pjax/lib/eval-script.js

module.exports = function(el) {
  var code = (el.text || el.textContent || el.innerHTML || "")
  var src = (el.src || "")
  var parent = el.parentNode || document.querySelector("head") || document.documentElement
  var script = document.createElement("script")

  if (code.match("document.write")) {
    if (console && console.log) {
      console.log("Script contains document.write. Can’t be executed correctly. Code skipped ", el)
    }
    return false
  }

  script.type = "text/javascript"

  /* istanbul ignore if */
  if (src !== "") {
    script.src = src
    script.async = false // force synchronous loading of peripheral JS
  }

  if (code !== "") {
    try {
      script.appendChild(document.createTextNode(code))
    }
    catch (e) {
      /* istanbul ignore next */
      // old IEs have funky script nodes
      script.text = code
    }
  }

  // execute
  parent.appendChild(script)
  // avoid pollution only in head or body tags
  if (parent instanceof HTMLHeadElement || parent instanceof HTMLBodyElement) {
    parent.removeChild(script)
  }

  return true
}