如何在javaScript中实现分层多级数据表? [英] How to implement hierarchical multilevel datatable in javaScript?
问题描述
我在不使用任何插件或库的情况下实现多级数据表.我想基于javaScript、JQuery或者angular js来实现.我检查了以下链接之一,
<块引用>你的回答对我很有价值.提前致谢.
我能想到的使用 vanilla Javascript 完成此任务的最简单方法是修改对象的深度优先遍历:
function renderJSON(json) {const wrapper = document.createElement('div');常量栈 = [{节点:json,名称:'根',parentEl:包装器}];while (stack.length > 0) {让当前 = stack.pop();让 currentObj = current.node;让 currentParentEl = current.parentEl;let level = document.createElement('div');level.classList.add('level');level.textContent = current.name + ':';如果(currentObj.renderContent){//渲染自定义 html 内容currentObj.renderContent(level);} else if (!(currentObj instanceof Object)) {level.textContent += currentObj;}currentParentEl.append(level);if (currentObj instanceof Object) {让键 = Object.keys(currentObj);如果(!currentObj.skipChildren){//反向推送以保留密钥顺序for (let i = keys.length - 1; i >= 0; i--) {让键 = 键 [i];让节点 = currentObj[key];堆栈推({节点:节点,名称:钥匙,parentEl:级别});}}}}返回包装器;}//示例用例:const 权限 = 函数权限(){this.skipChildren = true;this.view = false;this.edit = false;this.delete = false;};Permissions.prototype = {渲染内容(el){const 字段 = ['查看', '编辑', '删除'];for(让字段字段){const label = document.createElement('label');label.textContent = 字段;const checkbox = document.createElement('input');checkbox.type = 'checkbox';checkbox.checked = this[field];label.appendChild(checkbox);el.appendChild(标签);}}};const 渲染 = renderJSON({元素 1:{一:4,乙:6,c: 24,元素1a:{一个:'你好'}},元素 2:{一个:'abc',权限:新权限()},元素3:[第一",第二",第三"]});document.body.append(rendered);
.level {左边距:1em;}
根据您的需要,您可以通过多种不同的方式从这段代码中分离出来.由于您首先获得了一个 JSON 字符串,因此您需要找到某种方法将其转换为 Javascript 对象,从而产生您想要的结果.
I am implementing multi level datatable without using any plugin or library. I want to implement based on javaScript, JQuery or angular js. I checked one below links,
Traverse all the Nodes of a JSON Object Tree with JavaScript
But my json structure is different from above link.
I need to display my JSON in Tree Structure UI. I don't hard code level in html. All level should be handle by javascript.
I have implemented jsfiddle: http://jsfiddle.net/varunPes/0n9fmawb/40/
JSON STRUCTURE
[ {
Home:{
"checkbox_view":true,
"checkbox_edit":false,
"checkbox_delete":true
}
},
{
"watchColorWorld":{
"local":{
"app-local-black":{
"checkbox_view":true,
"checkbox_edit":true,
"checkbox_delete":true
}
},
"global":{
"app-global-red":{
"checkbox_view":true,
"checkbox_edit":true,
"checkbox_delete":true
}
},
"world":{
"app-world-green":{
"checkbox_view":true,
"checkbox_edit":true,
"checkbox_delete":true
}
}
}
},
{
"systemMgmt":{
"checkbox_view":true,
"checkbox_edit":true,
"checkbox_delete":true
}
},
{
"rules":{
"Rule1":{
"rule2":{
"rule3":{
"checkbox_view":true,
"checkbox_edit":true,
"checkbox_delete":true
}
}
}
}
}
]
Expacted Output
You answer valuable for me. Thanks in advance.
The simplest way I can think of accomplishing this with vanilla Javascript would be a modified depth first traversal of an object:
function renderJSON(json) {
const wrapper = document.createElement('div');
const stack = [{
node: json,
name: 'root',
parentEl: wrapper
}];
while (stack.length > 0) {
let current = stack.pop();
let currentObj = current.node;
let currentParentEl = current.parentEl;
let level = document.createElement('div');
level.classList.add('level');
level.textContent = current.name + ': ';
if (currentObj.renderContent) {
// render custom html content
currentObj.renderContent(level);
} else if (!(currentObj instanceof Object)) {
level.textContent += currentObj;
}
currentParentEl.append(level);
if (currentObj instanceof Object) {
let keys = Object.keys(currentObj);
if (!currentObj.skipChildren) {
// push in reverse to preserve key order
for (let i = keys.length - 1; i >= 0; i--) {
let key = keys[i];
let node = currentObj[key];
stack.push({
node: node,
name: key,
parentEl: level
});
}
}
}
}
return wrapper;
}
// Example Use Case:
const Permissions = function Permissions() {
this.skipChildren = true;
this.view = false;
this.edit = false;
this.delete = false;
};
Permissions.prototype = {
renderContent(el) {
const fields = ['view', 'edit', 'delete'];
for (let field of fields) {
const label = document.createElement('label');
label.textContent = field;
const checkbox = document.createElement('input');
checkbox.type = 'checkbox';
checkbox.checked = this[field];
label.appendChild(checkbox);
el.appendChild(label);
}
}
};
const rendered = renderJSON({
element1: {
a: 4,
b: 6,
c: 24,
element1a: {
a: 'hello'
}
},
element2: {
a: 'abc',
permissions: new Permissions()
},
element3: ["first", "second", "third"]
});
document.body.append(rendered);
.level {
margin-left: 1em;
}
There's a lot of different ways you could branch off of this code depending on your needs. Since you're given a JSON string to begin with, you'll need to find some way to convert that into a Javascript object that will produce the result you want.
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