.glow { font-size: 80px; color: #fff; text-align: center; -webkit-animation: glow 1s ease-in-out infinite alternate; -moz-animation: glow 1s ease-in-out infinite alternate; animation: glow 1s ease-in-out infinite alternate;
}
@-webkit-keyframes glow { from { text-shadow: 0 0 10px #fff, 0 0 20px #fff, 0 0 30px #e60073, 0 0 40px #e60073, 0 0 50px #e60073, 0 0 60px #e60073, 0 0 70px #e60073; } to { text-shadow: 0 0 20px #fff, 0 0 30px #ff4da6, 0 0 40px #ff4da6, 0 0 50px #ff4da6, 0 0 60px #ff4da6, 0 0 70px #ff4da6, 0 0 80px #ff4da6; }
}
</style>
use/call the class
<h1 class="glow">GLOWING TEXT</h1>

.text-glow { text-shadow: 0 0 80px rgb(192 219 255 / 75%), 0 0 32px rgb(65 120 255 / 24%);
}

context.shadowBlur = 10;
context.shadowColor = "black";