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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 str = document.getElementById("demo").innerHTML; let res = str.replace(/blue/g, "red");document.getElementById("demo").innerHTML = res;</script></body></html>