demo/typescript.js
function readConfigFile(fileName, readFile) {
        var text = "";
        try {
            text = readFile(fileName);
        }
        catch (e) {
            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
        }
        return parseConfigFileTextToJson(fileName, text);
    }
function readConfigFile(fileName, readFile) {
        var text = "";
        try {
            text = readFile(fileName);
        }
        catch (e) {
            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
        }
        return parseConfigFileTextToJson(fileName, text);
    }
Read tsconfig.json file
@param fileName The path to the config file