Source

File: wp-includes/customize/class-wp-customize-nav-menu-name-control.php

protected function content_template() {
		?>
		<label>
			<# if ( data.label ) { #>
				<span class="customize-control-title">{{ data.label }}</span>
			<# } #>
			<input type="text" class="menu-name-field live-update-section-title"
				<# if ( data.description ) { #>
					aria-describedby="{{ data.section }}-description"
				<# } #>
				/>
		</label>
		<# if ( data.description ) { #>
			<p id="{{ data.section }}-description">{{ data.description }}</p>
		<# } #>
		<?php
	}