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Showing content from https://developer.mozilla.org/en-US/docs/Web/API/Sanitizer/get below:

Sanitizer: get() method - Web APIs

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The get() method of the Sanitizer interface returns a SanitizerConfig dictionary instance that represents the current Sanitizer configuration.

This may be used to create a sanitizer that is slightly modified from the default; by first getting and then modifying the default sanitizer configuration, and then using it to construct a new sanitizer.

The returned configuration can also be used to inspect the configuration, and can be passed directly the HTML parsing functions. Note however that it will be more efficient to pass a Sanitizer rather than a configuration dictionary, particularly where the Sanitizer is to be used multiple times.

None

A SanitizerConfig.

This example shows how you might create a new sanitizer and get its configuration.

#log {
  height: 400px;
  overflow: scroll;
  padding: 0.5rem;
  border: 1px solid black;
}

const logElement = document.querySelector("#log");
function log(text) {
  logElement.textContent = text;
}

The following code tests whether the Sanitizer interface is supported, and if so creates a new Sanitizer object using a simple SanitizerConfig that allows the HTML elements: <div>, <p>, <span>, <script>. It then gets and logs the configuration.

if ("Sanitizer" in window) {

// Create sanitizer using SanitizerConfig
const sanitizer = new Sanitizer({ elements: ["div", "p", "span", "script"] });

// Get current configuration
const sanitizerConfig = sanitizer.get();

log(JSON.stringify(sanitizerConfig, null, 2));

} else {
  log("The HTML Sanitizer API is NOT supported in this browser.");
}

The output is logged below. Note that the same elements set when constructing the sanitizer are returned, but the new elements also have a namespace. Note also here that comments and data attributes will be allowed.

This example shows how you can get the configuration for the default Sanitizer. This might then be modified and used to create a new Sanitizer that meets your specific needs.

#log {
  height: 400px;
  overflow: scroll;
  padding: 0.5rem;
  border: 1px solid black;
}

The following code tests whether the Sanitizer interface is supported. It then creates the default Sanitizer, passing no options, and then gets and logs the configuration.

const logElement = document.querySelector("#log");
function log(text) {
  logElement.textContent = text;
}

if ("Sanitizer" in window) {

// Create default sanitizer
const sanitizer = new Sanitizer();

// Get default configuration
const defaultConfig = sanitizer.get();

log(JSON.stringify(defaultConfig, null, 2));

} else {
  log("The HTML Sanitizer API is NOT supported in this browser.");
}

The default sanitizer configuration is logged below. Note that the default configuration is quite big, allowing many elements and attributes.

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