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server communication without page refresh
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| from random import choice | |
| from flask import Flask, render_template, jsonify | |
| app = Flask(__name__) | |
| @app.route('/page') | |
| def page(): | |
| return render_template('page.html') | |
| @app.route('/sensors') | |
| def sensor(): | |
| animal = choice(['snake', 'octopus', 'lizard', 'cat']) | |
| return jsonify({ | |
| 'sensor1': animal | |
| }) | |
| app.run(port=8888) |
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| <html> | |
| <head> | |
| <script type="text/javascript"> | |
| function clicked() { | |
| fetch('/sensors', { | |
| method: 'GET', | |
| headers: new Headers() | |
| }) | |
| .then(data => data.json()) | |
| .then(json => { | |
| const sensor_data = json['sensor1']; | |
| const button = document.getElementById('clickme'); | |
| button.textContent = sensor_data; | |
| }); | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <button id='clickme' onclick="clicked();">Click me</button> | |
| </body> | |
| </html> |
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