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Masking TextBox

In order to mask your TextBoxes, you can benefit from vanilla-masker, a pure javascript string masking tool. It can be easily added to your project as a node module. The main idea is to get the whole text inside onTextChanged event and reassign with the masked text.


Go to: and follow the instructions to install the library with NPM.

Cheat Sheet:

  • Open Terminal in the workspace
  • Go to workspace/scripts and Run the command below:
npm install vanilla-masker --save
  • Require the module as follows in the javascript file you want to use:
const VMasker = require('vanilla-masker/lib/vanilla-masker');


const extend = require("js-base/core/extend");
const Page       = require("sf-core/ui/page");
const Color      = require("sf-core/ui/color");
const TextBox    = require("sf-core/ui/textbox");
const FlexLayout = require("sf-core/ui/flexlayout");
const VMasker    = require('vanilla-masker/lib/vanilla-masker');

const Page1 = extend(Page)(
    function(_super) {
        var self = this;

        this.onShow = function() {
            this.headerBar.visible = false;
            this.statusBar.visible = false;
            var maskedTextBox = new TextBox({
                left:0, top:0,
                height:75, width: 200, 
                positionType: FlexLayout.PositionType.ABSOLUTE,
                backgroundColor: Color.create("#9bc1ff")
            maskedTextBox.onTextChanged = function(e) {
                var maskedText = VMasker.toPattern(maskedTextBox.text, "(99) 9999-9999");
                maskedTextBox.text = maskedText;

module && (module.exports = Page1);

Masking TextBox