util.coffee.md

Util

module.exports =
  approach: (current, target, amount) ->
    (target - current).clamp(-amount, amount) + current

Apply a stylesheet idempotently.

  applyStylesheet: (style, id="primary") ->
    styleNode = document.createElement("style")
    styleNode.innerHTML = style
    styleNode.id = id

    if previousStyleNode = document.head.querySelector("style##{id}")
      previousStyleNode.parentNode.removeChild(prevousStyleNode)

    document.head.appendChild(styleNode)

  defaults: (target, objects...) ->
    for object in objects
      for name of object
        unless target.hasOwnProperty(name)
          target[name] = object[name]

    return target

  extend: (target, sources...) ->
    for source in sources
      for name of source
        target[name] = source[name]

    return target