<pre class="link-defaults">

spec:infra; type:dfn; text:list

spec:dom; type:interface; text:Document

spec:dom;

type:dfn; for:/; text:document

type:interface; text:Document

spec:web-animations-1; type:dfn; text:start time

</pre>

<pre class="anchors">

Creates a new {{WorkletAnimation}} object using the following procedure:

1. Let |documentAnimatorDefinitions| be the associated [=document's=] <a>document animator

definitions</a> [=map=].

1. Let |documentAnimatorDefinitions| be the associated [=document's=] <a>document animator definitions</a> [=map=].

2. If |documentAnimatorDefinitions|[|animatorName|] does not [=map/exists=], [=throw=] an

[=TypeError=] and abort the following steps.

6. Let |effect| be the result corresponding to the first matching condition from below.

: If |effects| is a {{AnimationEffect}} object,

:: Let effect be |effects|.

: If |effects| is a [=list=] of {{AnimationEffect}}</a> objects,

: If |effects| is a [=list=] of {{AnimationEffect}} objects,

:: Let |effect| be a new {{WorkletGroupEffect}} with its children set to |effects|.

: Otherwise,

:: Let |effect| be undefined.

When a given worklet animation's [=replace state=] changes from [=active=] to either

[=persisted=] or [=removed=] run the procedure to

[=disassociate animator instance of worklet animation]= given the worklet animation as

[=disassociate animator instance of worklet animation=] given the worklet animation as

|workletAnimation|.