Created
February 14, 2020 02:29
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[Javascript promise] How to do javascript promise #callback #promise
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| let p = new Promise((resolve, reject) => { | |
| var imgData = 'data'; // this is always true | |
| if (imgData) { | |
| // This happens when the imgData returns true | |
| resolve('Resolved'); | |
| } | |
| else { | |
| // This happens when imgData returns false; | |
| reject('Rejected'); | |
| } | |
| }) | |
| p.then((message) => { | |
| // Success, so you can do soemthing here, that happens AFTER imgdata is declared | |
| doc.addImage(imgData, 'JPEG', 20, 10, 50, 17) | |
| }).catch((message) => { | |
| // Error , so you can do something here to handle the error | |
| }); |
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