vue視頻： 自定義指令 && 拖拽 && 自定義鍵盤信息
阿新 • • 發佈：2018-10-07
dfa 數據 top sta option box -s con v-for 
v-text
v-for
v-html
指令: 擴展html語法
自定義指令:
1. 自定義屬性指令:
Vue.directive(指令名稱,function(參數){ this.el -> 原生DOM元素 // vm.$el }); <div v-red="參數"></div>
指令名稱: v-red -> red
* 註意: 必須以 v-開頭（定義時去掉v-）
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <Vue.directive(‘red‘,function(color){})title>智能社——http://www.zhinengshe.com</title> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black"> <style> </style> <script src="vue.js"></script> <script> Vue.directive(‘red‘,function(color){ this.el.style.background=color; }); window.onload=function(){ var vm=new Vue({ el:‘#box‘, data:{ a:‘blue‘ } }); }; </script> </head> <body> <div id="box"> <span v-red="a"> asdfasd </span> </div> </body> </html>
demo：拖拽
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>智能社——http://www.zhinengshe.com</title> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black"> <style> </style> <script src="vue.js"></script> <script> Vue.directive(‘drag‘,function(){ var oDiv=this.el; oDiv.onmousedown=function(ev){ var disX=ev.clientX-oDiv.offsetLeft; var disY=ev.clientY-oDiv.offsetTop; document.onmousemove=function(ev){ var l=ev.clientX-disX; var t=ev.clientY-disY; oDiv.style.left=l+‘px‘; oDiv.style.top=t+‘px‘; }; document.onmouseup=function(){ document.onmousemove=null; document.onmouseup=null; }; }; }); window.onload=function(){ var vm=new Vue({ el:‘#box‘, data:{ msg:‘welcome‘ } }); }; </script> </head> <body> <div id="box"> <div v-drag :style="{width:‘100px‘, height:‘100px‘, background:‘blue‘, position:‘absolute‘, right:0, top:0}"></div> <div v-drag :style="{width:‘100px‘, height:‘100px‘, background:‘red‘, position:‘absolute‘, left:0, top:0}"></div> </div> </body> </html>ev.clientX-oDiv.offsetLeft
2.自定義元素指令:（用處不大）
Vue.elementDirective(‘zns-red‘,{ bind: function(){ this.el.style.background=‘red‘; } });
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@keydown.up
@keydown.enter
@keydown.a/b/c....
自定義鍵盤信息:
Vue.directive(‘on‘).keyCodes.ctrl=17;
Vue.directive(‘on‘).keyCodes.myenter=13;
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>智能社——http://www.zhinengshe.com</title> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black"> <style> </style> <script src="vue.js"></script> <script> //ctrl->17 /*document.onkeydown=function(ev){ console.log(ev.keyCode); };*/ Vue.directive(‘on‘).keyCodes.ctrl=17; // Vue.directive(‘on‘).keyCodes.myenter=13; window.onload=function(){ var vm=new Vue({ el:‘#box‘, data:{ a:‘blue‘ }, methods:{ show:function(){ alert(1); } } }); }; </script> </head> <body> <div id="box"> <input type="text" @keydown.myenter="show"> </div> </body> </html>Vue.directive(‘on‘).keyCodes.myenter=13;
監聽數據變化: vm.$el/$mount/$options/.... vm.$watch(name,fnCb); //淺度 vm.$watch(name,fnCb,{deep:true}); //深度監視
vue視頻： 自定義指令 && 拖拽 && 自定義鍵盤信息