1.练习网址:https://jsfiddle.net/chrisvfritz/50wL7mdz/
2.html代码:
<script src="https://unpkg.com/vue"></script>
<div id="app">
<p>{{ message }}</p>
</div>
<div id="example-1">
<button v-on:click="counter += 1">Add 1</button>
<p>The button above has been clicked {{ counter }} times.</p>
<div v-if="counter%3 === 1">
<lable style="background-color:green">green</lable>
</div>
<div v-else-if="counter%3 === 2">
<lable style="background-color:blue">blue</lable>
</div>
<div v-else-if="counter%3 === 0">
<lable style="background-color:pink">pink</lable>
</div>
<div v-else>
Not A/B/C
</div>
</div>
<p>/////////////////////////////////////////////////////</p>
<div id="todo-list-example">
<form v-on:submit.prevent="addNewTodo">
<label for="new-todo">Add a todo</label>
<input
v-model="newTodoText"
id="new-todo"
placeholder="E.g. Feed the cat"
>
<button>Add</button>
</form>
<ul>
<li
is="todo-item"
v-for="(todo, index) in todos"
v-bind:key="todo.id"
v-bind:id="todo.id"
v-bind:title="todo.title"
v-on:remove="todos.splice(index, 1)"
>
</li>
</ul>
</div>
2.js代码:
new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!'
}
})
var example1 = new Vue({
el: '#example-1',
data: {
counter: 0,
type:4
}
})
Vue.component('todo-item', {
template: '\
<li>\
{{ id }} .{{ title }}\
<button v-on:click="$emit(\'remove\')">Remove</button>\
</li>\
',
props: ['id','title']
})
new Vue({
el: '#todo-list-example',
data: {
newTodoText: '',
todos: [
{
id: 1,
title: 'Do the dishes',
},
{
id: 2,
title: 'Take out the trash',
},
{
id: 3,
title: 'Mow the lawn'
}
],
nextTodoId: 4
},
methods: {
addNewTodo: function () {
this.todos.push({
id: this.nextTodoId++,
title: this.newTodoText
})
this.newTodoText = ''
}
}
})
3.效果图: