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# 设置快捷键
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[![](https://img.shields.io/github/issues/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/issues) [![](https://img.shields.io/github/forks/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/network) [![](https://img.shields.io/github/stars/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/stargazers) [![](https://img.shields.io/github/release/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/releases) [![jaywcjlove/sb](https://jaywcjlove.github.io/sb/lang/chinese.svg)](http://jaywcjlove.github.io/hotkeys/?lang=cn) [![jaywcjlove/sb](https://jaywcjlove.github.io/sb/lang/english.svg)](http://jaywcjlove.github.io/hotkeys/?lang=en)
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这是一个强健的 Javascript 库用于捕获键盘输入和输入的组合键,它没有依赖,压缩只有只有(~3kb)。`hotkey`是临摹大师[madrobby/keymaster](https://github.com/madrobby/keymaster)的作品,只是做了少许更改,添加UMD,和兼容问题。没有`fork`的原因是,不仅仅要一句一句的读懂,还要体现出临摹的作用。
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[官方文档DEMO预览](http://jaywcjlove.github.io/hotkeys/)
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```
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__ __ __
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| |--..-----.| |_ | |--..-----..--.--..-----.
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| || _ || _|| < | -__|| | ||__ --|
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|__|__||_____||____||__|__||_____||___ ||_____|
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|_____|
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```
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## 创建
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您将需要在您的系统上安装的 Node.js。
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```sh
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# bower 安装
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$ bower install hotkeysjs
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# npm 安装
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$ npm install hotkeys-js
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$ npm run build # 编译
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$ npm run watch # 开发模式
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```
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## 使用
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传统调用
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```
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<script type="text/javascript" src="./js/hotkeys.js"></script>
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```
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包加载
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```js
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import hotkeys from 'hotkeys-js';
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hotkeys('shift+a,alt+d, w', function(e){
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console.log('干点活儿',e);
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if(hotkeys.shift) console.log('大哥你摁下了 shift 键!');
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if(hotkeys.ctrl) console.log('大哥你摁下了 ctrl 键!');
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if(hotkeys.alt) console.log('大哥你摁下了 alt 键!');
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});
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```
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## 定义快捷键
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```js
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// 定义a快捷键
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hotkeys('a', function(event,handler){
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//event.srcElement: input
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//event.target: input
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if(event.target === "input"){
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alert('你在输入框中按下了 a!')
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}
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alert('你按下了 a!')
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});
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// 定义a快捷键
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hotkeys('ctrl+a,ctrl+b,r,f', function(event,handler){
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switch(handler.key){
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case "ctrl+a":alert('你按下了ctrl+a!');break;
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case "ctrl+b":alert('你按下了ctrl+b!');break;
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case "r":alert('你按下了r!');break;
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case "f":alert('你按下了f!');break;
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}
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//handler.scope 范围
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});
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// 返回false将停止活动,并阻止默认浏览器事件
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hotkeys('ctrl+r', function(){ alert('停止刷新!'); return false });
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// 多个快捷方式做同样的事情
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hotkeys('⌘+r, ctrl+r', function(){ });
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// 对所有摁键执行任务
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hotkeys('*','wcj', function(e){
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console.log('干点活儿',e);
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console.log("key.getScope()::",hotkeys.getScope());
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if(hotkeys.shift) console.log('大哥你摁下了 shift 键!');
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if(hotkeys.ctrl) console.log('大哥你摁下了 ctrl 键!');
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if(hotkeys.alt) console.log('大哥你摁下了 alt 键!');
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});
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```
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## 支持的键
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`⇧`, `shift`, `option`, `⌥`, `alt`, `ctrl`, `control`, `command`, `⌘`。
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`⌘` Command()
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`⌃` Control
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`⌥` Option(alt)
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`⇧` Shift
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`⇪` Caps Lock(大写)
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`fn` 功能键就是fn(不支持)
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`↩︎` return/Enter
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`space` 空格键
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## 修饰键判断
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可以对下面的修饰键判断 `shift` `alt` `option` `ctrl` `control` `command`,特别注意`+`和`=`键值相同,组合键设置`⌘+=`
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```js
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hotkeys('shift+a,alt+d, w', function(e){
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console.log('干点活儿',e);
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if(hotkeys.shift) console.log('大哥你摁下了 shift 键!');
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if(hotkeys.ctrl) console.log('大哥你摁下了 ctrl 键!');
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if(hotkeys.alt) console.log('大哥你摁下了 alt 键!');
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});
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```
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## 切换快捷键
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如果在单页面在不同的区域,相同的快捷键,干不同的事儿,之间来回切换。O(∩_∩)O !
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```js
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// 一个快捷键,有可能干的活儿不一样哦
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hotkeys('ctrl+o, ctrl+alt+enter', 'scope1', function(){
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console.log('你好看');
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});
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hotkeys('ctrl+o, enter', 'scope2', function(){
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console.log('你好丑陋啊!');
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});
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// 你摁 “ctrl+o”组合键
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// 当scope等于 scope1 ,执行 回调事件打印出 “你好看”,
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// 当scope等于 scope2 ,执行 回调事件打印出 “你好丑陋啊!”,
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// 通过setScope设定范围scope
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hotkeys.setScope('scope1'); // 默认所有事儿都干哦
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```
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## 删除标记快捷键
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删除区域范围标记
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```js
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hotkeys.deleteScope('issues');
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```
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## 解除绑定
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`hotkeys.unbind("ctrl+o, ctrl+alt+enter")` 解除绑定两组快捷键
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`hotkeys.unbind("ctrl+o","files")` 解除绑定名字叫files钟的一组快捷键
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## 键判断
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判断摁下的键是否为某个键
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```js
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hotkeys('a', function(){
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console.log(hotkeys.isPressed("A")); //=> true
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console.log(hotkeys.isPressed(65)); //=> true
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});
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```
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## 获取摁下键值
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获取摁下绑定键的键值 `hotkeys.getPressedKeyCodes()`
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```js
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hotkeys('command+ctrl+shift+a,f', function(){
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console.log(hotkeys.getPressedKeyCodes()); //=> [17, 65] 或者 [70]
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})
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```
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## 过滤
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`INPUT` `SELECT` `TEXTAREA` 默认不处理。
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`hotkeys.filter` 返回 `true` 快捷键设置才会起作用,`flase` 快捷键设置失效。
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```javascript
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hotkeys.filter = function(event){
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return true;
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}
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//如何增加过滤可编辑标签 <div contentEditable="true"></div>
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//contentEditable老浏览器不支持滴
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hotkeys.filter = function(event) {
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var tagName = (event.target || event.srcElement).tagName;
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return !(tagName.isContentEditable ||
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tagName == 'INPUT' ||
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tagName == 'SELECT' ||
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tagName == 'TEXTAREA');
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}
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//
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hotkeys.filter = function(event){
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var tagName = (event.target || event.srcElement).tagName;
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hotkeys.setScope(/^(INPUT|TEXTAREA|SELECT)$/.test(tagName) ? 'input' : 'other');
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return true;
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}
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```
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## 兼容模式
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```js
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var k = hotkeys.noConflict();
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k('a', function() {
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console.log("这里可以干一些事儿")
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});
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hotkeys()
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// -->Uncaught TypeError: hotkeys is not a function(anonymous function)
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// @ VM2170:2InjectedScript._evaluateOn
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// @ VM2165:883InjectedScript._evaluateAndWrap
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// @ VM2165:816InjectedScript.evaluate @ VM2165:682
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```
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