lz在用element-ui时候 用到Cascader 级联选择器多选的时候 是要进行通过子节点查找所有的父节点的需求；于是有了下面的代码:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>find family</title>
<script type="text/javascript">
var json = [{
id: 1,
parentId: null,
children: [{
id: 10,
parentId: 1,
children: [{
id: 101,
parentId: 10
}]
}, {
id: 11,
parentId: 1,
children: [{
id: 110,
parentId: 11
}]
}]
}]
</script>
<script type="text/javascript">
var parentNode = null;
var node = null;
function getNode(json, target) {
for (var i = 0; i < json.length; i++) {
if (node) {
break;
}
var obj = json[i];
if (!obj || !obj.id) {
continue;
}
if (obj.id == target) {
node = obj;
if (obj.parentId) {
parentNode = { id: obj.parentId };
}
break;
} else {
if (obj.children && obj.children.length != 0) {
getNode(obj.children, target)
} else {
continue;
}
}
}
if (!node) {
parentNode = null;
}
return {
parentNode: parentNode,
node: node
};
}
var query = 101;
var result = [];
var getResult = function (json, query) {
node = null;
parentNode = null;
var obj = getNode(json, query);
if (obj.parentNode) {
getResult(json, obj.parentNode.id);
result.push(obj.parentNode.id);
}
return result;
}
getResult(json, query);
console.log(result);
</script>
</head>
<body>
</body>
</html>
改某个网友的代码；之前的这位网友写的是有bug的；