@angular/material
Version:
Angular Material
43 lines • 5.66 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
/**
* The Trusted Types policy, or null if Trusted Types are not
* enabled/supported, or undefined if the policy has not been created yet.
*/
let policy;
/**
* Returns the Trusted Types policy, or null if Trusted Types are not
* enabled/supported. The first call to this function will create the policy.
*/
function getPolicy() {
if (policy === undefined) {
policy = null;
if (typeof window !== 'undefined') {
const ttWindow = window;
if (ttWindow.trustedTypes !== undefined) {
policy = ttWindow.trustedTypes.createPolicy('angular#components', {
createHTML: (s) => s,
});
}
}
}
return policy;
}
/**
* Unsafely promote a string to a TrustedHTML, falling back to strings when
* Trusted Types are not available.
* @security This is a security-sensitive function; any use of this function
* must go through security review. In particular, it must be assured that the
* provided string will never cause an XSS vulnerability if used in a context
* that will be interpreted as HTML by a browser, e.g. when assigning to
* element.innerHTML.
*/
export function trustedHTMLFromString(html) {
return getPolicy()?.createHTML(html) || html;
}
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