JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" name="saWrite">
<input type="checkbox" name="cgWrite">

JavaScript

function $(ele) {
  return {
    ele: document.querySelector(ele),
    on: function(ev, fn) {
      (document.attachEvent) ? 
      this.ele.attachEvent(ev, fn) :
      this.ele.addEventListener(ev, fn);
    },
    checked: function(change) {
     if(typeof change !== undefined) this.ele.checked = change;
     return this.ele.checked;
    }
  }
}

var sa = $('input[name="saWrite"]');

var cg = $('input[name="cgWrite"]');

cg.on('click', function(ev) {
  sa.checked(false)
});

sa.on('click', function(ev) {
  cg.checked(false);
});