Implicit & explicit wait in selenium with example

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What are the Explicit and implicit wait in selenium?

There are two types of wait in selenium :-
1). Explicit Wait
2). Implicit Wait
Explicit Wait:- Explicit wait will make your code to wait for certain condition to occur before moving forward.
This can be acheived with the combination of WebDriverWaitand Expected Conditions.
WebDriverWait by default calls ExpectedCondition to poll by every 500 milliseconds untill it returns successfully.
Implicit Wait:-Implicit wait will make the code to wait for an element to appear in DOM
Implicit wait timeout once set, is set for the lifetime to the WebDriver object Instance.

Example of Explicit wait in selenium :-

Here we will launch the google & search for "iamchandan.com", and will click on this reseult when link will get enable & until that it will wait.
public class Explicit
{
WebDriver driver;
@BeforeMethod
public void launch()
{
driver = new FirefoxDriver();
}
@Test
public void verify()throws Exception
{
driver.get("http://google.com");
WebElement element = driver.findElement(By.id("lst-ib"));
element.sendKeys("iamchandan.com");
driver.findElement(By.xpath("/html/body/div/div[3]/form/div[2]/div[2]/div[1]/div[1]/div[2]/div/div/div/button")).click();
(new WebDriverWait(driver, 10)).until(ExpectedConditions.elementToBeClickable(By.partialLinkText("Making Things Transparent")));//Explicit Wait
driver.findElement(By.partialLinkText("Making Things Transparent")).click();;
}
}

Example of Implicit wait in selenium :-

I will take same exaple as above, here it will wait for 3 seconds to appear text("iamchandan.com")
after that It will through TimeOutException.
public class Asser
{
WebDriver driver;
@BeforeMethod
public void launch()
{
driver = new FirefoxDriver();
}
@Test
public void verify()throws Exception
{
driver.get("http://google.com");
WebElement element = driver.findElement(By.id("lst-ib"));
element.sendKeys("iamchandan.com");
driver.findElement(By.xpath("/html/body/div/div[3]/form/div[2]/div[2]/div[1]/div[1]/div[2]/div/div/div/button")).click();
driver.manage().timeouts().implicitlyWait(3, TimeUnit.SECONDS); //this is implicit wait
driver.findElement(By.partialLinkText("Making Things Transparent")).click();;
}
}

Page Load Timeout command in selenium

It will set the amount of time to load a page before throwing the error.
Syntax :
driver.manage().timeouts().pageLoadTimeout(5. SECONDS);

Sleep command in selenium

It will set the amount of time to browser to wait, this is rarely used.
Syntax :
Thread.sleep(2000); //Time in milisecond.
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