JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" class="login-form-showchars" value="Show">

JavaScript

$('.login-form-showchars').on('click', function()
{
  var target = $('.login-form-password'), $this = $(this);
  target.attr('type', function(i, oldType)
  {
     this.type = oldType == 'password' ? 'text' : 'password';
     $this.val(this.type == 'text' ? 'Hide' : 'Show');
  });
})