How can I add a JS script only to my homepage?

[Marb]

I want to add a JS script to my homepage. 

I managed to to do this by adding the script code before 
{% section 'footer' %}

in theme.liquid

However this adds it to every page. How can i do this just for the homepage? Which file would I need to edit.

[Marb]

Solved w/ Custom liquid in theme editor

[KetanKumar]

@Marb 

yes please try this way

{% if template contains 'index' %}
  your custom script 
{% endif %}

[alantabs]

Where do you pace this? Just before  </body> in theme.liquid?