我有一个布局,可以循环获取文本字段和按钮。如何在按钮上添加功能,以便仅清除其相应字段。 在这里查看小提琴。
https://jsfiddle.net/pu4ht2gb/7/
<div id="app">
<h2>Each text with it's own state and clear should clear the respective
text fields</h2>
<ul v-for="todo in todos">
<li>
<input type="text" :placeholder="`${todo.text}`">
</li>
<li>
<input type="text" :placeholder="`${todo.text1}`">
</li>
<button>Clear</button>
</ul>
new Vue({
el: "#app",
data: {
todos: [
{ text: "Learn JavaScript", text1:"Hey" },
{ text: "Learn Vue", text1:"Hello" },
{ text: "Play around in JSFiddle", text1:"Ciao" },
{ text: "Build something awesome", text1:"Something"}
]
}
})
答案 0 :(得分:1)
您确实应该浏览https://vuejs.org/v2/上的文档
您缺少实现目标的许多基本构造函数。首先,您需要将click事件添加到您的按钮中。 (https://vuejs.org/v2/guide/events.html)
接下来,您需要在渲染(https://vuejs.org/v2/guide/list.html)时参考待办事项的索引
您可以在此处创建一个名为clear的简单方法:
new Vue({
el: "#app",
data: {
todos: [
{ text: "Learn JavaScript", text1:"Hey" },
{ text: "Learn Vue", text1:"Hello" },
{ text: "Play around in JSFiddle", text1:"Ciao" },
{ text: "Build something awesome", text1:"Something"}
]
},
methods: {
clear (index) {
// Allows for unlimited keys
for (let key in this.todos[index]) {
this.$set(this.todos[index], key, null);
}
}
}
})
请注意,在清除方法中,我通过使用$ set方法(https://vuejs.org/v2/api/#vm-set)并引用传递的索引来确保反应性。
最后,我使用Vue的v模型将输入值绑定到todo模型,我可以获得额外的信用吗? (https://vuejs.org/v2/api/#v-model)
答案 1 :(得分:1)
如果您要清除特定字段,则可以添加方法clear
,该方法以索引为参数,但是在此之前,您应该为每个{{1}添加value
和value1
项}}并将它们绑定到字段,如下所示:
todo
new Vue({
el: "#app",
data: {
todos: [{
text: "Learn JavaScript",
text1: "Hey",
value1:'',
value:''
},
{
text: "Learn Vue",
text1: "Hello",
value1:'',
value:''
},
{
text: "Play around in JSFiddle",
text1: "Ciao",
value1:'',
value:''
},
{
text: "Build something awesome",
text1: "Something",
value1:'',
value:''
}
]
},
methods:{
clear(i){
this.todos[i].value='';
this.todos[i].value1='';
}
}
})