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<!DOCTYPE html> <html> <body> <h1>output 元素</h1> <form oninput="x.value=parseInt(a.value)+parseInt(b.value)"> <input type="range" id="a" value="50"> +<input type="number" id="b" value="25"> =<output name="x" for="a b"></output> </form> <p><strong>注意：</strong>Edge 12（或更早版本）不支持 output 元素。</p> </body> </html>