isbot-fast ·  

The isbot-fast package is needed to quickly identify most bots/crawlers/spiders using a user-agent. It runs more than 10 times faster than the isbot package.

In addition to the search bots, isbot-fast identifies:
* bots of social networks and instant messengers
* preview bots receiving meta-information about the page
* some scanners and monitoring
* content downloaders

Note: the purpose of the package is not to determine absolutely all bots, since this will significantly slow down the speed of work. isbot-fast probably determines 99.5% of all requests sent by bots at the moment. If you want to identify even more existing bots, then pay attention to the isbot package.

The result of the function is a boolean value.

Installation

``sh
npm install isbot-fast --save
`

Usage

`js
const isBot = require('isbot-fast');

isBot('Googlebot/2.1 (+http://www.google.com/bot.html)');
// true

isBot('Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14');
// false
`

Extending

If you want to maintain performance and exclude some bots that bother you, then add these bots to the additional exclusion list as shown in the example below.

`js
const isBot = require('isbot-fast');

isBot('W3C_Validator/1.3');
// false

isBot.extend(['validator', 'image']);

isBot('W3C_Validator/1.3');
// true
`

Use case

`js
const isBot = require('isbot-fast');
const ua = req.headers['user-agent'] || '';

if (isBot(ua)) {
// Provide static page for spiders when you have a single page app
} else {
// Making cookies
}
`

License

isbot-fast` is MIT licensed.