google material icons loading slowly, flicker from text to icon - reactjs

Question

Installing Google Material icons using Setup Method 2 self hosting for our React project the ligatures associated with the icon is sometimes displayed before the material icon.
<i class="material-icons">face</i> {/* shows text "face" on site prior to proper material icon load */}
For example the above line would display "face" for a second before showing a face. How can we delay the UI rendering until the file references are fully loaded?
/*material icons file references loaded locally */
#font-face {
font-family: 'Material Icons';
font-style: normal;
font-weight: 400;
src: url(../node_modules/material-design-icons/iconfont/MaterialIcons-Regular.eot); /* For IE6-8 */
src: local('Material Icons'), local('MaterialIcons-Regular'), url(../node_modules/material-design-icons/iconfont/MaterialIcons-Regular.woff2) format('woff2'), url(../node_modules/material-design-icons/iconfont/MaterialIcons-Regular.woff) format('woff'), url(../node_modules/material-design-icons/iconfont/MaterialIcons-Regular.ttf) format('truetype');
}

Answer 1

Create a file called preload.js in your src folder.
document.fonts.load('10pt "Material Icons"').then(function () {
console.log('Material Icons font has been preloaded.');
});
add the following script tag at the end of the head section in index.html
<script defer src="%PUBLIC_URL%/preload.js"></script>
user in your React component like this
import Icon from '#material-ui/core/Icon';
function MyComponent() {
return <Icon>home</Icon>;
}
I hope it's working

Answer 2

Answer from How to prevent material icon text from showing up when Google's JS fails to convert them?:
you can use font-display: block;, just add this CSS to your HTML head:
<style>
#font-face {
font-family: 'Material Icons';
font-display: block;
}
</style>
for more information font-display