Use Laravel route in javascript?

I have a Laravel route returning a JSON, and I have a JS file that dynamically generates a table with the results in a JSON. I just need to use this JSON in my JS table. That’s all.

JS code (registroCarros should receive the value from the JSON, route or whatever)

function CreateTableFromJSON() {
    

    var registroCarros = []

    // EXTRAI VALOR PARA O HEADER HTML 
    var col = [];
    for (var i = 0; i < registroCarros.length; i++) {
          for (var key in registroCarros[i]) {
            if (col.indexOf(key) === -1) {
                col.push(key);
            }
        }
    }

    // CREATE TABLE 
    var table = document.createElement("table");
    table.id = 'myTable';



   
    var tr = table.insertRow(-1);                   //ROW.

    for (var i = 0; i < col.length; i++) {
        var th = document.createElement("th");      //HEADER.
        th.innerHTML = col[i];
        tr.appendChild(th);
    }

    for (var i = 0; i < col.length; i++) {
       var td1 = document.getElementsByTagName("tr");      //HEADER.
       td1.id="teste;"
   }

    // ADD JSON IN TABLE AS ROWS.
    for (var i = 0; i < registroCarros.length; i++) {

        tr = table.insertRow(-1);

        for (var j = 0; j < col.length; j++) {
            var tabCell = tr.insertCell(-1);
            tabCell.innerHTML = registroCarros[i][col[j]];
        }
    }

    
    var divContainer = document.getElementById("showData");
    divContainer.innerHTML = "";
    divContainer.appendChild(table);


    
}

My Controller (dbtest is a function in my model that have the SELECT im using):

 public function returnJSON()
    {
        $teste   = new user();
        return response()->json(($teste->dbtest()));
        
    }

and my route:

Route::get('returnJSON', 'AppHttpControllersController@returnJSON',           ['names' => 'returnJSON']);

all I need is to use this route in my JavaScript.

Answer

Your Controller

public function returnJSON()
{
    $teste = new user();
    return response()->json($teste->dbtest());    
}

Then your Route should look like this:

Route::get(
    'returnJSON',  // URL
    'AppHttpControllersController@returnJSON'  // Controller
)->name('returnJSON');  // Route name

Then finally in your blade file (JS code), you can use it as:

// behind any event (e.g. button click or value change etc.)
fetch("{{ route('returnJSON') }}")       // This is the route name given in your route
// OR fetch("{{ url('returnJSON') }}")   // and this is the URL (either can be used)
.then(res => res.json())
.then(data => CreateTableFromJSON(data));

/* 🔴REMEMBER */
// Your "CreateTableFromJSON" function must require an argument
// so that it can take the response (returned JSON) in it    
function CreateTableFromJSON(registroCarros = []) {
    // EXTRAI VALOR PARA O HEADER HTML 
    var col = [];
    for (var i = 0; i < registroCarros.length; i++) {
        for (var key in registroCarros[i]) {
            if (col.indexOf(key) === -1) {
                col.push(key);
            }
        }
    }

    // CREATE TABLE 
    var table = document.createElement("table");
    table.id = 'myTable';

    var tr = table.insertRow(-1);                          //ROW.

    for (var i = 0; i < col.length; i++) {
        var th = document.createElement("th");             //HEADER.
        th.innerHTML = col[i];
        tr.appendChild(th);
    }

    for (var i = 0; i < col.length; i++) {
    var td1 = document.getElementsByTagName("tr");        //HEADER.
    td1.id="teste;"
    }

    // ADD JSON IN TABLE AS ROWS.
    for (var i = 0; i < registroCarros.length; i++) {

        tr = table.insertRow(-1);

        for (var j = 0; j < col.length; j++) {
            var tabCell = tr.insertCell(-1);
            tabCell.innerHTML = registroCarros[i][col[j]];
        }
    }

    
    var divContainer = document.getElementById("showData");
    divContainer.innerHTML = "";
    divContainer.appendChild(table);    
}

NOTE
This JS code must be in your blade file otherwise you have to put exact URL in fetch, like: fetch('xyz.com/returnJSON')

---

Also verify if the controller & model is working fine and you’re gettting proper data. You can do it in:

either Controller:

public function returnJSON()
{
    $teste = new user();
    $data = $teste->dbtest();
    dd($data);    // HERE

    return response()->json($data);    
}

or JS (in beginning of ‘CreateTableFromJSON’ function):

function CreateTableFromJSON(registroCarros = []) {
    console.log(registroCarros);    // HERE

    ...
}