Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <h2>JavaScript</h2> <p>empty 空字符串既有合法值又有类型：</p> <p id="demo"></p> <script> var car = ""; document.getElementById("demo").innerHTML = "value 值为：" + car + "<br>" + "type 类型为：" + typeof car; </script> </body> </html>