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class HtmlService method .setSandboxMode()

HtmlService is the Apps Script service.

.setSandboxMode() is the method name you will see after a dot in your code.

What it does

Sets how much access client-side JavaScript has in the output.

Why it's used

Control how much client-side JS can reach server functions.
Tighten security on public web app HTML.

Common errors

Forgetting parentheses on setSandboxMode. Write HtmlService.setSandboxMode(), not HtmlService.setSandboxMode or setSandboxMode by itself.
Skipping dots between chained calls. Each step needs a dot, like HtmlService.setSandboxMode().
Adding spaces where they do not belong. Write HtmlService.setSandboxMode(), not HtmlService .setSandboxMode(), HtmlService.setSandboxMode (), or HtmlService . setSandboxMode().
Wrong capitalization. Use HtmlService and setSandboxMode, not htmlservice or setsandboxmode.

Official Google docs

Explore

Related methods

.setHeight()
Sets the height of a dialog in pixels.
.setWidth()
Sets the width of a dialog in pixels.
.createHtmlOutput()
Builds HTML output from a string for dialogs or sidebars.
.createTemplate()
Creates an HTML template from a string with scriptlets.
.setTitle()
Sets the title shown on a dialog or sidebar.

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