Added return type as scopedvalue and removed unwanted changes

Author: subhajit20

lib/api/web-element/isVisible.js

@@ -0,0 +1,29 @@
+/**
+ * Returns true if the element is visisble.
+ *
+ * For more info on working with DOM elements in Nightwatch, refer to the <a href="https://nightwatchjs.org/guide/writing-tests/finding-interacting-with-dom-elements.html">Finding & interacting with DOM Elements</a> guide page.
+ *
+ * @example
+ * export default {
+ *   demoTest(browser: NightwatchAPI): void {
+ *     const result = browser.element('#main ul li a.first').isVisible();
+ *       .assert.valueEquals('custom text');
+ *   },
+ *
+ *   async demoTestAsync(browser: NightwatchAPI): Promise<void> {
+ *     const result = await browser.element('#main ul li a.first').isVisible();
+ *     console.log('element text:', result);
+ *   }
+ * }
+ *
+ * @since 3.0.0
+ * @method isVisible
+ * @memberof ScopedWebElement
+ * @instance
+ * @syntax browser.element(selector).isVisible()
+ * @see https://www.w3.org/TR/webdriver#dfn-get-element-text
+ * @returns {ScopedValue<string>}
+ */
+module.exports.command = function() {
+  return this.runQueuedCommandScoped('isElementDisplayed');
+};

types/tests/webElement.test-d.ts

@@ -140,6 +140,7 @@ describe('new element() api', function () {
     expectType<ElementValue<string | null>>(elem.getProperty('property-name'));
     expectType<ElementValue<string | null>>(elem.getAttribute('attrib-name'));
     expectType<ElementValue<string | null>>(elem.getValue());
+    expectType<ElementValue<string | null>>(elem.isVisible());
 
     expectType<ElementValue<ScopedElementRect>>(elem.getRect());
     expectType<ElementValue<ScopedElementRect>>(elem.getSize());

types/web-element.d.ts

@@ -188,6 +188,8 @@ export interface ScopedElement extends Element, PromiseLike<WebElement> {
   rightClick(): Promise<WebElement>;
 
   waitUntil(signalOrOptions: WaitUntilActions | WaitUntilOptions, waitOptions?: WaitUntilOptions): Promise<WebElement>;
+
+  isVisible: ElementValue<string | null>;
 }
 
 type WaitUntilOptions = {