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connect-livereload

v0.6.1

Published

connect middleware for adding the livereload script to the response

Downloads

1,236,314

Readme

connect-livereload

connect middleware for adding the livereload script to the response. no browser plugin is needed. if you are happy with a browser plugin, then you don't need this middleware.

NPM

Build Status Coverage Status

install

npm install connect-livereload --save-dev

use

note: if you use this middleware, you should make sure to switch off the Browser LiveReload Extension if you have it installed.

this middleware can be used with a LiveReload module e.g. grunt-contrib-connect or grunt-contrib-watch.

connect-livereload itself does not serve the livereload.js script.

In your connect or express application add this after the static and before the dynamic routes. If you need liveReload on static html files, then place it before the static routes. ignore gives you the possibility to ignore certain files or url's from being handled by connect-livereload.

connect/express example

  app.use(require('connect-livereload')({
    port: 35729
  }));

please see the examples for the app and Grunt configuration.

options

Options are not mandatory: app.use(require('connect-livereload')()); The Options have to be provided when the middleware is loaded:

e.g.:

  app.use(require('connect-livereload')({
    port: 35729,
    ignore: ['.js', '.svg']
  }));

These are the available options with the following defaults:

  // `ignore` and `include`: array with strings and regex expressions elements.
  // strings: included/ignored when the url contains this string
  // regex: any expression: e.g. starts with pattern: /^.../ ends with pattern: /...$/
  ignore: [
    /\.js(\?.*)?$/, /\.css(\?.*)?$/, /\.svg(\?.*)?$/, /\.ico(\?.*)?$/, /\.woff(\?.*)?$/,
    /\.png(\?.*)?$/, /\.jpg(\?.*)?$/, /\.jpeg(\?.*)?$/, /\.gif(\?.*)?$/, /\.pdf(\?.*)?$/
  ],

  // include all urls by default
  include: [/.*/],

  // this function is used to determine if the content of `res.write` or `res.end` is html.
  html: function (str) {
    if (!str) return false;
    return /<[:_-\w\s\!\/\=\"\']+>/i.test(str);
  },

  // rules are provided to find the place where the snippet should be inserted.
  // the main problem is that on the server side it can be tricky to determine if a string will be valid html on the client.
  // the function `fn` of the first `match` is executed like this `body.replace(rule.match, rule.fn);`
  // the function `fn` has got the arguments `fn(w, s)` where `w` is the matches string and `s` is the snippet.
  rules: [{
    match: /<\/body>(?![\s\S]*<\/body>)/i,
    fn: prepend
  }, {
    match: /<\/html>(?![\s\S]*<\/html>)/i,
    fn: prepend
  }, {
    match: /<\!DOCTYPE.+?>/i,
    fn: append
  }],

  // port where the script is loaded
  port: 35729,

  // location where the script is provided (not by connect-livereload). Change this e.g. when serving livereload with a proxy.
  src: "http://localhost:35729/livereload.js?snipver=1",

  // Set this option to `true` to set `req.headers['accept-encoding']` to 'identity' (disabling compression)
  disableCompression: false,

  // Locations where livereload plugins are provided (not by connect-livereload).
  // These plugins should handle being loaded before _or_ after the livereload
  // script itself (the order is not guaranteed), like
  // https://github.com/mixmaxhq/livereload-require-js-includes/blob/5a431793d6fdfcf93d66814ddc58338515a3254f/index.js#L40-L45
  plugins: [
    "http://localhost:3001/livereload-require-js-includes/index.js"
  ]

please see the examples for the app and Grunt configuration.

grunt example

The following example is from an actual Gruntfile that uses grunt-contrib-connect

connect: {
  options: {
    port: 3000,
    hostname: 'localhost'
  },
  dev: {
    options: {
      middleware: function (connect) {
        return [
          require('connect-livereload')(), // <--- here
          checkForDownload,
          mountFolder(connect, '.tmp'),
          mountFolder(connect, 'app')
        ];
      }
    }
  }
}

For use as middleware in grunt simply add the following to the top of your array of middleware.

  require('connect-livereload')(),

You can pass in options to this call if you do not want the defaults.

dev is simply the name of the server being used with the task grunt connect:dev. The other items in the middleware array are all functions that either are of the form function (req, res, next) like checkForDownload or return that like mountFolder(connect, 'something').

alternative

An alternative would be to install the LiveReload browser plugin.

credits

tests

run the tests with

mocha

license

MIT License