How to use JavaScript to complete the linkage effect of provinces and cities

Province and city linkage effect

[DOM operations in HTML]

Some commonly used HTML DOM methods:

getElementById(id) - Get the node (element) with the specified id

appendChild(node) - Insert a new child node (element)

removeChild(node) - Remove the child node (element)

Some commonly used HTML DOM attributes:

innerHTML - the text value of the node (element)

parentNode - the parent node of the node (element)

childNodes - the node (element) )'s child node

attributes - the attribute node of the node (element)

Find the node:

getElementById() Returns the element with the specified ID.

getElementsByTagName() Returns a node list (collection/node array) containing all elements with the specified tag name.

getElementsByClassName() Returns a node list containing all elements with the specified class name.

Add node:

createAttribute() creates an attribute node.

createElement() Creates an element node.

createTextNode() Creates a text node.

insertBefore() Inserts a new child node before the specified child node.

appendChild() Adds a new child node to the specified node.

Delete node:

removeChild() deletes the child node.

replaceChild() Replaces child nodes.

Modify node:

setAttribute() Modify attribute

setAttributeNode() Modify attribute node

Code implementation

      
    --请选择-- 广东省 湖南省 福建省     

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