Node.js Errors

by Online Tutorials Library July 14, 2022

Node.js Errors

The Node.js applications generally face four types of errors:

Standard JavaScript errors i.e. <EvalError>, <SyntaxError>, <RangeError>, <ReferenceError>, <TypeError>, <URIError> etc.
System errors
User-specified errors
Assertion errors

Node.js Errors Example 1

Let’s take an example to deploy standard JavaScript error – ReferenceError.

File: error_example1.js

 // Throws with a ReferenceError because b is undefined try {   const a = 1;   const c = a + b; } catch (err) {   console.log(err); } 

Open Node.js command prompt and run the following code:

Node.js error example 1

Node.js Errors Example 2

File: timer2.js

 const fs = require(‘fs’); function nodeStyleCallback(err, data) {  if (err) {    console.error(‘There was an error’, err);    return;  }  console.log(data); } fs.readFile(‘/some/file/that/does-not-exist’, nodeStyleCallback); fs.readFile(‘/some/file/that/does-exist’, nodeStyleCallback); 

Open Node.js command prompt and run the following code:

Node.js error example 2

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Node.js Errors

Node.js Errors

Node.js Errors Example 1

Node.js Errors Example 2

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