replace document javascript code example

Example 1: javascript replace element

<html>
<head>
</head>
<body>
  <div>
    <a id="myAnchor" href="http://www.stackoverflow.com">StackOverflow</a>
  </div>
<script type="text/JavaScript">
  var myAnchor = document.getElementById("myAnchor");
  var mySpan = document.createElement("span");
  mySpan.innerHTML = "replaced anchor!";
  myAnchor.parentNode.replaceChild(mySpan, myAnchor);
</script>
</body>
</html>

Example 2: javascript string replace

const p = 'Its going to rain today and its going to rain tomorrow';

// Example of replacing all occurrances

// g = global search, which searches all instances
// i = case insensitive, which will match 'a' with 'A'
const regex = /rain/gi;
console.log(p.replace(regex, 'snow'));
// expected output: "Its going to snow today and its going to snow tomorrow"

// Example of replacing the first occurance
console.log(p.replace('rain', 'snow'));
// expected output: "Its going to snow today and its going to rain tomorrow"

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