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FF134 Promise.try() relnote/expr feature #36958

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Nov 25, 2024
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FF134 Promise.try() relnote/expr feature #36958

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FF134 Promise.try() relnote/expr feature
hamishwillee Nov 25, 2024
d06655e
Merge branch 'main' into ff134_js_promise_try_relnote
bsmth Nov 25, 2024
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Update files/en-us/mozilla/firefox/releases/134/index.md
bsmth Nov 25, 2024
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40 changes: 0 additions & 40 deletions files/en-us/mozilla/firefox/experimental_features/index.md
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Expand Up @@ -1288,46 +1288,6 @@ This includes: `SVGPathSegList`, [SVGPathElement.getPathSegAtLength()](/en-US/do

## JavaScript

### Promise.try()

{{jsxref("Promise.try()")}} is a convenience method that takes a callback of any kind (returns or throws, synchronously or asynchronously) and wraps its result in a {{jsxref("Promise")}} so that promise semantics (e.g. {{jsxref("Promise.then", ".then()")}}, {{jsxref("Promise.catch", ".catch()")}}) can be used to handle it ([Firefox bug 1905364](https://bugzil.la/1905364)).

<table>
<thead>
<tr>
<th>Release channel</th>
<th>Version added</th>
<th>Enabled by default?</th>
</tr>
</thead>
<tbody>
<tr>
<th>Nightly</th>
<td>132</td>
<td>No</td>
</tr>
<tr>
<th>Developer Edition</th>
<td>-</td>
<td>-</td>
</tr>
<tr>
<th>Beta</th>
<td>-</td>
<td>-</td>
</tr>
<tr>
<th>Release</th>
<td>-</td>
<td>-</td>
</tr>
<tr>
<th>Preference name</th>
<td colspan="2"><code>javascript.options.experimental.promise_try</code></td>
</tr>
</tbody>
</table>

### JSON.parse with source

The [`JSON.parse` source text access proposal](https://github.com/tc39/proposal-json-parse-with-source) extends [`JSON.parse`](/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse) behavior to provide features to mitigate issues around loss of precision when converting values such as large floats and date values between JavaScript values and JSON text. ([Firefox bug 1913085](https://bugzil.la/1913085), [Firefox bug 1925334](https://bugzil.la/1925334)).
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3 changes: 3 additions & 0 deletions files/en-us/mozilla/firefox/releases/134/index.md
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Expand Up @@ -22,6 +22,9 @@ This article provides information about the changes in Firefox 134 that affect d

### JavaScript

- The {{jsxref("Promise.try()")}} convenience method is now supported.
The method takes a callback of any kind (a function that returns or throws, synchronously or asynchronously) and wraps its result in a {{jsxref("Promise")}}.
This allows you to use promise semantics ({{jsxref("Promise.then", ".then()")}}, {{jsxref("Promise.catch", ".catch()")}}) to handle the result from any kind of method. ([Firefox bug 1917879](https://bugzil.la/1917879) and [Firefox bug 1905364](https://bugzil.la/1905364)).
- {{jsxref("Intl.DurationFormat")}} is supported, enabling locale-sensitive formatting of durations. ([Firefox bug 1648139](https://bugzil.la/1648139)).

#### Removals
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