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ethereum-token-balances-javascript
Code samples to retrieve multiple Ethereum token balances from addresses using GraphQL, ethers.js, and web3.js libraries
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
You have the code samples cloned and your environment set up. See the repository prepared for this post.
Etherplex is a library that consolidates the list of the ethers.js contract function calls into one JSON-RPC call on the multicall smart contract aggregate function, which iterates and executes the list of contract function calls.