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# General samples (JavaScript SDK)

This topic includes samples that apply to all technologies.

## waitUntil demonstration

The following example demonstrates the waitUntil behavior.

- Demonstrates the waitUntil behavior when a condition is not met:

  1. Navigate to a certain URL that has a check box and make sure the check box is unchecked.
  2. Use waitUntil with a 3 second timeout to determine if the check box is checked. waitUntil is resolved to false after 3 seconds.

- Demonstrates the waitUntil behavior when a condition is met:

  1. Set the check box to selected.
  2. Use waitUntil to demonstrate that it is immediately resolved to true.

    var LFT = require("leanft");
    var expect = require("leanft/expect");
    var Web = LFT.Web;

    jasmine.DEFAULT_TIMEOUT_INTERVAL = 400000;

    describe("waitUntil samples", function () {
        var browser;
        beforeAll(function (done) {
            LFT.init();

            Web.Browser.launch(Web.BrowserType.Chrome).then(function (b) {
                browser = b;
            });

            LFT.whenDone(done);
        });

        afterAll(function(done){
            browser.close();
            LFT.cleanup();

            LFT.whenDone(done);
        });

        it("examples of waitUntil return code", function (done) {
            //navigate to a page with a checkbox
            browser.navigate("https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox");

            //describe the checkboxvar checkBox = browser.$(Web.Frame({
                    id:"frame_Basic_example",
                    name:""
                }
            )).$(Web.CheckBox({
                    type:"checkbox",
                    tagName:"INPUT",
                    name:""
                }
            ));

            checkBox.set(false);

            //condition function to check if the checkbox is setvar isChecked = checkBox.isChecked.bind(checkBox);

            LFT.SDK.waitUntil(isChecked, 3*1000).then(function (waitResult) {
                //after 3 seconds the waitUntil returns false, since condition is not met.
                expect(waitResult).toBeFalsy();
            });

            checkBox.set(true);

            LFT.SDK.waitUntil(isChecked, 3*1000).then(function (waitResult) {
                //waitUntil immediately returns true, since condition is met.
                expect(waitResult).toBeTruthy();
            });

            LFT.whenDone(done);
        });

    });

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