右键单击ClojureScript?
谁能告诉我如何在Clojure中生成右键单击事件处理程序?我熟悉“:on click”用于简单单击,但不适用于右键或双击。似乎无法在网上找到任何有用的资源。谢谢 使用右键单击ClojureScript?,clojure,mouseevent,clojurescript,Clojure,Mouseevent,Clojurescript,谁能告诉我如何在Clojure中生成右键单击事件处理程序?我熟悉“:on click”用于简单单击,但不适用于右键或双击。似乎无法在网上找到任何有用的资源。谢谢 使用om我得到了右键单击作为上下文菜单事件。右按钮的按钮编号为2: {:onContextMenu (fn [e] (prn e (.-button e)))} 或者在纯html+cljs中: <div id="btn">Click me</div> (.addE
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我得到了右键单击作为上下文菜单事件。右按钮的按钮编号为2:
{:onContextMenu (fn [e]
(prn e (.-button e)))}
或者在纯html+cljs中:
<div id="btn">Click me</div>
(.addEventListener (.getElementById js/document "btn")
"contextmenu" (fn [e] (prn e (.-button e))))
点击我
(.addEventListener(.getElementById js/document“btn”)
“上下文菜单”(fn[e](prn e(.-按钮e)))
在ClojureScript中,经常使用Google闭包库()代替原始JS。命名空间包含枚举,枚举指定每个单独的事件类型:
(ns test.core
(:require [goog.dom :as dom]
[goog.events :as events]))
(letfn [(menu-listener [event]
(.log js/console (str "contextmenu " (.-button event))))
(click-listener [event]
(let [btn (.-button event)
msg (if (= btn 2) "Right-click" (str "Button " btn))]
(.log js/console msg)))]
(events/listen (dom/getElement "click-target") "contextmenu" menu-listener)
(events/listen (dom/getElement "click-target") "click" click-listener))
;; src/test/core.cljs
右键菜单
右键单击我
注意:
- 右键单击(按钮2)将触发
侦听器。上下文菜单
侦听器无法看到它(即使没有单击
侦听器)上下文菜单
- 第二次右键单击将关闭上下文菜单,但两个侦听器都不会被触发
<!DOCTYPE html>
<html>
<head>
<title>contextmenu</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<p id="click-target">Right click on me</p>
<script src="out/test.js" type="text/javascript"></script>
</body>
</html>
<!-- index.html -->