If you use jQuery and frequently look for css selector in the web page,this tool can help you save time.
Please open: DevTools > Elements > Selector (the side pane).
Select a tag and then a jQuery expression will be auto created and copyed to your clip board.
Click(left-click) any piece of the dom-like list block can change the result of expression.See the gif,notice the length and expression's change.
Copy only selector ( left-click ) & Copy tag's attributes (e.g. id,class,name,... ) ( right-click ).