VSCode firaCode iScript

settings.json

{
    "editor.fontFamily": "Fira Code iScript",
    "editor.fontSize": 15,
    "editor.tokenColorCustomizations": {
        "textMateRules": [
            {
                "scope": [
                    // the following elements will be in italic
                    //   (=Fira Code iScript)
                    "comment",
                    "keyword.control.import.js", // import
                    "keyword.control.export.js", // export
                    "keyword.control.from.js", // from
                    // "constant", // String, Number, Boolean…, this, super
                    "storage.modifier", // static keyword
                    "storage.type.class", // class keyword
                    "storage.type.php", // typehints in methods keyword
                    "keyword.other.new.php", // new
                    "entity.other.attribute-name", // html attributes
                    "fenced_code.block.language.markdown" // markdown language modifier
                ],
                "settings": {
                    "fontStyle": "italic"
                }
            },
            {
                "scope": [
                    // the following elements will be displayed in bold
                    "entity.name.type.class" // class names
                ],
                "settings": {
                    "fontStyle": "bold"
                }
            },
            {
                "scope": [
                    // the following elements will be displayed in bold and italic
                    "entity.name.section.markdown" // markdown headlines
                ],
                "settings": {
                    "fontStyle": "italic bold"
                }
            },
            {
                "scope": [
                    // the following elements will be excluded from italics 
                    //   (VSCode has some defaults for italics)
                    "invalid",
                    "keyword.operator",
                    "constant.numeric.css",
                    "keyword.other.unit.px.css",
                    "constant.numeric.decimal.js",
                    "constant.numeric.json",
                    "comment.block",
                    "entity.other.attribute-name.class.css"
                ],
                "settings": {
                    "fontStyle": ""
                }
            }
        ]
    }
}

Sources

https://thomasventurini.com/articles/setup-firacodeiscript-for-italic-fonts-in-vscode/
https://github.com/kencrocken/FiraCodeiScript
https://devdojo.com/tnylea/adding-cursive-fonts-to-vs-code