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<html><body><input type="week" id="myWeek"><p>Click the button to set the week field to read-only.</p><p><strong>Tip:</strong> To see the effect, try to type something in the week field before and after clicking the button.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { document.getElementById("myWeek").readOnly = true;}</script></body></html>