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368. Using Boolean Operators in CSS selector







We can use the boolean operators in CSS selectors by:
  • adding more conditions (Example:  p[id='para1'][class='main] - Locates the paragraph elements which have id attribute value as 'para1' and class attribute value as 'main' ). 
  • adding :not to the conditions (Example: p:not(p[id='para1']) - Locates all the paragraph elements which don't have the id attribute value specified as 'para1' )
Lets Implement

First lets add more conditions to the CSS path by following the below steps:

1. Open http://compendiumdev.co.uk/selenium/basic_web_page.html in Firefox Browser
2. Click on the 'Firepath' tab, select the CSS option, enter the CSS path p[id='para1'][class='main']  into the text box as shown below and click on 'Eval' button:

3. Observe that all the paragraph elements having the id attribute value as  'para1' and the class attribute value as 'main'  got highlighted as shown below:

4. Now lets  enter the CSS path p[id^='p'][class$='b']  into the text box as shown below and click on 'Eval' button:

5. Observe that all the paragraph elements having the id attribute value starting with  'p' text and the class attribute value ending with 'b' text  got highlighted as shown below:

Now lets add :not to the conditions in the CSS path by following the below steps:

1. Open http://compendiumdev.co.uk/selenium/basic_web_page.html in Firefox Browser
2. Click on the 'Firepath' tab, select the CSS option, enter the CSS path p:not([id='para1'])  into the text box as shown below and click on 'Eval' button:


3. Observe that all the paragraph elements not having the id attribute value as 'para1' text  got highlighted as shown below:


4. Now lets identify the paragraph elements not having the id attribute value as 'para1' and having the class attribute value as 'sub'.  So enter the CSS path p:not([id='para1'])[class='sub']  into the text box as shown below and click on 'Eval' button:

5. Observe that all the paragraph elements not having the id attribute value as 'para1' and having the class attribute value as 'sub' got highlighted as shown below:


6. Now lets identify the paragraph elements not having the id attribute value as 'para1' and also not having the class attribute value as 'main'.  So enter the CSS path p:not([id='para1']):not([class='main'])  into the text box as shown below and click on 'Eval' button:


7. Observe that all the paragraph elements not having the id attribute value as 'para1' and not having the class attribute value as 'main' got highlighted as shown below:




Thats it with the boolean operators.




Please comment below to feedback or ask questions.

CSS selector Optimization will be explained in the next post.



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