mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-25 09:55:15 +00:00
295 lines
8.4 KiB
Markdown
295 lines
8.4 KiB
Markdown
<p align="center">
|
|
<a href="https://travis-ci.org/evcohen/jsx-ast-utils">
|
|
<img src="https://api.travis-ci.org/evcohen/jsx-ast-utils.svg?branch=master"
|
|
alt="build status">
|
|
</a>
|
|
<a href="https://npmjs.org/package/jsx-ast-utils">
|
|
<img src="https://img.shields.io/npm/v/jsx-ast-utils.svg"
|
|
alt="npm version">
|
|
</a>
|
|
<a href="https://github.com/evcohen/jsx-ast-utils/blob/master/LICENSE.md">
|
|
<img src="https://img.shields.io/npm/l/jsx-ast-utils.svg"
|
|
alt="license">
|
|
</a>
|
|
<a href='https://coveralls.io/github/evcohen/jsx-ast-utils?branch=master'>
|
|
<img src='https://coveralls.io/repos/github/evcohen/jsx-ast-utils/badge.svg?branch=master' alt='Coverage Status' />
|
|
</a>
|
|
<a href='https://npmjs.org/package/jsx-ast-utils'>
|
|
<img src='https://img.shields.io/npm/dt/jsx-ast-utils.svg'
|
|
alt='Total npm downloads' />
|
|
</a>
|
|
</p>
|
|
|
|
# jsx-ast-utils
|
|
|
|
AST utility module for statically analyzing JSX.
|
|
|
|
## Installation
|
|
```sh
|
|
$ npm i jsx-ast-utils --save
|
|
```
|
|
|
|
## Usage
|
|
This is a utility module to evaluate AST objects for JSX syntax. This can be super useful when writing linting rules for JSX code. It was originally in the code for [eslint-plugin-jsx-a11y](https://github.com/evcohen/eslint-plugin-jsx-a11y), however I thought it could be useful to be extracted and maintained separately so **you** could write new interesting rules to statically analyze JSX.
|
|
|
|
### ESLint example
|
|
```js
|
|
import { hasProp } from 'jsx-ast-utils';
|
|
// OR: var hasProp = require('jsx-ast-utils').hasProp;
|
|
// OR: const hasProp = require('jsx-ast-utils/hasProp');
|
|
// OR: import hasProp from 'jsx-ast-utils/hasProp';
|
|
|
|
module.exports = context => ({
|
|
JSXOpeningElement: node => {
|
|
const onChange = hasProp(node.attributes, 'onChange');
|
|
|
|
if (onChange) {
|
|
context.report({
|
|
node,
|
|
message: `No onChange!`
|
|
});
|
|
}
|
|
}
|
|
});
|
|
```
|
|
|
|
## API
|
|
### AST Resources
|
|
1. [JSX spec](https://github.com/facebook/jsx/blob/master/AST.md)
|
|
2. [JS spec](https://github.com/estree/estree/blob/master/spec.md)
|
|
|
|
### hasProp
|
|
```js
|
|
hasProp(props, prop, options);
|
|
```
|
|
Returns boolean indicating whether an prop exists as an attribute on a JSX element node.
|
|
|
|
#### Props
|
|
Object - The attributes on the visited node. (Usually `node.attributes`).
|
|
#### Prop
|
|
String - A string representation of the prop you want to check for existence.
|
|
#### Options
|
|
Object - An object representing options for existence checking
|
|
1. `ignoreCase` - automatically set to `true`.
|
|
2. `spreadStrict` - automatically set to `true`. This means if spread operator exists in
|
|
props, it will assume the prop you are looking for is not in the spread.
|
|
Example: `<div {...props} />` looking for specific prop here will return false if `spreadStrict` is `true`.
|
|
|
|
<hr />
|
|
|
|
### hasAnyProp
|
|
|
|
```js
|
|
hasAnyProp(props, prop, options);
|
|
```
|
|
Returns a boolean indicating if **any** of props in `prop` argument exist on the node.
|
|
|
|
#### Props
|
|
Object - The attributes on the visited node. (Usually `node.attributes`).
|
|
#### Prop
|
|
Array<String> - An array of strings representing the props you want to check for existence.
|
|
#### Options
|
|
Object - An object representing options for existence checking
|
|
1. `ignoreCase` - automatically set to `true`.
|
|
2. `spreadStrict` - automatically set to `true`. This means if spread operator exists in
|
|
props, it will assume the prop you are looking for is not in the spread.
|
|
Example: `<div {...props} />` looking for specific prop here will return false if `spreadStrict` is `true`.
|
|
|
|
<hr />
|
|
|
|
### hasEveryProp
|
|
|
|
```js
|
|
hasEveryProp(props, prop, options);
|
|
```
|
|
Returns a boolean indicating if **all** of props in `prop` argument exist on the node.
|
|
|
|
#### Props
|
|
Object - The attributes on the visited node. (Usually `node.attributes`).
|
|
#### Prop
|
|
Array<String> - An array of strings representing the props you want to check for existence.
|
|
#### Options
|
|
Object - An object representing options for existence checking
|
|
1. `ignoreCase` - automatically set to `true`.
|
|
2. `spreadStrict` - automatically set to `true`. This means if spread operator exists in
|
|
props, it will assume the prop you are looking for is not in the spread.
|
|
Example: `<div {...props} />` looking for specific prop here will return false if `spreadStrict` is `true`.
|
|
|
|
<hr />
|
|
|
|
### getProp
|
|
|
|
```js
|
|
getProp(props, prop, options);
|
|
```
|
|
Returns the JSXAttribute itself or undefined, indicating the prop is not present on the JSXOpeningElement.
|
|
|
|
#### Props
|
|
Object - The attributes on the visited node. (Usually `node.attributes`).
|
|
#### Prop
|
|
String - A string representation of the prop you want to check for existence.
|
|
#### Options
|
|
Object - An object representing options for existence checking
|
|
1. `ignoreCase` - automatically set to `true`.
|
|
|
|
<hr />
|
|
|
|
### elementType
|
|
```js
|
|
elementType(node)
|
|
```
|
|
Returns the tagName associated with a JSXElement.
|
|
|
|
#### Node
|
|
Object - The visited JSXElement node object.
|
|
|
|
<hr />
|
|
|
|
### getPropValue
|
|
|
|
```js
|
|
getPropValue(prop);
|
|
```
|
|
Returns the value of a given attribute. Different types of attributes have their associated values in different properties on the object.
|
|
|
|
This function should return the most *closely* associated value with the intention of the JSX.
|
|
|
|
#### Prop
|
|
Object - The JSXAttribute collected by AST parser.
|
|
|
|
<hr />
|
|
|
|
### getLiteralPropValue
|
|
|
|
```js
|
|
getLiteralPropValue(prop);
|
|
```
|
|
Returns the value of a given attribute. Different types of attributes have their associated values in different properties on the object.
|
|
|
|
This function should return a value only if we can extract a literal value from its attribute (i.e. values that have generic types in JavaScript - strings, numbers, booleans, etc.)
|
|
|
|
#### Prop
|
|
Object - The JSXAttribute collected by AST parser.
|
|
|
|
<hr />
|
|
|
|
### propName
|
|
|
|
```js
|
|
propName(prop);
|
|
```
|
|
Returns the name associated with a JSXAttribute. For example, given `<div foo="bar" />` and the JSXAttribute for `foo`, this will return the string `"foo"`.
|
|
|
|
#### Prop
|
|
Object - The JSXAttribute collected by AST parser.
|
|
|
|
<hr />
|
|
|
|
### eventHandlers
|
|
|
|
```js
|
|
console.log(eventHandlers);
|
|
/*
|
|
[
|
|
'onCopy',
|
|
'onCut',
|
|
'onPaste',
|
|
'onCompositionEnd',
|
|
'onCompositionStart',
|
|
'onCompositionUpdate',
|
|
'onKeyDown',
|
|
'onKeyPress',
|
|
'onKeyUp',
|
|
'onFocus',
|
|
'onBlur',
|
|
'onChange',
|
|
'onInput',
|
|
'onSubmit',
|
|
'onClick',
|
|
'onContextMenu',
|
|
'onDblClick',
|
|
'onDoubleClick',
|
|
'onDrag',
|
|
'onDragEnd',
|
|
'onDragEnter',
|
|
'onDragExit',
|
|
'onDragLeave',
|
|
'onDragOver',
|
|
'onDragStart',
|
|
'onDrop',
|
|
'onMouseDown',
|
|
'onMouseEnter',
|
|
'onMouseLeave',
|
|
'onMouseMove',
|
|
'onMouseOut',
|
|
'onMouseOver',
|
|
'onMouseUp',
|
|
'onSelect',
|
|
'onTouchCancel',
|
|
'onTouchEnd',
|
|
'onTouchMove',
|
|
'onTouchStart',
|
|
'onScroll',
|
|
'onWheel',
|
|
'onAbort',
|
|
'onCanPlay',
|
|
'onCanPlayThrough',
|
|
'onDurationChange',
|
|
'onEmptied',
|
|
'onEncrypted',
|
|
'onEnded',
|
|
'onError',
|
|
'onLoadedData',
|
|
'onLoadedMetadata',
|
|
'onLoadStart',
|
|
'onPause',
|
|
'onPlay',
|
|
'onPlaying',
|
|
'onProgress',
|
|
'onRateChange',
|
|
'onSeeked',
|
|
'onSeeking',
|
|
'onStalled',
|
|
'onSuspend',
|
|
'onTimeUpdate',
|
|
'onVolumeChange',
|
|
'onWaiting',
|
|
'onLoad',
|
|
'onError',
|
|
'onAnimationStart',
|
|
'onAnimationEnd',
|
|
'onAnimationIteration',
|
|
'onTransitionEnd',
|
|
]
|
|
*/
|
|
```
|
|
|
|
Contains a flat list of common event handler props used in JSX to attach behaviors
|
|
to DOM events.
|
|
|
|
#### eventHandlersByType
|
|
|
|
The same list as `eventHandlers`, grouped into types.
|
|
|
|
```js
|
|
console.log(eventHandlersByType);
|
|
/*
|
|
{
|
|
clipboard: [ 'onCopy', 'onCut', 'onPaste' ],
|
|
composition: [ 'onCompositionEnd', 'onCompositionStart', 'onCompositionUpdate' ],
|
|
keyboard: [ 'onKeyDown', 'onKeyPress', 'onKeyUp' ],
|
|
focus: [ 'onFocus', 'onBlur' ],
|
|
form: [ 'onChange', 'onInput', 'onSubmit' ],
|
|
mouse: [ 'onClick', 'onContextMenu', 'onDblClick', 'onDoubleClick', 'onDrag', 'onDragEnd', 'onDragEnter', 'onDragExit', 'onDragLeave', 'onDragOver', 'onDragStart', 'onDrop', 'onMouseDown', 'onMouseEnter', 'onMouseLeave', 'onMouseMove', 'onMouseOut', 'onMouseOver', 'onMouseUp' ],
|
|
selection: [ 'onSelect' ],
|
|
touch: [ 'onTouchCancel', 'onTouchEnd', 'onTouchMove', 'onTouchStart' ],
|
|
ui: [ 'onScroll' ],
|
|
wheel: [ 'onWheel' ],
|
|
media: [ 'onAbort', 'onCanPlay', 'onCanPlayThrough', 'onDurationChange', 'onEmptied', 'onEncrypted', 'onEnded', 'onError', 'onLoadedData', 'onLoadedMetadata', 'onLoadStart', 'onPause', 'onPlay', 'onPlaying', 'onProgress', 'onRateChange', 'onSeeked', 'onSeeking', 'onStalled', 'onSuspend', 'onTimeUpdate', 'onVolumeChange', 'onWaiting' ],
|
|
image: [ 'onLoad', 'onError' ],
|
|
animation: [ 'onAnimationStart', 'onAnimationEnd', 'onAnimationIteration' ],
|
|
transition: [ 'onTransitionEnd' ],
|
|
}
|
|
*/
|
|
```
|