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JS 参考手册
Input Search value 属性
tryjsref_search_value
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<!DOCTYPE html> <html> <body> Search: <input type="search" id="mySearch" value="Food"> <p>Click the button to change the value of the value attribute of the search field.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("mySearch").value = "Muscle Cars"; } </script> </body> </html>