This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The reserve() property of the BudgetService interface returns a Promise that resolves to a boolean indicating whether the requested budget operation can be reserved.
var aPromise = BudgetService.reserve(operation);
aPromise.then(function(boolean){ ... }); A Promise that resolves to a boolean.
| Specification | Status | Comment | 
|---|---|---|
| Web Budget API The definition of 'reserve()' in that specification.  |  Draft | Initial definition. | 
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 55 | ? | ? | ? | 42 | ? | 
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | 55 | 55 | ? | ? | 42 | ? | 6.0 | 
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
    https://developer.mozilla.org/en-US/docs/Web/API/BudgetService/reserve