Which is better between XPath and CSS selector and why?

Xpath allows bidirectional flow which means the traversal can be both ways from parent to child and child to parent as well. Css allows only one directional flow which means the traversal is from parent to child only. Xpath is slower in terms of performance and speed. Css has better performance and speed than xpath.

Why CSS is preferred over XPath?

Advantages of Using CSS Selector

It’s faster than XPath. It’s much easier to learn and implement. You have a high chance of finding your elements. It’s compatible with most browsers to date.

Why CSS selector is faster than XPath in Selenium?

CSS selectors perform far better than Xpath and it is well documented in Selenium community. … IE does not have a native xpath engine, therefore selenium injects its own xpath engine for compatibility of its API. Hence we lose the advantage of using native browser features that WebDriver inherently promotes.

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Why CSS selectors have higher priority over XPath expressions?

> When compared to XPath Expressions, CSS Selectors locate the UI elements faster. … Selenium may not be able to locate few UI elements using XPath Expressions while executing the Automation scripts on Internet Explorer Browser.

Why XPath is better than other locators?

getElementById(), which is optimized by most browsers. But, finding elements using XPath is better for locating elements having complex selectors, and is no doubt the most flexible selection strategy. But it can be very slow, particularly in IE. … So, browser compatibility also makes a slight difference here and there.

Is XPath slower than CSS?

On a whole, Internet Explorer is slower than the other drivers, but between CSS and XPath it looks like XPath is actually faster than CSS. Chrome and Opera have some differences, albeit much smaller, but they sway in both directions. In some cases CSS is faster, and in others, XPath.

Which XPath is faster?

CSSSelector Locator

CSS Selector is best option if web element has no ID and name. CSS is faster than XPath.

The reason is that the infrastructure used to generate the XPath, doesn’t guarantee that the XPath will remain the same between two different executions. … The recommended way would be to use id or any other stable element identifier, or to search for a parent element and then use the relative XPath from that element.

How do I switch from XPath to CSS selector in Nightwatch?

By default, Nightwatch uses CSS selectors for its locator strategy. You can change this behavior for an individual test file by using the methods “useCss()” and “useXpath()”. These allow you to switch back and forth between CSS and XPath selectors.

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Why do we use XPath in Selenium?

XPath is a technique in Selenium to navigate through the HTML structure of a page. XPath enables testers to navigate through the XML structure of any document, and this can be used on both HTML and XML documents. This post looks at various ways to use the XPath element in Selenium to select various elements.

What is the main difference between Xpath and CSS selectors?

Xpath allows bidirectional flow which means the traversal can be both ways from parent to child and child to parent as well. Css allows only one directional flow which means the traversal is from parent to child only. Xpath is slower in terms of performance and speed. Css has better performance and speed than xpath.

Can xpath be used on HTML?

In an HTML document, everything is a node: The entire document is a document node. Every HTML element is an element node. The text inside HTML elements are text nodes.

Navigating through the HTML node tree using XPath.

Expression Description
text() Select the text content of a node

What is relative xpath?

Relative Xpath:

Relative Xpath starts from the middle of HTML DOM structure. It starts with double forward slash (//). It can search elements anywhere on the webpage, means no need to write a long xpath and you can start from the middle of HTML DOM structure.

How do you avoid stale element exception?

We can handle Stale Element Reference Exception by using POM. We could avoid StaleElementException using POM. In POM, we use initElements() method which loads the element but it won’t initialize elements.

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Why is relative XPath better than absolute?

Absolute Xpath: It uses Complete path from the Root Element to the desire element. Relative Xpath: You can simply start by referencing the element you want and go from there. Relative Xpaths are always preferred as they are not the complete paths from the root element. … So Always use Relative Xpaths in your Automation.

How does CSS selector find XPath?

Step 1: Type “css=input#Email” i.e. the locator value in the target box in the Selenium IDE and click on the Find button. Notice that the Email Text box would be highlighted. HTML tag – It is the tag which is used to denote the web element which we want to access. # – The hash sign is used to symbolize ID attribute.

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