Debug an HTTP interaction from the browser

Problem

A click or submission produces the wrong result and you need to find whether the problem is the element, scope, request, response, or rendering.

Before you start

Open the Elements, Console, and Network panels. Select the element that owns the HTTP directive so it is available as $0 in the console.

Follow one interaction

const scope = angular.getScope($0);
scope.order;

Check the directive attributes on $0, inspect the values used by its expressions, then perform the interaction with Network recording enabled. Read the request method, URL, payload, status, content type, and response before looking at the rendered result.

After the response, inspect the scope again. If the response is correct but the scope is not, check the directive assignment such as $res, on-success, or on-error. If scope is correct but the page is not, inspect the binding or conditional directive that renders it.

Failure path

Do not debug only the successful request. Preserve the failed response in the Network panel and inspect the error branch, including status-specific behavior for 401, 403, 409, 422, and 5xx responses.

Apply it now

Take one interaction that currently feels opaque and write down the value at each step: element, scope before request, request, response, scope after request, and DOM result. The first unexpected value identifies the layer to fix.

Verify

Repeat the trace after the fix. Confirm the request occurs once, the correct branch runs, and a failed response leaves the scope and DOM in a usable state.