在liftweb 中扩展一个类似 jQuery的方法：$("...").XXX() 和 jQuery("...").XXX()。

gistfile1.scala

package yangbajing.util.web

import scala.xml.{ NodeSeq, Text, Elem }

import net.liftweb.http.js.{ JsExp, JE, JsMember, JsCmd, JsCmds }
import net.liftweb.http.js.jquery.{ JqJE, JqJsCmds }
import net.liftweb.util.StringHelpers._

object jQuery {
  def apply(exp: String): jQuery = apply(JE.Str(exp))
  
  def apply(exp: JsExp): jQuery = new jQuery(exp)
}

class jQuery(exp: JsExp) {
  val jq = JqJE.Jq(exp)

  def html(content: NodeSeq) =
    (jq ~> JqJE.JqHtml(content)).cmd

  def html() =
    (jq ~> JqJE.JqHtml()).cmd

  def append(content: NodeSeq) =
    (jq ~> JqJE.JqAppend(content)).cmd

  def appendTo(content: NodeSeq) =
    (jq ~> JqJE.JqAppendTo(content)).cmd

  def prepared(content: NodeSeq) =
    (jq ~> JqJE.JqPrepend(content)).cmd

  def preparedTo(content: NodeSeq) =
    (jq ~> JqJE.JqPrependTo(content)).cmd

  def value(value: JsExp) =
    (jq ~> SetValue(value)).cmd

  def value() =
    (jq ~> Value()).cmd

  def attr(key: String) =
    (jq ~> JqJE.JqGetAttr(key)).cmd

  def attr(key: String, value: JsExp) =
    (jq ~> JqJE.JqAttr(key, value)).cmd

  def removeAttr(key: String) =
    (jq ~> RemoveAttr(key)).cmd

  def getClass(key: String) =
    (jq ~> JqJE.JqGetAttr(key)).cmd

  def setClass(value: JsExp) =
    attr("class", value)

  def remove() =
    (jq ~> JqJE.JqRemove()).cmd

  private case class RemoveAttr(key: String) extends JsExp with JsMember {
    def toJsCmd = "removeAttr(" + key.encJs + ")"
  }

  private case class SetValue(value: JsExp) extends JsExp with JsMember {
    def toJsCmd = "val(" + value.toJsCmd + ")"
  }

  private case class Value() extends JsExp with JsMember {
    def toJsCmd = "val()"
  }
}

Thank you