Hello everybody ! I hope someone will can help me.

I want to execute a python function by clicking on a button in xml template, using JavaScript but it does not work.

Here is my test_js.js file:

try {
    console.log(">>TRY");
    odoo.define('reference.js', function(require) {
        'use strict';
        console.log('>>>>>FINE');
        var form_widget = require("web.form_widget");
        var core = require("web.core");
        var _t = core._t;
        var QWeb = core.qweb;
        var Model = require('web.Model');
        
        form_widget.WidgetButton.include({
            on_click: function() {
                if(this.node.attrs.custom === "click"){
                    var model = new Model("test.activity").get_func("do_something")();
                    console.log(">>>>OK: " + model);
                    
                    return;
                }
                this._super();
            },
        });
    });
}
catch(err) {
    console.log(">>ERR: " + err.message);
}

And here is my qweb xml template:

<?xml version="1.0" encoding="UTF-8"?>
<templates>
    <t t-extend="mail.ChatThread.Message">
        <t t-jquery=".o_mail_info" t-operation="append">
            <script type="text/javascript" src="/new_module/static/src/js/test_js.js"></script>
            <button class="btn btn-primary" name="button" custom="click">TEST</button>
        </t>
    </t>
</templates>

But I don't understand. I can see "TRY" in my JS console, but everything else doesn't work. I have no error in catch, no other output in JS console, nothing, seem has no effect. What's go wrong with my code ? can anyone explain me or, better, solve this ?

Thank you so much in advance.

Bye.

UPDATE: