vue教程2-08 自定义键盘信息
@keydown.up
@keydown.enter
@keydown.a/b/c....
自定义键盘信息:
Vue.directive(‘on‘).keyCodes.ctrl=17;
Vue.directive(‘on‘).keyCodes.myenter=13;
@keydown.a/b/c....
<input type="text" @keydown.c="show">
自定义键盘信息:
Vue.directive(‘on‘).keyCodes.ctrl=17;
Vue.directive(‘on‘).keyCodes.myenter=13;
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
</style>
<script src="vue.js"></script>
<script>
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 | debounce 2000">
</div>
</body>
</html>
监听数据变化:
vm.$el/$mount/$options/....
vm.$watch(name,fnCb); //浅度
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script src="vue.js"></script>
<script>
window.onload=function(){
var vm=new Vue({
el:‘#box‘,
data:{
json:{name:‘strive‘,age:16},
b:2
}
});
vm.$watch(‘json‘,function(){
alert(‘发生变化了‘);//浅监听，json里面某个属性变，是不会监听到的
});
document.onclick=function(){
vm.json.name=‘aaa‘;
};
};
</script>
</head>
<body>
<div id="box">
{{json | json}}//json过滤相当于 JSON.string
<br>
{{b}}
</div>
</body>
</html>
vm.$watch(name,fnCb,{deep:true}); //深度监视
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script src="vue.js"></script>
<script>
window.onload=function(){
var vm=new Vue({
el:‘#box‘,
data:{
json:{name:‘strive‘,age:16},
b:2
}
});
vm.$watch(‘json‘,function(){
alert(‘发生变化了‘);
},{deep:true});
document.onclick=function(){
vm.json.name=‘aaa‘;
};
};
</script>
</head>
<body>
<div id="box">
{{json | json}}
<br>
{{b}}
</div>
</body>
</html>
时间： 2024-11-03 22:15:46