Vue组件、使用方法都在代码里了。效果如下：
附上所有代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="https://cdn.bootcss.com/vue/2.5.13/vue.min.js"></script>
<link href="https://cdn.bootcss.com/bulma/0.6.1/css/bulma.min.css" rel="stylesheet">
<style>
.tags-input > ul {
height: 16rem;
overflow-y: scroll;
border: 1px solid #ccc;
}
.tags-input li {
padding: .25rem 1rem;
}
.tags-input li:hover {
color: white;
background: blue;
}
</style>
<title>Document</title>
</head>
<body>
<div class="section" id="app">
<tag-input :tags="tags" max="3"></tag-input>
</div>
<script>
Vue.component('tag-input', Vue.extend({
props: ['tags', 'max'],
template: '<div class="tags-input"><div class="input field is-grouped" v-on:click="popup=true" style="margin-bottom:0"><div class="control" v-for="(item,i) in selected" v-on:click.stop=""><div class="tags has-addons is-medium"><span class="tag is-link">{{ item }}</span><a v-on:click="move(item,false);" class="tag is-delete"></a></div></div></div><ul class="is-hoverable" v-show="popup"><li v-for="tag in tags" v-on:click="move(tag,true);popup=false;">{{ tag }}</li></ul></div>"tag in tags" v-on:click="move(tag,true);popup=false;">{{ tag }}</li></ul></div>',
data: function () {
return {
popup: false,
selected: [],
};
},
methods: {
move: function(item, flag) {
var from = flag ? this.tags : this.selected;
var to = flag ? this.selected : this.tags;
if (!flag || to.length < this.max) {
from.splice(from.indexOf(item), 1);
to.push(item);
}
},
}
}));
new Vue({
el: '#app',
data: {
tags: [
'标签1',
'标签2',
'标签3',
'标签4',
'标签5',
'标签6',
'标签7',
'标签8',
'标签9',
'标签10',
'标签11',
'标签12',
]
}
});
</script>
</body>
</html>