What caused the unexpected length return from Monaco Editor's getValue() function?

Question

What caused the unexpected length return from Monaco Editor's getValue() function?

Using the editor.setValue() method, I successfully rendered a string to the editor and the result in the render view was as expected.

However, upon using editor.getValue() again and printing the length of the resulting string, I encountered an unexpected outcome.

Below is the code snippet:

var value = `asfdasfsa\n\nasdfasdfasdfal;k l;'k \r\n \r\n  \r\n   k 'a\r\n  skd \r\n   a\r\n   d \r\n    \r\n     sas\r\n      dffa\r\n       sd\r\n         fsd\r\n          f\r\n          sfasfdasfasfdasdffasfaf\n\n          fa ljjflkajl\n\n          false\n\n\r\n\n          A\r\n          jpakfafafafaffaffaffafafewfwe\n          `;
          
console.log(value.length); // 280
var editor = monaco.editor.create(document.getElementById('container'), {
    value: value,
    language: 'javascript',
    lineNumbers: 'off',
    roundedSelection: false,
    scrollBeyondLastLine: false,
    readOnly: false,
    theme: 'vs-dark'
});

console.log(editor.getValue().length) // 290

This issue has been puzzling me for quite some time, and I am still searching for a resolution.

If anyone could provide some insights or solutions to this problem, I would greatly appreciate it. Thank you!~~

javascript typescript editor monaco-editor

Answer 1

Answer №1

It seems like there is a discrepancy between the values 280 and 290 because Monaco appears to insert \r before any occurrence of \n in the string that lacks a pre-existing \r (essentially standardizing all end-of-line characters within the string). Modifying your final console.log statement to be

console.log(JSON.stringify(editor.getValue()), editor.getValue().length)

will reveal the alterations in value, with additional \r's included.

The insight provided in this comment implies that Monaco dissects the input string into lines (identifying occurrences of \r\n, \r, or \n). The result of editor.getValue() will present the individual lines combined using the same line separator utilized during editor initialization, resulting in a differing character count when compared to the original input string.

If you copy the following code snippet into the Monaco Playground, you will notice the introduction of supplementary \r's, causing the string obtained from the editor (editor.getValue()) to be longer by 2 characters than the initially supplied value (value):

var value = `'line 1'\n\'line 2'\r\r\n'line 3'`;

console.log(JSON.stringify(value), value.length); // "'line 1'\n'line 2'\r\r\n'line 3'" 28
var editor = monaco.editor.create(document.getElementById('container'), {
    value: value,
    language: 'javascript',

    lineNumbers: 'off',
    roundedSelection: false,
    scrollBeyondLastLine: false,
    readOnly: false,
    theme: 'vs-dark'
});

console.log(JSON.stringify(editor.getValue()), editor.getValue().length) // "'line 1'\r\n'line 2'\r\n\r\n'line 3'" 30

Answer 2

It seems like there is a discrepancy between the values 280 and 290 because Monaco appears to insert \r before any occurrence of \n in the string that lacks a pre-existing \r (essentially standardizing all end-of-line characters within the string). Modifying your final console.log statement to be

console.log(JSON.stringify(editor.getValue()), editor.getValue().length)

will reveal the alterations in value, with additional \r's included.

The insight provided in this comment implies that Monaco dissects the input string into lines (identifying occurrences of \r\n, \r, or \n). The result of editor.getValue() will present the individual lines combined using the same line separator utilized during editor initialization, resulting in a differing character count when compared to the original input string.

If you copy the following code snippet into the Monaco Playground, you will notice the introduction of supplementary \r's, causing the string obtained from the editor (editor.getValue()) to be longer by 2 characters than the initially supplied value (value):

var value = `'line 1'\n\'line 2'\r\r\n'line 3'`;

console.log(JSON.stringify(value), value.length); // "'line 1'\n'line 2'\r\r\n'line 3'" 28
var editor = monaco.editor.create(document.getElementById('container'), {
    value: value,
    language: 'javascript',

    lineNumbers: 'off',
    roundedSelection: false,
    scrollBeyondLastLine: false,
    readOnly: false,
    theme: 'vs-dark'
});

console.log(JSON.stringify(editor.getValue()), editor.getValue().length) // "'line 1'\r\n'line 2'\r\n\r\n'line 3'" 30

What caused the unexpected length return from Monaco Editor's getValue() function?

Answer №1

Similar questions

Is there a JavaScript code available for analyzing a URL and creating a summary similar to Google Buzz?

Is it more effective to specify the class within the selector when using jQuery to remove a class?

What steps can I take to generate 12 random div elements using jQuery out of a pool of 30?

Changing the ID of a textbox can be done by modifying the corresponding

What is the best way to modify the values of this variable across different modules?

What is the best way to combine and connect form data with existing POST data in PHP to create one cohesive text file?

Leverage NodeJS data within Angular framework

Guide on invoking an Angular 1.5 component with a button press

JSGrid not displaying any information from the JSON source

Retrieve all the data enclosed within the span tags

Is it possible to access a class with protected/private fields written in TypeScript from outside the class in JavaScript?

The error message "Attempting to send a message using an undefined 'send' property in the welcomeChannel" is displayed

How can I make sure my rows are properly aligned using the Grid

Clicking on an element in Reactjs will result in the value being

Displaying subsets of data based on the identifier of the primary array

What is the best way to display index.ejs when the input field is blank?

`Get the height of a specific element within a FlatList using the index property in React Native`

Employing the keyof operator with the typeof keyword to access an object

Switch component state not refreshing

How to host two Node.js socket.io projects on one URL