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Meta httpEquiv 属性
tryjsref_meta_httpequiv
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<!DOCTYPE html> <html> <body> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <p>Click the button to return the value of the http-equiv attribute.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementsByTagName("META")[0].httpEquiv; document.getElementById("demo").innerHTML = x; } </script> </body> </html>