layui.tree(树组件)搜索功能

<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>tree</title>
	<link rel="stylesheet" href="../res/layui/css/layui.css">
	<style>
	.center {
	position: absolute;
	top: 50%;
	left: 50%;
	margin: -150px 0 0 -200px;
	width: 400px;
	height: 300px;
	border: 1px solid whitesmoke;
	}

	.current {
	background-color: #dbeef5
	}
	</style>
	</head>
	<body>
	<div class="center">
	<input id="search">
	<div id="test1"></div>
	</div>
	<script src="../res/layui/layui.js"></script>
	<script>
	layui.use('tree', function () {
	let tree = layui.tree,
	$ = layui.$;
	const data = [{
	title: '湖北' //一级菜单
	, children: [{
	title: '武汉' //二级菜单
	, children: [{
	title: '江汉区' //三级菜单
	}, {
	title: '洪山区' //三级菜单
	}, {
	title: '江岸区' //三级菜单
	}, {
	title: '汉阳区' //三级菜单
	}]
	}]
	}, {
	title: '浙江' //一级菜单
	, children: [{
	title: '杭州' //二级菜单
	, children: [{
	title: '西湖区' //三级菜单
	}, {
	title: '上城区' //三级菜单
	}, {
	title: '下城区' //三级菜单
	}, {
	title: '滨江区' //三级菜单
	}]
	}]
	}, {
	title: '陕西' //一级菜单
	, children: [{
	title: '西安' //二级菜单
	}]
	}];


	//渲染
	tree.render({
	elem: '#test1' //绑定元素
	, data: data
	, onlyIconControl: true
	, click: function (obj) {
	layer.msg(obj.data.title);
	}
	});

	// 树点击样式修改
	$("body").on("click", ".layui-tree-txt", function () {
	$(".layui-tree-entry").removeClass("current");
	$(this).parent().parent().addClass("current");
	});


	// treeId: tree所在的容器的id
	// filter: 对应的搜索框的selector或者dom对象
	// callback: 回调参数(树节点jquery对象, 输入框对象, 匹配到的节点数量)
	tree.syncLayuiTreeFilter = function (treeId, filter, callback) {
	let treeElem = $('#' + treeId), filterElem = $(filter);
	if (!filterElem.length \|\| !filterElem.length) {
	return;
	}
	// 搜索框的监听事件按实际需求来
	filterElem.unbind('change').change(function () {
	let that = this; //this;
	let value = $(that).val().trim();
	let HIDE = 'layui-hide';
	let hintClass = 'search_hit';
	// 先恢复现场
	treeElem.find('.' + HIDE).removeClass(HIDE);
	treeElem.find('.' + hintClass).removeClass(hintClass)
	// 如果有值筛选开始
	if (value) {
	$.each(treeElem.find('.layui-tree-txt'), function (index, elem) {
	elem = $(elem);
	let textTemp = elem.text();
	if (textTemp.indexOf(value) === -1) {
	// 不存在就隐藏
	elem.closest('.layui-tree-set').addClass(HIDE)
	} else {
	// 命中就添加一个class
	elem.addClass(hintClass)
	}
	});
	$.each(treeElem.find('.' + hintClass), function (index, elem) {
	elem = $(elem);
	// 取消隐藏所有父节点
	elem.parents('.layui-tree-set').removeClass(HIDE);
	// 展开所有父节点
	elem.parents('.layui-tree-set').each(function (i, item) {
	if (!$(item).hasClass('layui-tree-spread')) {
	$(item).find('.layui-tree-iconClick :first').click();
	}
	});
	});
	}
	typeof callback === 'function' && callback.call(that, treeElem, filterElem, treeElem.find('.' + hintClass).length);
	});
	};

	tree.syncLayuiTreeFilter('test1', '#search', function (treeElem, filterElem, hitNumbers) {
	console.log('hitNumbers', hitNumbers);
	layer.msg('找到' + hitNumbers + '个节点');
	});
	});
	</script>
	</body>
	</html>

效果演示

主体实现

// treeId: tree所在的容器的id
// filter: 对应的搜索框的selector或者dom对象
// callback: 回调参数(树节点jquery对象, 输入框对象, 匹配到的节点数量)
tree.syncLayuiTreeFilter = function (treeId, filter, callback) {
let treeElem = $('#' + treeId), filterElem = $(filter);
if (!filterElem.length || !filterElem.length) {
return;
}
// 搜索框的监听事件按实际需求来
filterElem.unbind('change').change(function () {
let that = this; //this;
let value = $(that).val().trim();
let HIDE = 'layui-hide';
let hintClass = 'search_hit';
// 先恢复现场
treeElem.find('.' + HIDE).removeClass(HIDE);
treeElem.find('.' + hintClass).removeClass(hintClass)
// 如果有值筛选开始
if (value) {
$.each(treeElem.find('.layui-tree-txt'), function (index, elem) {
elem = $(elem);
let textTemp = elem.text();
if (textTemp.indexOf(value) === -1) {
// 不存在就隐藏
elem.closest('.layui-tree-set').addClass(HIDE)
} else {
// 命中就添加一个class
elem.addClass(hintClass)
}
});
$.each(treeElem.find('.' + hintClass), function (index, elem) {
elem = $(elem);
// 取消隐藏所有父节点
elem.parents('.layui-tree-set').removeClass(HIDE);
// 展开所有父节点
elem.parents('.layui-tree-set').each(function (i, item) {
if (!$(item).hasClass('layui-tree-spread')) {
$(item).find('.layui-tree-iconClick :first').click();
}
});
});
}
typeof callback === 'function' && callback.call(that, treeElem, filterElem, treeElem.find('.' + hintClass).length);
});
};

tree.syncLayuiTreeFilter('test1','#search',function (treeElem, filterElem, hitNumbers) {
console.log('hitNumbers', hitNumbers);
layer.msg('找到' + hitNumbers + '个节点');
});

树的初始化、点击行样式修改

layui.use('tree', function () {
let tree = layui.tree,
$ = layui.$;
// 测试数据
const data = [{
title: '湖北' //一级菜单
, children: [{
title: '武汉' //二级菜单
, children: [{
title: '江汉区' //三级菜单
}, {
title: '洪山区' //三级菜单
}, {
title: '江岸区' //三级菜单
}, {
title: '汉阳区' //三级菜单
}]
}]
}, {
title: '浙江' //一级菜单
, children: [{
title: '杭州' //二级菜单
, children: [{
title: '西湖区' //三级菜单
}, {
title: '上城区' //三级菜单
}, {
title: '下城区' //三级菜单
}, {
title: '滨江区' //三级菜单
}]
}]
}, {
title: '陕西' //一级菜单
, children: [{
title: '西安' //二级菜单
}]
}];

//渲染
tree.render({
elem: '#test1' //绑定元素
, data: data
, onlyIconControl: true
, click: function (obj) {
layer.msg(obj.data.title);
}
});

// 树点击样式修改
$("body").on("click", ".layui-tree-txt", function () {
$(".layui-tree-entry").removeClass("current");
$(this).parent().parent().addClass("current");
});

});

点击修改样式其实只是加了个背景色，可按自己需要定义

转至：https://blog.csdn.net/zjh19961213/article/details/96427655

https://github.com/at-moon/layui-demo/blob/master/page/tree.html