# Any demo about replaceInjectedVars?

**URL:** <https://discuss.elastic.co/t/any-demo-about-replaceinjectedvars/76247>\
**Category:** Kibana\
**Created:** [February 23, 2017, 3:00pm UTC](https://discuss.elastic.co/t/any-demo-about-replaceinjectedvars/76247 "2017-02-23T15:00:45Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![whoami](https://avatars.discourse-cdn.com/v4/letter/w/a9a28c/32.png) [@whoami](https://discuss.elastic.co/u/whoami)\
**Post date:** [February 23, 2017, 3:00pm UTC](https://discuss.elastic.co/t/any-demo-about-replaceinjectedvars/76247/1 "2017-02-23T15:00:45Z")

</div>

I found a snippet in function `getKibanaPayload`:

```auto
      vars: await reduceAsync(
        uiExports.injectedVarsReplacers,
        async (acc, replacer) => await replacer(acc, request, server),
        defaults(await app.getInjectedVars() || {}, uiExports.defaultInjectedVars)
      )

```

I have no idea about:

```auto
        uiExports.injectedVarsReplacers,
        async (acc, replacer) => await replacer(acc, request, server),

```

any introduce about injectedVarsReplacers? and what's this ``` async (acc, replacer) =\> await replacer(acc, request, server)

```auto

```

---

<div class="post-metadata">

**Author:** ![Bargs](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bargs/32/5429_2.png) [@Bargs](https://discuss.elastic.co/u/Bargs)\
**Post date:** [February 23, 2017, 9:35pm UTC](https://discuss.elastic.co/t/any-demo-about-replaceinjectedvars/76247/2 "2017-02-23T21:35:16Z")

</div>

Hi @whoami,

`replaceInjectedVars` is a property you can define in the UIExports in your plugin definition. It allows your plugin to make variables available to every application. You can read a bit more about it in the PR description that added the functionality: [https://github.com/elastic/kibana/pull/9071](https://github.com/elastic/kibana/pull/9071)

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 23, 2017, 9:35pm UTC](https://discuss.elastic.co/t/any-demo-about-replaceinjectedvars/76247/3 "2017-03-23T21:35:31Z")

</div>

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