JavaScript把一个逻辑值转换为字符串并返回结果的方法toString()

booleanObject.toString()

<script type="text/javascript">
 
 var boo = new Boolean(true)
document.write(boo.toString())

</script>

true

//数组
var array = ["CodePlayer", true, 12, -5];
document.writeln( array.toString() ); // CodePlayer,true,12,-5

// 日期
var date = new Date(2013, 7, 18, 23, 11, 59, 230);
document.writeln( date.toString() ); // Sun Aug 18 2013 23:11:59 GMT+0800 (中国标准时间)

// 日期2
var date2 = new Date(1099, 7, 18, 23, 11, 59, 230);
document.writeln( date2.toString() ); // Fri Aug 18 1099 23:11:59 GMT+0800 (中国标准时间)

// 数字
var num =  15.26540;
document.writeln( num.toString() ); // 15.2654

// 布尔
var bool = true;
document.writeln( bool.toString() ); // true

// Object
var obj = {name: "张三", age: 18};
document.writeln( obj.toString() ); // [object Object]

// HTML DOM 节点
var eles = document.getElementsByTagName("body");
document.writeln( eles.toString() ); // [object NodeList]
document.writeln( eles[0].toString() ); // [object HTMLBodyElement]