//disable the button
document.getElementById(BUTTON_ID).disabled = true;
//reable the button
document.getElementById(BUTTON_ID).removeAttribute('disabled');<button type="button" disabled>This button is disabled</button>document.getElementById(BUTTON_ID).disabled = true;document.getElementById("submitButtonId").disabled = true;$('#Button').prop('disabled', true);//to enable btn
let temp
temp = document.getElementById("saveBtnId") as HTMLButtonElement
if (temp) {
temp.removeAttribute('disabled');
}
//disable
if (temp) {
temp.disabled = true;
}