This method has been deprecated. Customizer no longer supports IE8, so all supported browsers recognize HTML5 instead.

WP_Customize_Manager::customize_preview_html5()

Print a workaround to handle HTML5 tags in IE < 9.

Source

File: wp-includes/class-wp-customize-manager.php 

	public function customize_preview_html5() {
		_deprecated_function( __FUNCTION__, 'WP-4.7.0' );
	}

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Related

Uses

Uses
Uses Description
wp-includes/functions.php: _deprecated_function()

Mark a function as deprecated and inform when it has been used.

Changelog

Changelog
Version Description
WP-4.7.0 Customizer no longer supports IE8, so all supported browsers recognize HTML5.
WP-3.4.0 Introduced. This method has been deprecated. Customizer no longer supports IE8, so all supported browsers recognize HTML5 instead.