To correct the ESLint error 'i.CLIEngine is not a constructor' in Visual Studio 2019 with ESLint version 8.57.0, you can follow these steps:
1. Navigate to the following file path and open the file in a text editor: C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\ServiceHub\Services\TypeScriptLintingService\TypeScriptLintingService.all.js. It is recommended to create a backup of the original file before proceeding.
2. Locate the function e.prototype.eslint within the file and replace it with the following code:
e.prototype.eslint = function(e) {
return new Promise(async (resolve) => {
try {
var config = JSON.parse(e);
var ESLintModule = this.dynamicRequire(config.linterPath + n.sep + "node_modules" + n.sep + "eslint");
var results = [];
if (ESLintModule.ESLint) {
var options = {
cwd: config.projectRoot,
resolvePluginsRelativeTo: config.linterPath
};
var eslintInstance = new ESLintModule.ESLint(options);
results = await eslintInstance.lintText(config.fileContents, { filePath: config.fileName });
} else {
var optionsLegacy = {
cwd: config.projectRoot,
ignorePattern: ["wwwroot/lib/**", "**/node_modules/**", "**/bower_components/**", "**/jspm_packages/**"],
resolvePluginsRelativeTo: config.linterPath
};
if (config.parserPath) {
optionsLegacy.parser = config.parserPath;
}
results = new ESLintModule.CLIEngine(optionsLegacy).executeOnText(config.fileContents, config.fileName).results;
}
var report = results[0];
if (report) {
report.messages.forEach(this.addRuleIdToParseError);
var validMessages = report.messages.filter((message) => message.ruleId != null);
validMessages.forEach(this.addLocationInfoFromSourceCode);
resolve({ lintMessages: validMessages });
} else {
resolve({});
}
} catch (error) {
resolve({ errorMessage: error.message });
}
});
}
3. After making the changes, save the file and restart Visual Studio to apply the update.
