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Input Range value 属性
tryjsref_range_value2
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<!DOCTYPE html> <html> <body> Points: <input type="range" id="myRange" value="20"> <p>Click the button to display the value of the value attribute of the slider control.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { let x = document.getElementById("myRange").value; document.getElementById("demo").innerHTML = x; } </script> </body> </html>