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JavaScript Boolean() 方法
tryjsref_boolean_3
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<!DOCTYPE html> <html> <body> <h1>JavaScript Booleans</h1> <h2>The Boolean() Method</h2> <p>Create Booleans.</p> <p id="demo"></p> <script> let b1 = Boolean(0); let b2 = Boolean(1); let b3 = Boolean(false); let b4 = Boolean(true); document.getElementById("demo").innerHTML = b1 + "," + b2 + "," + b3 + "," + b4; </script> </body> </html>