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Meter max 属性
tryjsref_meter_max2
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<!DOCTYPE html> <html> <body> <p>Peter''s score: <meter id="myMeter" min="0" low="40" high="75" max="100" value="65"></meter></p> <p>Click the button to change the value of the max attribute of the gauge above.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myMeter").max = "80"; document.getElementById("demo").innerHTML = "The value of the max attribute was changed from ''100'' to ''80''."; } </script> </body> </html>