javascript - vue 全局組件為什么不能跟vue實例分開到不同的文件中？
問題描述
global.js文件:var app;app = new Vue({ el: '#app', data: {value: 'hello world', }});login.js
Vue.component(’login’, { template: ’<h1>login</h1>’})index.html
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>Daemon</title> <script src='http://m.baoyu77737.com/wenda/js/jquery-3.2.1.js' charset='UTF-8'></script> <script src='http://m.baoyu77737.com/wenda/js/semantic.min.js' charset='UTF-8'></script> <script src='http://m.baoyu77737.com/wenda/js/vue.js' charset='UTF-8'></script> <link rel='stylesheet' href='http://m.baoyu77737.com/wenda/css/semantic.min.css'></head><body> <p id='app'><p class='ui container'> <p class='ui pider'></p> <p class='ui blue button'>{{value}} </p> <login></login></p> </p> <script src='http://m.baoyu77737.com/wenda/js/global.js' charset='UTF-8'></script> <script src='http://m.baoyu77737.com/wenda/js/login.js' charset='UTF-8'></script></body></html>
結果報錯:[Vue warn]: Unknown custom element: <login> - did you register the component correctly? For recursive components, make sure to provide the 'name' option.(found in <Root>)
哪位大俠能為小白指點下？
問題解答
回答1：html中我做了一下修改，調整了js引入的順序，因為需要在保證app根組件渲染的時候，其中用到的組件已經聲明注冊。
<!DOCTYPE html><html lang='en'><head> <meta charset='UTF-8'> <title>Daemon</title> <script src='http://m.baoyu77737.com/wenda/js/jquery-3.2.1.js' charset='UTF-8'></script> <script src='http://m.baoyu77737.com/wenda/js/semantic.min.js' charset='UTF-8'></script> <script src='http://m.baoyu77737.com/wenda/js/vue.js' charset='UTF-8'></script> <link rel='stylesheet' href='http://m.baoyu77737.com/wenda/css/semantic.min.css'></head><body> <p id='app'><p class='ui container'> <p class='ui pider'></p> <p class='ui blue button'>{{value}} </p> <login></login></p> </p> <script src='http://m.baoyu77737.com/wenda/js/login.js' charset='UTF-8'></script> <script src='http://m.baoyu77737.com/wenda/js/global.js' charset='UTF-8'></script></body></html>回答2：
全局API系列都必須在實例化之前申明
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