js的console总结
1.
<!DOCTYPE html> <html> <head> <title>format</title> <meta charset="gbk"> </head> <body> 我爱GH </body> <script type="text/javascript"> console.log("log"); console.warn("warning"); console.error("error"); </script> </html>
2.
<!DOCTYPE html> <html> <head> <title>format</title> </head> <body> hello World </body> <script type="text/javascript"> console.log("身高:%dcm,体重:%fkg",188,44.4); </script> </html>
3.
<!DOCTYPE html> <html> <head> <title>分组的使用</title> </head> <body> hello World </body> <script type="text/javascript"> console.group("1"); console.groupEnd(); console.group("2"); console.log("2.1:我很丑"); console.log("2.2:但是我很温柔"); console.groupEnd(); </script> </html>
4.
<!DOCTYPE html> <html> <head> <title>类的输出</title> </head> <body> hello World </body> <script type="text/javascript"> var info = { age:20, interesting:"mobile programing" }; console.dir(info); </script> </html>
5.
<!DOCTYPE html> <html> <head> <title>html元素的打印</title> </head> <body> <div id="bice"> <p>我爱程序设计</p> </div> </body> <script type="text/javascript"> var info = document.getElementById('bice'); console.dirxml(info); </script> </html>
6.
<!DOCTYPE html> <html> <head> <title>assert判断真假</title> </head> <body> <div id="bice"> <p>我爱程序设计</p> </div> </body> <script type="text/javascript"> console.assert( 1 ,"结果为假"); var code = 1024; console.assert(year == 2048 ,"code不等"); </script> </html>
7.
<!DOCTYPE html> <html> <head> <title>追踪函数</title> </head> <body> <div id="bice"> <p>我爱程序设计</p> </div> </body> <script type="text/javascript"> function test(a,b){ console.trace(); } test(1,1); </script> </html>
8.
<!DOCTYPE html> <html> <head> <title>计时</title> </head> <body> <div id="bice"> <p>我爱程序设计</p> </div> </body> <script type="text/javascript"> console.time("计时开始"); for(var i=0;i<1000;i++){ for(var j=0;j<1000;j++){} } console.timeEnd("计时结束"); </script> </html>
9.
<!DOCTYPE html> <html> <head> <title>性能分析</title> </head> <body> <div id="bice"> <p>我爱程序设计</p> </div> </body> <script type="text/javascript"> function Test(){ alert("性能测试"); for(var i=0;i<1000;i++){ for (var i = 0; i < 1000; i++) { for (var i = 0; i < 1000; i++) {} } } } console.profile('性能分析器'); Test(); console.profileEnd(); </script> </html>
