response-json-bom.html

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This WPT test may be referenced by the following Test IDs:
- /xhr/response-json-bom.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>XMLHttpRequest: responseType json with UTF-8 BOM</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script>

"use strict";

// Test that XHR handles UTF-8 BOM in JSON responses correctly

// The server returns JSON prefixed with a UTF-8 BOM (0xEF 0xBB 0xBF)

async_test(t => {

  const xhr = new XMLHttpRequest();

  xhr.open("GET", "resources/json-with-bom.py");

  xhr.responseType = "json";

  xhr.onload = t.step_func_done(() => {

    assert_equals(xhr.status, 200, "Status should be 200");

    assert_not_equals(xhr.response, null, "Response should not be null (BOM should be stripped)");

    assert_equals(xhr.response.key, "value", "JSON should be parsed correctly after BOM is stripped");

});

  xhr.onerror = t.unreached_func("XHR should not error");

  xhr.send();

}, "JSON response with UTF-8 BOM should be parsed correctly");

</script>