Create isVisible.js

Fixed issue nightwatchjs#4037

lib/api/web-element/commands/isVisible.js

@@ -0,0 +1,35 @@
+/**
+ * Determines if an element is visible.
+ *
+ * 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
+ * describe('isVisible Demo', function() {
+ *
+ *   it('test isVisible', function(browser) {
+ *     browser.element('#search')
+ *       .isVisible()
+ *       .assert.equals(true);
+ *   });
+ *
+ *   it('test async isVisible', async function(browser) {
+ *     const result = await browser.element('#search').isVisible();
+ *     browser.assert.equal(result, true)
+ *   });
+ *
+ *   after(browser => browser.end());
+ * });
+ *
+ * @since 3.0.0
+ * @method isVisible
+ * @memberof ScopedWebElement
+ * @instance
+ * @syntax browser.element(selector).isVisible()
+ * @see https://www.w3.org/TR/webdriver/#is-element-visible
+ * @returns {ScopedValue<boolean>}
+ * @alias isDisplayed
+ */
+module.exports.command = function () {
+  return this.runQueuedCommandScoped('isElementVisible');
+};