<!DOCTYPE html>
<html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <script type="text/javascript"> var obj={ a:5, func:function(){ console.log(this.a); }, test:function(){ var that=this; setTimeout(function(){console.log(this);//window
that.func(); },1); } } obj.test();//5 </script> </body> </html>------------------------------------------------------------------------------------------------------------
<!DOCTYPE html>
<html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <script type="text/javascript"> var obj={ a:5, func:function(){ console.log(this.a); }, test:function(){ setTimeout(()=>{console.log(this);//window
this.func(); },1); } } obj.test();//5 </script> </body> </html>-------------------------------------------------------------------------------------------------------------
<!DOCTYPE html>
<html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <script type="text/javascript"> var a=10; var obj={ a:5, func:()=>{ console.log(this.a); }, test:function(){ setTimeout(()=>{console.log(this);//window
this.func(); },1); } } obj.test();//10 </script> </body> </html>