Function insertCustomApp

src/apply/apply.go:270–379

(jsPath string, flags Flag)

}

func insertCustomApp(jsPath string, flags Flag) {
	utils.ModifyFile(jsPath, func(content string) string {
		// React lazy loading patterns for dynamic imports
		reactPatterns := []string{
			// Sync pattern: X.lazy((() => Y.Z(123).then(W.bind(W, 456))))
			`([\w_\$][\w_\$\d]*(?:\(\))?)\.lazy\(\((?:\(\)=>|function\(\)\{return )(\w+)\.(\w+)\(["']?[\w-]+["']?\)\.then\(\w+\.bind\(\w+,["']?[\w-]+["']?\)\)\}?\)\)`,
			// Async pattern (1.2.78+): m.lazy(async()=>{...await o.e(123).then(...)})
			`([\w_\$][\w_\$\d]*)\.lazy\(async\(\)=>\{(?:[^{}]|\{[^{}]*\})*await\s+(\w+)\.(\w+)\(["']?[\w-]+["']?\)\.then\(\w+\.bind\(\w+,["']?[\w-]+["']?\)\)`,
			// Async Promise.all pattern (1.2.78+): m.lazy(async()=>await Promise.all([Y.Z(123),...]).then(...))
			// Capture the chunk loader from the first entry inside Promise.all, not from .bind()
			`([\w_\$][\w_\$\d]*(?:\(\))?)\.lazy\(async\(\)=>await\s+Promise\.all\(\[(\w+)\.(\w+)\(["']?[\w-]+["']?\)`,
		}

		// React element/route patterns for path matching
		elementPatterns := []string{
			// JSX pattern (1.2.78+): (0,S.jsx)(se.qh,{path:"/collection/*",element:...})
			// Settings page should be more consistent with having no conditional renders
			`(\([\w$\.,]+\))\(([\w\.]+),\{path:"/settings(?:/[\w\*]+)?",?(element|children)?`,
			// createElement pattern: X.createElement(Y,{path:"/collection"...})
			`([\w_\$][\w_\$\d]*(?:\(\))?\.createElement|\([\w$\.,]+\))\(([\w\.]+),\{path:"\/collection"(?:,(element|children)?[:.\w,{}()$/*"]+)?\}`,
		}

		reactSymbs, matchedReactPattern := utils.FindSymbolWithPattern(
			"Custom app React symbols",
			content,
			reactPatterns)
		eleSymbs, matchedElementPattern := utils.FindSymbolWithPattern(
			"Custom app React Element",
			content,
			elementPatterns)

		if (len(reactSymbs) < 2) || (len(eleSymbs) == 0) {
			utils.PrintError("Spotify version mismatch with Spicetify. Please report it on our github repository.")
			utils.PrintInfo("Spicetify might have been updated for this version already. Please run `spicetify update` to check for a new version.")
			utils.PrintInfo("If one isn't available yet, please wait for an update to be released or downgrade Spotify to a supported version.")
			return content
		}

		appMap := ""
		appReactMap := ""
		appEleMap := ""
		cssEnableMap := ""
		appNameArray := ""

		// Spotify's new route system
		wildcard := ""
		if eleSymbs[2] == "" {
			eleSymbs[2] = "children"
		} else if eleSymbs[2] == "element" {
			wildcard = "*"
		}

		for index, app := range flags.CustomApp {
			appName := `spicetify-routes-` + app
			appMap += fmt.Sprintf(`"%s":"%s",`, appName, appName)
			appNameArray += fmt.Sprintf(`"%s",`, app)

			appReactMap += fmt.Sprintf(