Vue.directive(指令名称,function(参数){ this.el -> 原生DOM元素 });
<div v-red="参数"></div>
指令名称: v-red -> red
* 注意: 必须以 v-开头
拖拽:
二、自定义元素指令:（用处不大）
Vue.elementDirective('zns-red',{ bind:function(){ this.el.style.background='red'; } });
自定义指令写法一：
<div> <span v-red> asdfasd </span> </div>
Vue.directive('red',function(){ this.el.style.background='red'; }); window.onload=function(){ var vm=new Vue({ el:'#box', data:{ msg:'welcome' } }); };
测试示例：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title> 自定义指令写法一</title> <script src="https://cdn.bootcss.com/vue/1.0.4/vue.min.js"></script> <script> Vue.directive('red',function(){ this.el.style.background='red'; }); window.onload=function(){ var vm=new Vue({ el:'#box', data:{ msg:'welcome' } }); }; </script> </head> <body> <div> <span v-red> asdfasd </span> </div> </body> </html>
自定义指令写法二：推荐写法
<div> <span v-red="a"> asdfasd </span> </div>
//这里的color可以传参 Vue.directive('red',function(color){ this.el.style.background=color; }); window.onload=function(){ var vm=new Vue({ el:'#box', data:{ a:'blue' } }); };
测试示例：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title> 自定义指令写法二</title> <script src="https://cdn.bootcss.com/vue/1.0.4/vue.min.js"></script> <script> //这里的color可以传参 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> <span v-red="a"> asdfasd </span> </div> </body> </html>
自定义指令写法三：
<div> <span v-red> asdfasd </span> </div>
Vue.directive('red',{ bind:function(){ this.el.style.background='red'; } }); window.onload=function(){ var vm=new Vue({ el:'#box' }); };
自定义指令：拖拽drag
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title> 自定义指令：拖拽drag</title> <script src="https://cdn.bootcss.com/vue/1.0.4/vue.min.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> <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>
自定义元素指令
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title> 自定义元素指令</title> <style> zns-red{ width:100px; background: gray; height:100px; display: block; } </style> <script src="https://cdn.bootcss.com/vue/1.0.4/vue.min.js"></script> <script> Vue.elementDirective('zns-red',{ bind:function(){ this.el.style.background='red'; } }); window.onload=function(){ var vm=new Vue({ el:'#box', data:{ a:'blue' } }); }; </script> </head> <body> <div> <zns-red></zns-red> </div> </body> </html>