways to load jsep in the browser: an ES module import from jsep.min.js and a classic script tag using jsep.iife.min.js. Both parse the expression '1 + 1'.

```html
<script type="module">
  import jsep from '/PATH/TO/jsep.min.js';
  const parsed = jsep('1 + 1');
</script>

<script src="/PATH/TO/jsep.iife.min.js"></script>
  ...
let parse_tree = jsep("1 + 1");
```

--------------------------------

### Parse ternary expression with jsep('a ? 1 : 2')

Source: https://github.com/ericsmekens/jsep/blob/master/packages/ternary/README.md

Shows how to use the plugin to parse a ternary expression. The expression 'a ? 1 : 2' is passed to jsep().

```javascript
jsep('a ? 1 : 2');
```

--------------------------------

### JSEP async/await expressions

Source: https://github.com/ericsmekens/jsep/blob/master/packages/async-await/README.md

Shows the supported expression forms: 'await a' and 'await a.find(async (v1, v2) => await v1(v2))'.

```javascript
jsep('await a');
jsep('await a.find(async (v1, v2) => await v1(v2))');
```

--------------------------------

### Register @jsep-plugin/object with JSEP

Source: https://github.com/ericsmekens/jsep/blob/master/packages/object/README.md

Register the plugin with JSEP to enable object expression support.

```javascript
import jsep from 'jsep';
import jsepObject from '@jsep-plugin/object';
jsep.plugins.register(jsepObject);
```

--------------------------------

### Register the regex plugin

Source: https://github.com/ericsmekens/jsep/blob/master/packages/regex/README.md

Registers the regex plugin with JSEP so that regex expressions are parsed.

```javascript
import jsep from 'jsep';
import jsepRegex from '@jsep-plugin/regex';
jsep.plugins.register(jsepRegex);
```

--------------------------------

### ESLint rule: semi

Source: https://github.com/ericsmekens/jsep/blob/master/CONTRIBUTING.md

Mandatory semicolons.

```json
"semi": 1
```

--------------------------------

### ESLint rule: no-dupe-args

Source: https://github.com/ericsmekens/jsep/blob/master/CONTRIBUTING.md

Disallows duplicate parameter names in function declarations or expressions.

```json
"no-dupe-args": 1
```

--------------------------------

### Register the spread plugin

Source: https://github.com/ericsmekens/jsep/blob/master/packages/spread/README.md

Registers the spread plugin with JSEP so spread expressions are parsed.

```javascript
import jsep from 'jsep';
import jsepSpread from '@jsep-plugin/spread';
jsep.plugins.register(jsepSpread);
```

--------------------------------

### Register the template literal plugin

Source: https://github.com/ericsmekens/jsep/blob/master/packages/template/README.md

Registers the template literal plugin with JSEP. Import the plugin and call jsep.plugins.register.

```javascript
import jsep from 'jsep';
import jsepTemplateLiteral from '@jsep-plugin/template';
jsep.plugins.register(jsepTemplateLiteral);
```

--------------------------------

### ESLint rule: no-unreachable

Source: https://github.com/ericsmekens/jsep/blob/master/CONTRIBUTING.md

Disallows unreachable code after return, throw, continue, and break statements.

```json
"no-unreachable": 1
```

--------------------------------

### Arrow function expressions

Source: https://github.com/ericsmekens/jsep/blob/master/packages/arrow/README.md

Shows the arrow-function expressions supported by the plugin, such as `v => v === 1`, `(v, i) => i`, and `() => true`.

```javascript
jsep('a.find(v => v === 1)');
jsep('a.map((v, i) => i)');
jsep('a.map(() => true)');
```

--------------------------------

### Parse object expression with @jsep-plugin/object

Source: https://github.com/ericsmekens/jsep/blob/master/packages/object/README.md

Parses an object expression with nested object and member access using the JSEP plugin.

```javascript
jsep('{ a: 1, b: { c }}[d]');
```

--------------------------------

### ESLint rule: no-dupe-keys

Source: https://github.com/ericsmekens/jsep/blob/master/CONTRIBUTING.md

Disallows duplicate keys in object literals.

```json
"no-dupe-keys": 1
```