<div id="html-header">
	<!--------- MOBILE-DESKTOP by @vulpi_kyle ------->
<script>
if(localStorage.getItem('rezise')) {
document.querySelector('meta[name="viewport"]').content = localStorage.getItem('rezise')
}
</script>
<!--------- КНОПКИ СМЕНЫ РАЗРЕШЕНИЯ ЭКРАНА by @vulpi_kyle ------->
<script>
var meta = document.querySelector('meta[name="viewport"]');

const btnResizeMOB = document.createElement('button');
const btnResizeDESC = document.createElement('button');

btnResizeMOB.textContent = 'MOB';
btnResizeMOB.id = 'selectMobVers'
btnResizeDESC.textContent = 'DESC';
btnResizeDESC.id = 'selectDescVers'

document.body.insertAdjacentElement('afterbegin', btnResizeMOB)
document.body.insertAdjacentElement('afterbegin', btnResizeDESC)

  // устанавливаем множители
btnResizeDESC.addEventListener('click', ()=> {
	meta.content = "width=device-width; initial-scale=0.4"
	localStorage.setItem('rezise', meta.content)
})

btnResizeMOB.addEventListener('click', ()=> {
	meta.content = "width=device-width; initial-scale=1.0"
	localStorage.setItem('rezise', meta.content)
})
</script>