How to install client side validation scripts

Steps to install cldr-data files that are required for client side validation of localized values as decimal numbers and date

Validating decimal numbers, dates and currency requires installing cldr and cldr-data scripts locally as below:

- in the projects root creat a new json file and name it libman.json the add the required libraries for localization as below:

  "version": "1.0",
  "defaultProvider": "jsdelivr",
  "libraries": [
      "library": "cldrjs@0.5.1",
      "destination": "wwwroot/lib/cldr"
      "library": "cldr-data@35.1.0",
      "destination": "wwwroot/lib/cldr-data"
      "library": "globalize@1.4.2",
      "destination": "wwwroot/lib/globalize"


When you save the file, it will automatically install all libraires to wwwroot/lib folder. But we still need the localized culture based scripts (e.g.: numbers, dates, ...etc).

After intalling is done, open wwwroot/lib/cldr-data/package.json file and add w code e the last closing paranthes }.

"peerDependencies": {
    "cldr-data": ">=26"

When you save the file it will download all localized systems for all cultures, this may take a while depending on your internet speed.


How to use all these scripts:

- Auto option :

See LocalizationValidationScripts TagHelper for details.

- Manual option :

create a new partial view under Pages/Shared folder and name it : _LocalizationValidationScriptsPartial.cshtml and add nsert below code :

<!-- cldr scripts (needed for globalize) -->
<script src="/lib/cldr/dist/cldr.min.js"></script>
<script src="/lib/cldr/dist/cldr/event.min.js"></script>
<script src="/lib/cldr/dist/cldr/supplemental.min.js"></script>

<!-- globalize scripts -->
<script src="/lib/globalize/dist/globalize.min.js"></script>
<script src="/lib/globalize/dist/globalize/number.min.js"></script>
<script src="/lib/globalize/dist/globalize/date.min.js"></script>
<script src="/lib/globalize/dist/globalize/currency.min.js"></script>

<!-- this file can be downloaded from : -->
<!-- -->
<script src=""></script>

<!-- code to get check if current cultures scripts are exists -->
<!-- if not, select parent cultures scripts -->
@inject Microsoft.AspNetCore.Hosting.IHostingEnvironment HostingEnvironment
    string GetDefaultLocale()
        const string localePattern = "lib\\cldr-data\\main\\{0}";
        var currentCulture = System.Globalization.CultureInfo.CurrentCulture;
        var cultureToUse = "en"; //Default regionalisation to use

        if (System.IO.Directory.Exists(System.IO.Path.Combine(HostingEnvironment.WebRootPath, string.Format(localePattern, currentCulture.Name))))
            cultureToUse = currentCulture.Name;
        else if (System.IO.Directory.Exists(System.IO.Path.Combine(HostingEnvironment.WebRootPath, string.Format(localePattern, currentCulture.TwoLetterISOLanguageName))))
            cultureToUse = currentCulture.TwoLetterISOLanguageName;

        return cultureToUse;

<script type="text/javascript">
    var culture = "@GetDefaultLocale()";
        $.get("/lib/cldr-data/main/" + culture + "numbers.json"),
        $.get("/lib/cldr-data/main/" + culture + "/currencies.json"),
        $.get("/lib/cldr-data/main/" + culture + "/ca-gregorian.json"),
        $.get("/lib/cldr-data/main/" + culture + "/timeZoneNames.json"),
    ).then(function () {
        // Normalize $.get results, we only need the JSON, not the request statuses.
        return [].slice.apply(arguments, [0]).map(function (result) {
            return result[0];
    }).then(Globalize.load).then(function () {

Finally, use the partial after the default apps valdiation cripts partial view where you need to validiate localized input fields .

<partial name="_ValidationScriptsPartial.cshtml" />
<partial name="_LocalizatonValidationScriptsPartial.cshtml" />