testing/web-platform/tests/trusted-types/support/resolve-spv.js


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// Returns a promise that resolves with a Security Policy Violation (spv)
    // even when it is received.
function promise_spv() {
  return new Promise((resolve, reject) => {
    window.addEventListener("securitypolicyviolation", e => {
      resolve(e);
    }, { once: true });
  });
}