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Vue is a popular front-end framework. Various errors and problems are often encountered when developing applications. Among them, Uncaught (in promise) TypeError is a common error type. In this article, we will discuss its causes and solutions.
2.1. An undefined method or property is called on a Promise object, resulting in a TypeError error.
2.2. Errors are not handled correctly in the Promise object, resulting in error information not being captured.
2.3. The Promise object returned an object of non-Promise type, and an error occurred during processing.
3.1. When processing callback functions asynchronously, use try-catch blocks to catch exceptions and Handle errors.
You can use the following code as an example:
async function getUserInfo(){
try{ let result = await axios.get('http://localhost:3000/getUserInfo') console.log(result) }catch(error){ console.log(error) }
}
3.2. When processing Promise objects, ensure that all unstable Promise objects are all handled correctly. An unstable Promise object refers to a Promise object that may encounter errors during processing. This type of Promise object requires error handling.
3.3. When using asynchronous requests, ensure that all Promise objects run normally, use the async and await keywords correctly, and ensure that exceptions are caught and errors handled in asynchronous requests.
4.1. Use the debugging tools provided by the browser to view the error information in the console, and Find the line of code where the error occurred.
4.2. In the line of code where the error occurs, check whether the code is correct. If a code error is found, the code needs to be modified.
4.3. Track and process uncaught error information. If the error information comes from back-end data, back-end personnel need to provide corresponding solutions.
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