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I am making a web app using Python and have a variable that I want to display on an HTML page. How can I go about doing so? Would using {% VariableName %} in the HTML page be the right approach to this?
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To add the content of the javascript variable to the html use innerHTML() or create any html tag, add the content of that variable to that created tag and append that tag to the body or any other existing tags in the html.
To write out into HTML and display its output, you can use the “document. write()” function. To write into an HTML element and display its output, you can use the “document. getElementById()” function with the “.
log() is a function in JavaScript which is used to print any kind of variables defined before in it or to just print any message that needs to be displayed to the user. Syntax: console. log(A);
This is very clearly explained in the Flask documentation so I recommend that you read it for a full understanding, but here is a very simple example of rendering template variables.
HTML template file stored in templates/index.html:
<html>
<body>
<p>Here is my variable: {{ variable }}</p>
</body>
</html>
And the simple Flask app:
from flask import Flask, render_template
app = Flask('testapp')
@app.route('/')
def index():
return render_template('index.html', variable='12345')
if __name__ == '__main__':
app.run()
Run this script and visit http://127.0.0.1:5000/ in your browser. You should see the value of variable rendered as 12345
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