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<html><body><h1>JavaScript Strings</h1><h2>The replace() Method</h2><p>replace() searches a string for a value,and returns a new string with the specified value(s) replaced:</p><p id="demo">Mr Blue has a blue house and a blue car.</p><script>let text = document.getElementById("demo").innerHTML; let result = text.replace(/blue|house|car/gi, function (x) { return x.toUpperCase();});document.getElementById("demo").innerHTML = result;</script></body></html>