Splitting up React components into multiple files
Question
I have only been learning React in a week so I am new to it and I am trying to write a simple todo app.
Originally I wrote all of the components in one file and loaded that file into the HTML file and it worked great. Now I am refactoring and trying to split the components into different files.
My full code is on my Github https://github.com/yasgreen93/todolist-react on the extracting-files branch.
I have split up each component into different files and have an linked them in script tags into my HTML. This is what my HTML file looks like:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Todo List</title>
<link rel="stylesheet" href="css/styles.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react-dom.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.6.16/browser.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
</head>
<body>
<div id="container"></div>
<script type="text/babel" src="scripts/components/TodoListApp.js"> </script>
<script type="text/babel" src="scripts/components/CompleteTodo.js"></script>
<script type="text/babel" src="scripts/components/TodoList.js"></script>
<script type="text/babel" src="scripts/components/SingleTodo.js"></script>
<script type="text/babel" src="scripts/components/AddTodo.js"></script>
<script type="text/babel" src="scripts/components/CompleteTodoButton.js"></script>
<script type="text/babel">
ReactDOM.render(
<TodoListApp url="/api/todos" updateUrl="/api/todos/update" pollInterval={2000}/>,
document.getElementById('container')
);
</script>
</body>
</html>
In the console, I always get the error message Uncaught ReferenceError: TodoListApp is not defined . I have tried loading them in different orders with no success. I have also watched many videos where they do very similar approaches without using webpack and it works for them. I would like to get this working first without using webpack and then move on to learning that.
Can anyone see where I am going wrong?
1 answers
solution1
2 2016-06-11 11:54:50
You have to add your components to a global window variable in order to use them in html script tag. Like window.TodoListApp =... . var declaration is relative to a file in which you declare it.
But it is considered to be a bad practice to expose parts of you code to a global scope and to transpile JSX in the browser. Instead you should consider to use some building system like Webpack .
This way you would be able to use es2015 import syntax to import components from one file to another, bundle everything in one file and much more additional benefits like code minification, sourcemaps, livereload etc.
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