Sometimes Web developer needs to receive an object and to find all the spans inside it. The best way to find items is to wrap the object inside a jQuery object and then use the find method to pass in a string query:
$(obj).find(“span”);
If obj is the JavaScript document object, this statement retrieves all the spans in the page.
Web developer can find check boxes that have been selected in a list, by encapsulating element in a jQuery object and then use the query illustrated in the article “How to query the DOM using jQuery”.
$(obj).$(“:checkbox:checked”);
Web developer can find all the children of the treeview starting from the tree element, by using find method.
$(tree).find(“li”);
In this case the find method searches recursively between the children, but if Web developer needs only direct children, he/she has to use the children method:
$(tree).children(“li”);
Web developer can use parent method when he/she needs parent element of the object:
$(tree).parent(“li”);
When Web developer passes a string to the $ method, he/she performs a query. When he/she passes an object, it’s included in a jQuery object that he/she can then query using methods.
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