


js ideas and sample code to realize the effect of clicking on a small picture to see the big picture_javascript skills
DOM: It is to use JavaScript to operate HTML nodes.
Knowledge points:
Convert HTML into a DOM tree
When you see HTML, you will draw a DOM tree.
Create node, add node, delete node
varnodeObj = document.createElement("node name"); //Create element node
document .createTextNode("Text"); //Create text node
Parent node.appendChild(child node); //Add child node to parent node
Parent node.removeChild(child Node);
//Get node
document.getElementById("id number");
document.getElementsByTagName("html tag name")[0];
Parent node.getElementsByTagName("html tag name")[0];
//Get the node of the child element
Parent node.childNodes
Parent node.firstChild
Parent node.lastChild
//Node attributes
nodeType 1 element node 2 attribute node 3 text node
nodeName element Used by nodes, return the uppercase string of the label name
nodeValue Used by text nodes, return or set text
//Get sibling nodes
Current node.nextSiblings
Set the attributes of the node
Node.setAttribute(attribute name, value);
Node.getAttribute(attribute name);
p. setAttrubute("style","color:red;font-size:20px;");
//General approach, you can set or get the
node. Attribute name
Set text
Text node.nodeValue=text;
Case: Click on the small image to see the larger image

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