Function ensureEscapeHTMLPolicy

Pagetual/pagetual.user.js:4892–4907

()

    }

    function ensureEscapeHTMLPolicy() {
        if (!canPolicySetHTML) return null;
        if (escapeHTMLCreator) return escapeHTMLPolicy;
        const createPolicy = _unsafeWindow && _unsafeWindow.trustedTypes && _unsafeWindow.trustedTypes.createPolicy;
        if (typeof createPolicy !== "function") return (canPolicySetHTML = false, null);
        try {
            escapeHTMLPolicy = createPolicy(MY_POLICY_NAME, {
                createHTML: (string, sink) => string,
                createScriptURL: string => string,
                createScript: string => string
            });
        } catch (e) {}
        escapeHTMLCreator = escapeHTMLPolicy && escapeHTMLPolicy.createHTML;
        if (!escapeHTMLCreator) canPolicySetHTML = false;
        return escapeHTMLPolicy;
    }

    function tryPolicySetHTML(target, htmlStr) {
        if (!canPolicySetHTML) return false;