browser.coffee

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browser.coffee

Override exported methods for non-Node.js engines.

CoffeeScript = require './coffee-script'
CoffeeScript.require = require

Use standard JavaScript eval to eval code.

CoffeeScript.eval = (code, options = {}) ->
  options.bare ?= on
  eval CoffeeScript.compile code, options

Running code does not provide access to this scope.

CoffeeScript.run = (code, options = {}) ->
  options.bare = on
  Function(CoffeeScript.compile code, options)()

¶

If we're not in a browser environment, we're finished with the public API.
```
return unless window?
```

Load a remote script from the current domain via XHR.

CoffeeScript.load = (url, callback, options = {}) ->
  xhr = if window.ActiveXObject
    new window.ActiveXObject('Microsoft.XMLHTTP')
  else
    new XMLHttpRequest()
  xhr.open 'GET', url, true
  xhr.overrideMimeType 'text/plain' if 'overrideMimeType' of xhr
  xhr.onreadystatechange = ->
    if xhr.readyState is 4
      if xhr.status in [0, 200]
        CoffeeScript.run xhr.responseText, options
      else
        throw new Error "Could not load #{url}"
      callback() if callback
  xhr.send null

Activate CoffeeScript in the browser by having it compile and evaluate all script tags with a content-type of text/coffeescript. This happens on page load.

runScripts = ->
  scripts = document.getElementsByTagName 'script'
  coffeetypes = ['text/coffeescript', 'text/literate-coffeescript']
  coffees = (s for s in scripts when s.type in coffeetypes)
  index = 0
  length = coffees.length
  do execute = ->
    script = coffees[index++]
    mediatype = script?.type
    if mediatype in coffeetypes
      options = {literate: mediatype is 'text/literate-coffeescript'}
      if script.src
        CoffeeScript.load script.src, execute, options
      else
        CoffeeScript.run script.innerHTML, options
        execute()
  null

Listen for window load, both in browsers and in IE.

if window.addEventListener
  addEventListener 'DOMContentLoaded', runScripts, no
else
  attachEvent 'onload', runScripts