IFRAME 模式的限制比其他沙箱模式少很多，執行速度也最快，但完全不支援某些舊版瀏覽器，包括 Internet Explorer 9。您也可以檢查 google.script.sandbox.mode，在用戶端指令碼中讀取沙箱模式。請注意，這項屬性會傳回用戶端上的實際模式，如果使用者的瀏覽器不支援要求的模式，則可能與伺服器上要求的模式不同。
<!-- Read the sandbox mode (in a client-side script). -->
<script>
alert(google.script.sandbox.mode);
</script>
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-08-04 (世界標準時間)。"],[[["\u003cp\u003eSandboxMode is used for setting the sandbox environment for client-side HtmlService scripts in Google Apps Script.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eIFRAME\u003c/code\u003e is the only supported SandboxMode; \u003ccode\u003eNATIVE\u003c/code\u003e and \u003ccode\u003eEMULATED\u003c/code\u003e are deprecated and sunset.\u003c/p\u003e\n"],["\u003cp\u003eClient-side code in HTML service runs in a security sandbox with restrictions to protect users.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eIFRAME\u003c/code\u003e mode has fewer restrictions and runs faster but might not work in older browsers like Internet Explorer 9.\u003c/p\u003e\n"],["\u003cp\u003eYou can read the actual sandbox mode on the client-side using \u003ccode\u003egoogle.script.sandbox.mode\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,["# Enum SandboxMode\n\nSandboxMode\n\nAn enum representing the sandbox modes that can be used for client-side [HtmlService](/apps-script/reference/html/html-service)\nscripts. These values can be accessed from [HtmlService.SandboxMode](/apps-script/reference/html/html-service#SandboxMode), and set by calling\n[HtmlOutput.setSandboxMode(mode)](/apps-script/reference/html/html-output#setSandboxMode(SandboxMode)).\n\nTo call an enum, you call its parent class, name, and property. For example, `\nHtmlService.SandboxMode.IFRAME`.\n\nThe `NATIVE` and `EMULATED` modes were [deprecated on October 13, 2015](https://workspace.google.com/blog/product-announcements/google-apps-script-update-htmlservice) and both are now sunset. Only `IFRAME` mode is now\nsupported.\n\nTo protect users from being served malicious HTML or JavaScript, client-side code served from\nHTML service executes in a security sandbox that imposes restrictions on the code. The method\n[HtmlOutput.setSandboxMode(mode)](/apps-script/reference/html/html-output#setSandboxMode(SandboxMode)) previously allowed script authors to choose\nbetween different versions of the sandbox, but now has no effect. For more information, see the\n[guide to restrictions in HTML service](/apps-script/guides/html/restrictions).\n\nThe `IFRAME` mode imposes many fewer restrictions than the other sandbox modes and runs\nfastest, but does not work at all in certain older browsers, including Internet Explorer 9. The\nsandbox mode can also be read in a client-side script by inspecting `google.script.sandbox.mode`. Note that this property returns the actual mode on the client, which\nmay differ from the mode requested on the server if the requested mode is not supported in the\nuser's browser.\n\n```html\n\u003c!-- Read the sandbox mode (in a client-side script). --\u003e\n\u003cscript\u003e\n alert(google.script.sandbox.mode);\n\u003c/script\u003e\n``` \n\n### Properties\n\n| Property | Type | Description |\n|------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `EMULATED` | `Enum` | A legacy sandbox mode that emulates ECMAScript 5 strict mode using only the features available in ECMAScript 3. This mode was the default prior to February 2014. `EMULATED` was [sunset as of December 10, 2015](/apps-script/guides/support/sunset). All scripts attempting use `EMULATED` will now use `IFRAME` instead. |\n| `IFRAME` | `Enum` | A sandbox mode that uses iframe sandboxing instead of the Caja sandbox technology used by the `EMULATED` and `NATIVE` modes. This mode is the default for new scripts as of November 12, 2015 and for all scripts as of July 6, 2016. This mode imposes many fewer restrictions than the other sandbox modes and runs fastest, but does not work at all in certain older browsers, including Internet Explorer 9. |\n| `NATIVE` | `Enum` | A sandbox mode that is built on top of ECMAScript 5 strict mode. A sandbox mode built on top of ECMAScript 5 strict mode. This mode was [sunset as of July 6, 2016](/apps-script/guides/support/sunset). All scripts now use `IFRAME` mode. |"]]
