hexo/node_modules/bowser/README.md

## Bowser
A Browser detector. Because sometimes, there is no other way, and not even good modern browsers always provide good feature detection mechanisms.

[![Build Status](https://travis-ci.org/lancedikson/bowser.svg?branch=master)](https://travis-ci.org/lancedikson/bowser)

So... it works like this:

``` js
if (bowser.msie && bowser.version <= 6) {
  alert('Hello China');
}
```

## 1.1.0 breaking changes
We don't save built script in the repo anymore. The main file (`src/bowser.js`) is available through NPM or Bower.
Also you can download minified file from [the release page](https://github.com/ded/bowser/releases).

## 1.0.0 breaking changes
`browser = require('bowser').browser;` becomes `bowser = require('bowser');`

---

## API

### bowser`:Object`
Use it to get object with detected flags of your current browser.

### bowser._detect(ua `:String`)`:Object`
Use it to get object with detected flags from User Agent string.

### bowser.check(minVersions`:Object`, strictMode`:Boolean`, [ua]`:String`)`:Boolean`
Use it to check if browser is supported. In default non-strict mode any browser family not present in `minVersions` will pass the check (like Chrome in the third call in the sample bellow). When strict mode is enabled then any not specified browser family in `minVersions` will cause `check` to return `false` (in the sample it is the fourth call, the last one).

``` js
/**
 * in case of using IE10
 */
bowser.check({msie: "11"});  // true
bowser.check({msie: "9.0"}); // false

/**
 * specific user agent
 */
bowser.check({chrome: "45"}, window.navigator.userAgent); // true

/**
 * but false in strict mode
 */
bowser.check({chrome: "45"}, true, window.navigator.userAgent); // false
```

### bowser.compareVersions(versions`:Array<String>`)`:Number`
Use it to compare two versions.

``` js
bowser.compareVersions(['9.0', '10']);
// -1
```

### bowser.isUnsupportedBrowser(minVersions`:Object`, [strictMode]`:Boolean`, [ua]`:string`)`:Boolean`
Use it to check if browser is unsupported.

``` js
bowser.isUnsupportedBrowser({msie: "10"}, window.navigator.userAgent);
// true / false
```

See more examples in [tests](test/test.js).

---

## Bowser Flags
Your mileage may vary, but these flags should be set.  See Contributing below.

``` js
alert('Hello ' + bowser.name + ' ' + bowser.version);
```

### All detected browsers
These flags are set for all detected browsers:

* `name` - A human readable name for this browser.  E.g. 'Chrome', ''
* `version` - Version number for the browser.  E.g. '32.0'

For unknown browsers, Bowser makes a best guess from the UA string.  So, these may not be set.

### Rendering engine flags
If detected, one of these flags may be set to true:

  * `webkit` - Chrome 0-27, Android <4.4, iOs, BB, etc.
  * `blink` - Chrome >=28, Android >=4.4, Opera, etc.
  * `gecko` - Firefox, etc.
  * `msie`  - IE <= 11
  * `msedge` - IE > 11

Safari, Chrome and some other minor browsers will report that they have `webkit` engines.
Firefox and Seamonkey will report that they have `gecko` engines.

``` js
if (bowser.webkit) {
  // do stuff with safari & chrome & opera & android & blackberry & webos & silk
}
```

### Device flags
If detected, one of these flags may be set to true:

  * `mobile` - All detected mobile OSes are additionally flagged `mobile`, **unless it's a tablet**
  * `tablet` - If a tablet device is detected, the flag `tablet` is **set instead of `mobile`**.

### Browser flags
If detected, one of these flags may be set to true.  The rendering engine flag is shown in []'s:

  * `chrome` - [`webkit`|`blink`]
  * `chromium` - [`webkit`|`blink`]
  * `firefox` - [`gecko`]
  * `msie`
  * `msedge`
  * `safari` - [`webkit`]
  * `android` - native browser - [`webkit`|`blink`]
  * `ios` - native browser - [`webkit`]
  * `opera` - [`blink` if >=15]
  * `samsungBrowser` - [`blink`]
  * `phantom` - [`webkit`]
  * `blackberry` - native browser - [`webkit`]
  * `webos` - native browser - [`webkit`]
  * `silk` - Amazon Kindle browser  - [`webkit`]
  * `bada` - [`webkit`]
  * `tizen` - [`webkit`]
  * `seamonkey` - [`gecko`]
  * `sailfish` - [`gecko`]
  * `ucbrowser` — [`webkit`]
  * `qupzilla` — [`webkit`]
  * `vivaldi` — [`blink`]
  * `sleipnir` — [`blink`]
  * `kMeleon` — [`gecko`]
  * `whale` — [`blink`]

For all detected browsers the browser version is set in the `version` field.

### OS Flags
If detected, one of these flags may be set to true:

  * `mac`
  * `windows` - other than Windows Phone
  * `windowsphone`
  * `linux` - other than `android`, `chromeos`, `webos`, `tizen`, and `sailfish`
  * `chromeos`
  * `android`
  * `ios` - also sets one of `iphone`/`ipad`/`ipod`
  * `blackberry`
  * `firefoxos`
  * `webos` - may also set `touchpad`
  * `bada`
  * `tizen`
  * `sailfish`

`osname` and `osversion` may also be set:

  * `osname` - for the OS flags detected above: macOS, Windows, Windows Phone, Linux, Chrome OS, Android, iOS, Blackberry OS, Firefox OS, WebOS, Bada, Tizen, Sailfish OS, and Xbox
  * `osversion` - for Android, iOS, MacOS, Windows, Windows Phone, WebOS, Bada, and Tizen.  If included in UA string.

iOS is always reported as `ios` and additionally as `iphone`/`ipad`/`ipod`, whichever one matches best.
If WebOS device is an HP TouchPad the flag `touchpad` is additionally set.

### Browser capability grading
One of these flags may be set:

  * `a` - This browser has full capabilities
  * `c` - This browser has degraded capabilities.  Serve simpler version
  * `x` - This browser has minimal capabilities and is probably not well detected.

There is no `b`.  For unknown browsers, none of these flags may be set.

### Ender Support

`package.json`

``` json
"dependencies": {
  "bowser": "x.x.x"
}
```

``` js
if (require('bowser').chrome) {
  alert('Hello Silicon Valley')
}
```

### Contributing
If you'd like to contribute a change to bowser, modify the files in `src/`, then run the following (you'll need node + npm installed):

``` sh
$ npm install
$ make test
```

Please do not check-in the built files `bowser.js` and `bowser.min.js` in pull requests.

### Adding tests
See the list in `src/useragents.js` with example user agents and their expected bowser object.

Whenever you add support for new browsers or notice a bug / mismatch, please update the list and
check if all tests are still passing.

### Similar Projects
* [Kong](https://github.com/BigBadBleuCheese/Kong) - A C# port of Bowser.

### License
Licensed as MIT. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE file for more details.