How to click the link icon in CK editor - selenium

Question

When I click the link icon in ck editor initially it worked, but when I re-run the code, it's not clicking the link icon in the ck editor.
This is the command I used initially:
driver.findElement(By.xpath("//*[#id='cke_29']/span[1]")).click();

Answer 1

Use WebDriverWait to handle dynamic element.
WebDriverWait wait = new WebDriverWait(driver, 30);
wait.until(ExpectedConditions.elementToBeClickable(By.xpath("//a[starts-with(#id,'cke_')][#class='cke_button cke_button__link cke_button_off']"))).click();

Answer 2

As #akshay-patil commented use the a tag. The reason is that the <a> tag is the link itself... not the span!
You should use:
driver.findElement(By.xpath("//*[#id='cke_29']")).click();
Hope this helps!

Answer 3

The desired element is a JavaScript enabled element so to click() on the element you have to induce WebDriverWait for the element to be clickable and you can use either of the following Locator Strategies:
Using CSS_SELECTOR:
new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.cssSelector("a.cke_button.cke_button__link.cke_button_off[id^='cke_'][title^='Link']>span.cke_button_icon.cke_button__link_icon"))).click();
Using XPATH:
new WebDriverWait(driver, 20).until(ExpectedConditions.elementToBeClickable(By.xpath("//a[#class='cke_button cke_button__link cke_button_off' and starts-with(#id,'cke_')][starts-with(#title,'Link')]/span[#class='cke_button_icon cke_button__link_icon']"))).click();