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    Class MalformedRequestBodyError

    Thrown when a request body cannot be parsed as JSON.

    The cause is the platform SyntaxError the parse produced — kept for the log, never served: the caller-facing sentence is the fixed detail written here, composed only of framework-chosen words, so the masking exemption the brand earns cannot disclose body content (§3.7).

    try {
      const body = await ctx.request.json();
    } catch (error) {
      if (error instanceof MalformedRequestBodyError) {
        // Answer 400; `error.cause` is the underlying SyntaxError.
      }
    }

    0.5.0

    Hierarchy

    • Error
      • MalformedRequestBodyError
    Index
    constructor
    cause? message name stack? stackTraceLimit
    captureStackTrace prepareStackTrace
    cause?: unknown
    message: string
    name: "MalformedRequestBodyError" = 'MalformedRequestBodyError'

    Discriminant for consumers that cannot use instanceof across realms.

    stack?: string
    stackTraceLimit: number

    The Error.stackTraceLimit property specifies the number of stack frames collected by a stack trace (whether generated by new Error().stack or Error.captureStackTrace(obj)).

    The default value is 10 but may be set to any valid JavaScript number. Changes will affect any stack trace captured after the value has been changed.

    If set to a non-number value, or set to a negative number, stack traces will not capture any frames.

    • Creates a .stack property on targetObject, which when accessed returns a string representing the location in the code at which Error.captureStackTrace() was called.

      const myObject = {};
      Error.captureStackTrace(myObject);
      myObject.stack;  // Similar to `new Error().stack`

      The first line of the trace will be prefixed with ${myObject.name}: ${myObject.message}.

      The optional constructorOpt argument accepts a function. If given, all frames above constructorOpt, including constructorOpt, will be omitted from the generated stack trace.

      The constructorOpt argument is useful for hiding implementation details of error generation from the user. For instance:

      function a() {
        b();
      }

      function b() {
        c();
      }

      function c() {
        // Create an error without stack trace to avoid calculating the stack trace twice.
        const { stackTraceLimit } = Error;
        Error.stackTraceLimit = 0;
        const error = new Error();
        Error.stackTraceLimit = stackTraceLimit;

        // Capture the stack trace above function b
        Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
        throw error;
      }

      a();

      Parameters

      • targetObject: object
      • OptionalconstructorOpt: Function

      Returns void

    • Parameters

      • err: Error
      • stackTraces: CallSite[]

      Returns any

      https://v8.dev/docs/stack-trace-api#customizing-stack-traces

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