multipleSheetHTML

<template>
	<lightning-card>
        <div class="slds-grid slds-wrap slds-m-top_xx-large slds-m-left_large">
		<div class="slds-col slds-large-size_3-of-12 slds-medium-size_12-of-12 slds-size_12-of-12">
			<span><b>Download Data in Multiple Excel Sheet</b></span>
		</div>
		<div class="slds-col slds-large-size_6-of-12 slds-medium-size_12-of-12 slds-size_12-of-12">
			<button class="slds-button slds-button_neutral" onclick={exportExcelData} style="background-color: #102a89;">
  <span class="slds-truncate" style="color: #ffffff;">Download</span>&nbsp;&nbsp;
  <lightning-icon icon-name="action:download" size="x-small" style="background-color: inherit;"></lightning-icon>
</button>
		</div>
	</div>
	</lightning-card>
</template>