问题描述
我写了一个小函数来用TypeScript级联React和React Native中的错误:
/**
* Function that takes an error and trow an enriched error
* @param error the original error
* @param func the name of the function trowing the error
* @param params the parameters passer to the function
* @param custom a custom message to add*
* @returns an enriched error
*/
const throwR = (error: Error,func?: string,params?: any,custom?: string) => {
// Parse params in an human readable form
let parsedParams: string = ''
if (params && typeof params === 'object') {
try {
parsedParams = JSON.stringify(params)
} catch (err) {
parsedParams = `${params.toString()} (JSON.stringify returned: ${err})`
}
} else {
try {
parsedParams = params.toString()
} catch (err) {
parsedParams = `<params.toString(): ${err}>`
}
}
// Handle the case where no error message is provided
if (!error) {
try {
console.log(`on ${func}(${parsedParams})${' ' + custom}: No error message provided to throwR`)
} catch (err) {
console.log(`No error message provided to throwR and unable to build this message: ${err}`)
}
}
// build the error message
let message: string = ''
try {
message = `on ${func}(${parsedParams})${' ' + custom}: ${error}`
} catch (err) {
message = `${error} (Could not build enriched message: ${err})`
}
// build the new error
const newError = new Error(message)
// add the original error name
try {
newError.name = error.name
} catch (err) {
console.log(`on throwR,Could not add a name to the error: ${error}`)
}
// by the end,throw the error
throw newError
}
export default throwR
然后我将其用于:
const myFunction(params) => {
try {
// potentially faulty code
} catch (error) {
throwR(error,'myFunction',params,'custom message')
}
}
const myFunction(params) => {
try {
// potentially faulty code
} catch (error) {
throw new CustomError(error,customParameter)
}
}
我是一个初学者,还不太了解每种方法的含义。我想避免一个大的陷阱,该陷阱以后意味着我需要重构所有代码。
您能否解释一下每种方法的含义,并为我提供针对自定义错误和级联错误的正确方法?
谢谢
解决方法
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