[英]Read a variable name in Javascript from Flask
I am passing variable from Flask to JavaScript using the method render_template.我使用 render_template 方法将变量从 Flask 传递到 JavaScript。
I followed this post: Passing variables from flask to javascript , but it is not working for me我关注了这篇文章:将变量从烧瓶传递到 javascript ,但它对我不起作用
Here is my code:这是我的代码:
@app.route('/')
def index():
return render_template('index.html')
@app.route('/debug')
def index_debug():
return render_template('index.html', debug=True)
I would like to read it from a JavaScript file.我想从 JavaScript 文件中读取它。 I tried using this method:我尝试使用这种方法:
this is my html file:这是我的 html 文件:
<head>
<script type="text/javascript">
var debugMode = {{ debug }};
</script>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.4.1.js" crossorigin="anonymous"></script>
<script src="/static/index.js"></script>
</head>
But when i try accessing this variable in my index.js.但是当我尝试在我的 index.js 中访问这个变量时。 the variable debugMode is undefined.变量 debugMode 未定义。
Try this尝试这个
<head>
<script type="text/javascript">
window.debugMode = {{ debug }};
</script>
<script src="/static/index.js"></script>
</head>
If you want to read a variable from HTML in JS you ought to declare this var in window scope and read in JS file like this.如果你想从 JS 中的 HTML 读取一个变量,你应该在窗口范围内声明这个变量并像这样读取 JS 文件。
const myNewVar = window.debugMode
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