# No collapse possibility on elasticsearch-js?

**URL:** <https://discuss.elastic.co/t/no-collapse-possibility-on-elasticsearch-js/220935>\
**Category:** Elasticsearch\
**Created:** [February 26, 2020, 12:20am UTC](https://discuss.elastic.co/t/no-collapse-possibility-on-elasticsearch-js/220935 "2020-02-26T00:20:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Wassim\_Ben\_Amor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wassim_ben_amor/32/39799_2.png) [@Wassim\_Ben\_Amor](https://discuss.elastic.co/u/Wassim_Ben_Amor)\
**Post date:** [February 26, 2020, 12:20am UTC](https://discuss.elastic.co/t/no-collapse-possibility-on-elasticsearch-js/220935/1 "2020-02-26T00:20:53Z")

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Hello,  
When I try to use collapse parameter in my query,  
it throws an exception saying : contains unrecognized parameter: [collapse]  
How can I do field collapsing using a js client ?  
Thank you

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<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 25, 2020, 12:20am UTC](https://discuss.elastic.co/t/no-collapse-possibility-on-elasticsearch-js/220935/2 "2020-03-25T00:20:55Z")

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