获取值的类型:
var toString = Object.prototype.toString; function getType(o) { return toString.call(o).slice(8,-1); }
document.write(getType(null)); document.writeln("<br/>"); document.write(getType(undefined));
输出:
时间: 2024-08-01 10:46:22
获取值的类型:
var toString = Object.prototype.toString; function getType(o) { return toString.call(o).slice(8,-1); }
document.write(getType(null)); document.writeln("<br/>"); document.write(getType(undefined));
输出: