I wanted to replace a particular text "Dog" in an input box of a webpage to the text "Cat". I am new to jaavascript, so please pardon me for asking this question if I happen to break any forum rules. Thank you in advance. Vicky.
You can get an element by it's id and then change it's value
document.getElementById("nameofid").value = "Cat";
you can use replace() function fot that.
const ta = document.querySelector("textarea");
const str = ta.value.replace("dog","cat");
ta.value = str
console.log(ta.value,"change to" ,str)<textarea>a little dog.</textarea><html>
<body>
<h2>Change input box to Cat</h2>
<div id="inputBoxId">Dog</div>
<script>
document.getElementById("inputBoxId").innerHTML = "Cat";
</script>
</body>
</html>