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March 30, 2018 06:29
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Using One Callback which accepts two arguements
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| function task(callback){ | |
| //do task | |
| if(failed){ | |
| callback(error,null); | |
| }else{ | |
| callback(null,error); | |
| } | |
| } | |
| //calling task | |
| task((err,data)=>{ | |
| if(err){ | |
| //handle error | |
| }else{ | |
| //handle data | |
| } | |
| }); |
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