JSPM

import { VisulimaError } from "@visulima/error";

class MyError extends VisulimaError {
    constructor(message: string) {
        super({
            name: "MyError",
            message,
        });
    }
}

throw new MyError("My error message");

// or

const error = new MyError("My error message");

error.hint = "My error hint";

throw error;

import { getErrorCauses } from "@visulima/error";

const error = new Error("My error message");
const error2 = new Error("Nested Error");

error.cause = error2;

// The getErrorCauses function will return an array of all causes in the error in the order they occurred.
const causes = getErrorCauses(error);

console.log(causes);

// [
//     {
//         message: "My error message",
//         name: "Error",
//         stack: "Error: My error message\n    at Object.<anonymous> (/visulima/packages/error/src/index.ts:2:16)",
//     },
//     {
//         message: "Nested Error",
//         name: "Error",
//         stack: "Error: Nested Error\n    at Object.<anonymous> (/visulima/packages/error/src/index.ts:3:16)",
//     },
// ];

import { codeFrame } from "@visulima/error";

const source = "const x = 10;\nconst error = x.y;\n";
const loc = { column: 16, line: 2 };

const frame = codeFrame(source, { start: loc });

console.log(frame);
//   1 | const x = 10;
// > 2 | const error = x.y;
//     |                ^

import { parseStack } from "@visulima/error";

const error = new Error("My error message");

const stack = parseStack(error);

console.log(stack);

// [
//     {
//         column: 16,
//         file: "file:///Users/danielbannert/Projects/visulima/packages/error/src/index.ts",
//         line: 2,
//         methodName: "Object.<anonymous>",
//         raw: "    at Object.<anonymous> (/visulima/packages/error/src/index.ts:2:16)",
//         type: undefined, // optional property, can be undefined, "eval", "native", or "internal"
//         evalOrigin: undefined, // optional property only available if the stacktrace contains eval
//     },
//     ...and so on
// ];

import { loadSourceMap, originalPositionFor, sourceContentFor } from "@visulima/error";

const sourceMap = loadSourceMap("your_path/src/index.js"); // returns a TraceMap

const traced = originalPositionFor(sourceMap, { column: 13, line: 30 });

console.log(traced);

// {
//     column: 9,
//     line: 15,
//     name: "setState",
//     source: "your_path/src/index.js"
// }

console.log(sourceContentFor(sourceMap, traced.source)); // 'content for your_path/src/index.js'