The code has no immediate logical errors but can be improved and optimized:

1. Use Template Literals: The use of single quotes for strings inside the template expression {{ result || '-' }} is unnecessary when you're using the .toString() function later on in the same expression.

2. Boolean Check: The use of strict equality (===) with '0' is redundant because it will return false even if result is a number that equals zero (e.g., 0, -0). A simple check with loose equality (==) suffices.

3. Code Readability: While minor, using descriptive variable names could improve readability, such as changing result to something like responseData.

Here’s an updated version of the code:

<div class="card-container">
  <vue-custom-scrollbar max-height="350px" overflow-y-scroll>
    <el-card :shadow="'never'" :style="{ maxHeight: '350px', overflowY: 'scroll' }">
      {{ Number(responseData) === 0 ? 0 : responseData || '-' }}
    </el-card>
  </vue-custom-scrollbar>
</div>

This change ensures better JavaScript logic and improves readability while maintaining functionality.