What is the best way to implement two separate fonts in a document using the Monaco editor?

I have implemented react-monaco-editor in my project.

In the overall CSS, I have defined a font family to be used as 

Helvetica, Tahoma, Arial, monospace
.

However, I also need to customize the font for a specific editor instance on the page to be "Fira Code", monospace. I have set this in the Editor's Optional configuration and successfully applied the new font.

The issue arises when the global font is being used to measure the width of the text within the editor, causing errors with renderWhitespace and display indent indicator functionalities. Despite attempting to use monaco.editor.remeasureFonts() in various methods such as Hooks or before rendering, the problem persists.

I suspect that specifying the font selection for measurement in monaco may hold the solution, but so far I have been unable to find the correct API documentation for this purpose.

javascriptcssreactjsmonaco-editorvisual-studio-monaco

Answer №1

Aha! The mystery is solved.

Upon inspecting the editor's source code, I discovered that my overarching style was causing issues with the temporary div width created by the editor for width calculations.

If you're interested, take a look at this file: https://github.com/microsoft/vscode/blob/d8bc1fa0ff/src/vs/editor/browser/config/charWidthReader.ts

My solution may seem silly, but it gets the job done: (The seemingly random 50000px number comes from the aforementioned file)

*:not(div[style*='50000px']) {
  font-family: Helvetica, Tahoma, Arial, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", "Fira Code", monospace;
}

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