Magento 2, how to add `attribute` and `custom option` of configuration product into cart?

by Bong Channarith   Last Updated July 16, 2018 05:09 AM

Using Magento 2.2, API, Configurable Product. I had read the Similar Question for add attributes with custom option but it cannot help me to understand. I need to create new Web Service for Add Product To Cart look like image below. Please help to explain me.

Add Configuration Product To Cart on Web Front End enter image description here

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