我收到错误消息:
未捕获的TypeError:无法读取属性' push'未定义的 :1:12
尝试通过Chrome中的控制台推送另一个项目来列出待办事项:
app3.todos.push({ text: "New item" })
以下是我的代码:
HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Web for Vue.Js</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
window.onload = function () {
var app3 = new Vue({
el:"#app3",
data: {
todos:[
{text: "1"},
{text: "2"},
{text: "3"},
{text: "4"}
]
}
});
}
</script>
</head>
<body>
<div id="app3">
<ol>
<li v-for="todo in todos">
{{ todo.text }}
</li>
</ol>
</div>
</body>
</html>
答案 0 :(得分:1)
将您的代码移出页面加载的事件处理程序,一切都会好的。否则,您将无法通过控制台访问变量实例。
Budulinek昨天告诉过你。 :)
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Web for Vue.Js</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app3">
<ol>
<li v-for="todo in todos">
{{ todo.text }}
</li>
</ol>
</div>
<script>
var app3 = new Vue({
el:"#app3",
data: {
todos:[
{text: "1"},
{text: "2"},
{text: "3"},
{text: "4"}
]
}
});
</script>
</body>
</html>