使用Flask返回来修改网页 [英] Using Flask return to modify a webpage
问题描述
app = Flask(__ name__)
@ app.route(' / python /',methods = ['GET','POST'])
def index():
返回Hello World
if __name__ ==__main__:
app.run(debug = True)
以及一个非常简单的带有文本区域和按钮的网页。
< textarea id =mytextarea>一些文字...< / textarea>
< p>点击按钮< / p>
< button type =buttononclick =myFunction()>点击此处< /按钮>
< p id =demo> < / p为H.
我想要做的是在按钮上使用脚本将Flask的响应放在网页上被点击。我尝试了以下,但它不起作用。当我点击按钮时没有任何反应。我做错了什么?
< script>
函数myFunction(){
var xhttp = new XMLHttpRequest();
xhttp.open(POST,http://127.0.0.1:5000/python/,true);
xhttp.send();
var x = xttp.response;
document.getElementById(demo)。innerHTML = x;
}
< / script>
(我是初学者)
见下面的代码和查看 XMLHttpRequest.onreadystatechange 了解详情
< script>
函数myFunction(){
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange =函数(){
如果(xhttp.readyState === XMLHttpRequest.DONE){
的document.getElementById( 演示)的innerHTML = xhttp.responseText。
}
};
xhttp.open(POST,http://127.0.0.1:5000/python/,true);
xhttp.send();
}
< / script>
如果您从烧瓶应用程序发送html代码,请参阅示例代码,来自flask的render_template。
@ app.route('/')
def hello_world():
return render_template(' index.html')
I have the simplest flask app:
app = Flask(__name__)
@app.route('/python/', methods = ['GET','POST'])
def index():
return "Hello World"
if __name__ == "__main__":
app.run(debug=True)
and a very simple webpage with a text area and a button.
<textarea id="mytextarea">Some text...</textarea>
<p> Click the button </p>
<button type="button" onclick="myFunction()"> Click here</button>
<p id="demo"> </p>
What I want to do is to put the response from Flask on the webpage using a script when the button is clicked. I tried the following but it doesn't work. Nothing happens when I click the button. What am I doing wrong?
<script>
function myFunction() {
var xhttp = new XMLHttpRequest();
xhttp.open("POST", "http://127.0.0.1:5000/python/", true);
xhttp.send();
var x = xttp.response;
document.getElementById("demo").innerHTML = x;
}
</script>
(I am a beginner).
see the code below and review the XMLHttpRequest.onreadystatechange for detail
<script>
function myFunction() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function () {
if (xhttp.readyState === XMLHttpRequest.DONE) {
document.getElementById("demo").innerHTML = xhttp.responseText;
}
};
xhttp.open("POST", "http://127.0.0.1:5000/python/", true);
xhttp.send();
}
</script>
no cors issue if you send the html from your flask app see the example code, you need to import render_template from flask.
@app.route('/')
def hello_world():
return render_template('index.html')
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