从嵌套的HTML列表中生成多维数组/对象

时间:2019-08-29 16:09:46

标签: javascript php jquery html

我想生成一个表示有序列表结构的数组。

列表可能类似于:

<ol class="list">
    <li><p>1</p>
        <ol>
            <li><p>1.1</p></li>
            <li><p>1.2</p></li>
            <li><p>1.3</p>
                <ol>
                    <li><p>1.3.1</p></li>
                </ol>
            </li>
            <li><p>1.4</p></li>
        </ol>
    </li>
    <li><p>2</p></li>
    <li><p>3</p></li>
</ol>

我使用以下Javascript / Jquery函数遍历此列表(基于此答案:https://stackoverflow.com/a/18084008/11995425

var count = 0;
var pages = [];
var parentStack = [];

var result = {};

parentStack.push(0);

function createNewLevel(obj) {
    var obj = obj || $('.list');

    if (obj.prop('tagName') == 'P') {
        ++count;

        pages.push({
            pId: parentStack[parentStack.length - 1],
            urlStr: obj.text(), myId: count
        });
    }

    if(obj.children().length > 0 ) {

        obj.find('> li').each(function(i){

            $(this).children().each(function(j){

                if($(this).prop('tagName') == 'OL') {
                    parentStack.push(count);
                }

                createNewLevel($(this));

                if($(this).prop('tagName') == 'OL') {
                    parentStack.pop();
                }
            });     
        })
    }
}
createNewLevel();

这将生成一个数组:

​0: Object { pId: 0, urlStr: "1", myId: 1 }
1: Object { pId: 1, urlStr: "1.1", myId: 2 }
2: Object { pId: 1, urlStr: "1.2", myId: 3 }
3: Object { pId: 1, urlStr: "1.3", myId: 4 }
4: Object { pId: 4, urlStr: "1.3.1", myId: 5 }
​5: Object { pId: 1, urlStr: "1.4", myId: 6 }
6: Object { pId: 0, urlStr: "2", myId: 7 }
7: Object { pId: 0, urlStr: "3", myId: 8 }

pId引用myId作为父级。

我无法将其转换为多数组。最后,我通过ajax将此数组(json.stringify)传递给PHP。最好在运行“ createNewLevel”时生成此数组。但是也可以稍后在PHP中对其进行转换。结果应如下所示:

array(5) {
  [0]=>
  array(2) {
    ["desc"]=>
    string(1) "1"
    ["children"]=>
    array(0) {
    }
  }
  [1]=>
  array(2) {
    ["desc"]=>
    string(1) "2"
    ["children"]=>
    array(4) {
      [0]=>
      array(2) {
        ["desc"]=>
        string(3) "2.1"
        ["children"]=>
        array(0) {
        }
      }
      [1]=>
      array(2) {
        ["desc"]=>
        string(3) "2.2"
        ["children"]=>
        array(0) {
        }
      }
      [2]=>
      array(2) {
        ["desc"]=>
        string(3) "2.3"
        ["children"]=>
        array(3) {
          [0]=>
          array(2) {
            ["desc"]=>
            string(5) "2.3.1"
            ["children"]=>
            array(0) {
            }
          }
          [1]=>
          array(2) {
            ["desc"]=>
            string(5) "2.3.2"
            ["children"]=>
            array(0) {
            }
          }
          [2]=>
          array(2) {
            ["desc"]=>
            string(5) "2.3.3"
            ["children"]=>
            array(0) {
            }
          }
        }
      }
      [3]=>
      array(2) {
        ["desc"]=>
        string(3) "2.4"
        ["children"]=>
        array(0) {
        }
      }
    }
  }
  [2]=>
  array(2) {
    ["desc"]=>
    string(1) "3"
    ["children"]=>
    array(0) {
    }
  }
  [3]=>
  array(2) {
    ["desc"]=>
    string(1) "4"
    ["children"]=>
    array(0) {
    }
  }
  [4]=>
  array(2) {
    ["desc"]=>
    string(1) "5"
    ["children"]=>
    array(0) {
    }
  }
}

1 个答案:

答案 0 :(得分:0)

您可以使用reduce方法和递归根据您的html生成嵌套结构。如果子元素具有ol,则可以调用generate函数,其中element参数将是该ol元素。

function generate(element, pid = 0) {
  return [...element.children].reduce((r, li) => {
    const p = li.querySelector('p');
    const ol = li.querySelector('ol');
    const obj = {pid};

    if (p) obj.text = p.textContent;
    if (ol) obj.children = generate(ol, pid + 1);

    r.push(obj);
    return r;
  }, [])
}

const result = generate(document.querySelector('.list'))
console.log(JSON.stringify(result, 0, 4))
<ol class="list">
    <li><p>1</p>
        <ol>
            <li><p>1.1</p></li>
            <li><p>1.2</p></li>
            <li><p>1.3</p>
                <ol>
                    <li><p>1.3.1</p></li>
                </ol>
            </li>
            <li><p>1.4</p></li>
        </ol>
    </li>
    <li><p>2</p></li>
    <li><p>3</p></li>
</ol>