vue阻止事件-原创手记-慕课网

1.事情对象

<!DOCTYPE html><html><head>    <title></title>    <meta charset="utf-8">    <script src="http://unpkg.com/vue/dist/vue.js"></script>    <script type="text/javascript">        window.onload = function(){            var vm = new Vue({                el:'#box',                methods:{                    show:function(event){                        console.log(event);   //event   这个就是事件对象了                    }                }            });        }    </script></head><body>   <div id="box">        <input type="button" value="按钮" @click="show($event)">     </div></body></html>

通过show($event)把事件对象传到方法里

2.事件冒泡

<!DOCTYPE html><html><head>    <title></title>    <meta charset="utf-8">    <script src="http://unpkg.com/vue/dist/vue.js"></script>    <script type="text/javascript">        window.onload = function(){            var vm = new Vue({                el:'#box',                methods:{                    show:function(){                        alert(1);                    },                    show1:function(){                        alert(2);                    }                }            });        }    </script></head><body>    <div id="box">        <div @click="show1()">            <input type="button" value="按钮" @click="show()">         </div>    </div></body></html>

点击按钮的话他会，执行show ,show1方法，依次弹出1，2。

怎么来阻止

<1> 利用我们上面讲过的event对象: event.cancelBubble = true; //这种就阻止了

<!DOCTYPE html><html><head>    <title></title>    <meta charset="utf-8">    <script src="http://unpkg.com/vue/dist/vue.js"></script>    <script type="text/javascript">        window.onload = function(){            var vm = new Vue({                el:'#box',                methods:{                    show:function(event){                        alert(1);                        event.cancelBubble = true;                    },                    show1:function(){                        alert(2);                    }                }            });        }    </script></head><body>   <div id="box">        <div @click="show1()">            <input type="button" value="按钮" @click="show($event)">         </div>    </div></body></html>

<2>利用vue的方法阻止冒泡：给HTML元素绑定click事件的时候，改为@click.stop="show()"

<!DOCTYPE html><html><head>    <title></title>    <meta charset="utf-8">    <script src="http://unpkg.com/vue/dist/vue.js"></script>    <script type="text/javascript">        window.onload = function(){            var vm = new Vue({                el:'#box',                methods:{                    show:function(event){                        alert(1);                        //event.cancelBubble = true;                    },                    show1:function(){                        alert(2);                    }                }            });        }    </script></head><body>    <div id="box">        <div @click="show1()">            <input type="button" value="按钮" @click.stop="show()">         </div>    </div></body></html>

3.默认行为

比如contextmenu右键菜单

<!DOCTYPE html><html><head>    <title></title>    <meta charset="utf-8">    <!-- // <script src="vue.js"></script> -->    <script src="http://unpkg.com/vue/dist/vue.js"></script>    <script type="text/javascript">        window.onload = function(){            var vm = new Vue({                el:'#box',                methods:{                    show:function(){                        alert(1);                    },                    show1:function(){                        alert(2);                    }                }            });        }    </script></head><body>    <div id="box">        <input type="button" value="按钮" @contextmenu="show()">         <input type="button" value="按钮1" @contextmenu.prevent="show1()">         <p>//按钮右击点下去会依次出现 弹窗 1， 还有右击的默认菜单</p>        <p>//按钮1右击只出现 弹窗 2</p>    </div></body></html>

@click.stop.prevent，相当于同时执行：
event.stopPropagation();
event.preventDefault();