求助：使用JavaScript解析Coingecko API数据失败

Hey there! Let's fix that parsing issue you're having with the CoinGecko API right away.

The Core Issue #

When using jQuery's $.getJSON() method, it automatically parses the JSON response into a ready-to-use JavaScript object/array for you. Your code is trying to run JSON.parse(data) on an already parsed object, which causes a parsing error because JSON.parse() only works with string inputs.

Corrected Code #

Here's the fixed version of your code, with explanations of the changes:

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$.getJSON("https://api.coingecko.com/api/v3/exchanges", function(data) {
  // data is already a parsed array of exchange objects—no need to reparse!
  console.log(data[0]['id']); // Directly access the first exchange's ID
});
</script>

Key Fixes Breakdown #

• Removed the redundant var objArray = JSON.parse(data); line: The data parameter passed to your callback is already the parsed array of exchange data.
• Reordered script tags: Ensured the jQuery library loads before your custom script, so the $ function is available when your code runs.

Verify the Fix #

When you run this corrected code, your browser's console should log the ID of the first exchange (typically "binance") without any parsing errors.

内容的提问来源于stack exchange，提问作者Yusuf