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问题:

I've got this piece of code:

$(document).ready(function () {
    $.getJSON('http://localhost:5000/', function (response) {
        console.log(response);
    });
});

localhost:5000 is a flask/python script that returns a json like:

{
  "data": [
    0, 
    0, 
    0,

And I'm getting:

$.getJSON is not a function TypeError: $.getJSON is not a function

Any tips where I can start untangling the whoolball?

Thanks!

Edit:

HTML:

<!DOCTYPE html>
<html>

<head>
    <script src="https://code.jquery.com/jquery-3.1.1.slim.min.js"></script>
    <script src="lib/main.js"></script>
</head>

<body>
</body>

</html>

lib/main.js is where the document.ready is located.

Thanks!

回答1:

You seem to be using slim version of jquery which does not have the method getJSON thats why you are getting this error.

Please use the full version of jquery instead from the below link.

https://code.jquery.com/jquery-3.1.1.min.js

Slim version of jquery excludes ajax, animations effects etc

回答2:

Thus happens commonly when migrating codebases from jQuery v1.x+ to v3.0+ as jQuery updated/deprecated/discontinued some of it's API.

I recommend using jQuery Migrate which will address this, along with other issues:

Get it here via CDN:

https://cdnjs.com/libraries/jquery-migrate

If using Gulp/Grunt, you can import into your project using

npm install --save jquery jquery-migrate

Github Repository - https://github.com/jquery/jquery-migrate

Read more about jQuery v3.0+.. http://blog.jquery.com/2016/06/09/jquery-3-0-final-released/

回答3:

function cinta(){
$.getJSON('http://localhost:5000/', function (response) {
        console.log(response);
    });
}
cinta();
$(document).ready(function () {
  console.log('yesss');  
});

This work for me in python flask