jquery Learning Notes-selector-1

The $ () method in jquery is equivalent to the jquery () method, the former is more commonly used, and is shorthand for the latter. The jquery () method is typically used only when $ () conflicts with other languages.

The scope of the parent > child selector, the target of which is a subset of elements, the equivalent of a family of children, but does not include the grandchild, its invocation format: $ ("Parent > Child"), the children parameter gets the element is the parent selector of the sub-element , which represent a hierarchical relationship between them through the ">" symbol.

The Prev + next selector can look for the next "next" element immediately adjacent to the "prev" element, in the format: $ ("prev + next"),

Where the parameter prev is any valid selector, the parameter "next" is another valid selector, and the "+" between them represents an upper and lower hierarchical relationship, that is, the next element closest to the "prev" element is returned by the "next" selector and returns only one element.

The prev ~ Siblings selector finds adjacent elements after the Prev element, gets all adjacent elements behind the prev element, and calls the format: $ ("prev ~ siblings"), where the parameter prev and the siblings pass through "~" Symbols form a hierarchical, contiguous relationship that indicates that the elements acquired by the siblings selector are sibling elements after the Prev element.

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jquery Learning Notes-selector-1