1.在页面中引入js文件
官网:http://log4javascript.org/index.html
```javascript
<script src="http://cdn.bootcss.com/log4javascript/1.4.3/log4javascript.min.js"></script>
```
2.初始化
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
<script type= "text/javascript" >
//启用javascript 日志功能
var logger = log4javascript.getLogger( "main" );
log4javascript.setEnabled( false );
var appender = new log4javascript.InPageAppender();
appender.layout.pattern='%d{yyyy-MM-dd HH:mm:ss,SSS} [%c] %-5p - %m{1}%n';
appender.visible= false ;
logger.addAppender(appender);
logger.debug( "This is a debugging message from the log4javascript in-page page" );
document.onkeydown = function (evt) {
var VK_F9=120;
//兼容IE和Firefox获得keyBoardEvent对象
var evt = (evt) ? evt : ((window.event) ? window.event : "" );
//兼容IE和Firefox获得keyBoardEvent对象的键值
var key = evt.keyCode?evt.keyCode:evt.which;
if (evt.ctrlKey && evt.altKey && key == VK_F9){
if (appender.visible){
log4javascript.setEnabled( false );
logger.info( "隐藏记录日志." );
appender.hide();
appender.visible= false ;
} else {
log4javascript.setEnabled( true );
logger.info( "显示记录日志." );
appender.show();
appender.visible= true ;
}
}
};
</script> |
3.总结
现在你就可以在页面上通过 Ctrl+Alt+F9 来开始/显示js日志 或结束/隐藏js日志
效果图: