@lobehub/ui/es/HtmlPreview/injectStorageShim.mjs.map

Lobe UI is an open-source UI component library for building AIGC web apps

{"version":3,"file":"injectStorageShim.mjs","names":[],"sources":["../../src/HtmlPreview/injectStorageShim.ts"],"sourcesContent":["/**\n * Why: When iframe sandbox does not include `allow-same-origin`, accessing\n * `window.localStorage` / `window.sessionStorage` throws a SecurityError.\n * Many LLM-generated demos use these APIs as a convenience even when they\n * don't need persistence — letting them throw kills the whole demo.\n *\n * The shim defines per-frame in-memory Storage objects that match the\n * Storage interface, so naive `localStorage.setItem(...)` calls succeed.\n * State does not survive a reload (acceptable — sandbox is throwaway).\n */\nexport const STORAGE_SHIM_SCRIPT = `\n(function () {\n  function createStorage() {\n    var store = Object.create(null);\n    return {\n      get length() {\n        return Object.keys(store).length;\n      },\n      key: function (i) {\n        var keys = Object.keys(store);\n        return i >= 0 && i < keys.length ? keys[i] : null;\n      },\n      getItem: function (k) {\n        return Object.prototype.hasOwnProperty.call(store, k) ? store[k] : null;\n      },\n      setItem: function (k, v) {\n        store[String(k)] = String(v);\n      },\n      removeItem: function (k) {\n        delete store[k];\n      },\n      clear: function () {\n        store = Object.create(null);\n      },\n    };\n  }\n\n  function tryShim(name) {\n    try {\n      // Accessing the property in a sandboxed (no allow-same-origin) frame\n      // throws synchronously — that's the signal to install the shim.\n      // eslint-disable-next-line no-unused-expressions\n      window[name];\n      return;\n    } catch (_) {}\n    try {\n      Object.defineProperty(window, name, {\n        configurable: true,\n        value: createStorage(),\n      });\n    } catch (_) {}\n  }\n\n  tryShim('localStorage');\n  tryShim('sessionStorage');\n})();\n`;\n"],"mappings":";;;;;;;;;;;AAUA,MAAa,sBAAsB"}