how to give write effect in html css code example

Example 1: javascript typewriter effect

// *** JS Typewriter Effect ***

	let i = 0;
    let target = document.getElementById("target");
    let text = target.innerHTML;
    target.innerHTML = ' ';
    let speed = 75; //speed duration of effect in millisec

    typeWriter(); //to call function
    function typeWriter() {
        if (i < text.length) {
            target.innerHTML += text.charAt(i);
            i++;
            setTimeout(typeWriter, speed);
        }
    }

Example 2: javascript text auto writing

/*
  Creating a Typing Effect
-----------------------------
1) Add HTML: */
<p id="demo"></p>
<button onclick="typeWriter()">Click me</button>
/* 
2) Add JavaScript: */
var i = 0;
var txt = 'Lorem ipsum typing effect!'; /* The text */
var speed = 50; /* The speed/duration of the effect in milliseconds */

function typeWriter() {
  if (i < txt.length) {
    document.getElementById("demo").innerHTML += txt.charAt(i);
    i++;
    setTimeout(typeWriter, speed);
  }
}