使用JS从html表中的第一列搜索值？

Question

我有这张桌子

<th>Example No.</th>
<th>Column 1</th>
<tr>
<td id="SampleId">3512376894</td>
<td>two.test2@hotmail.com</td>
</tr>

我有按所有列搜索值的脚本。但我要做的就是仅使用 td id 按第一列搜索值。但我不知道该怎么做。请好心，帮我做吗？谢谢！

Here's the jsfiddle file

这是 JScript：

function doSearch() {
        var searchText = document.getElementById('searchTerm').value;
        var targetTable = document.getElementById('dataTable');
        var targetTableColCount;
        for (var rowIndex = 0; rowIndex < targetTable.rows.length; rowIndex++) {
            var rowData = '';
            if (rowIndex == 0) {
                targetTableColCount = targetTable.rows.item(rowIndex).cells.length;
                continue; //do not execute further code for header row.
            }
            for (var colIndex = 0; colIndex < targetTableColCount; colIndex++) {
                rowData += targetTable.rows.item(rowIndex).cells.item(colIndex).textContent;
                if (rowIndex <= 1) {
                    document.getElementById('noresults').style.display = "block";
                }
            }
        }
    }

Answer 1

使用下面的 sn-p 在给定列中搜索某个术语。

<!-- HTML -->
<table id="dataTable">
  <th>Example No.</th>
  <th>Column 1</th>
  <th>Column  2</th>
  <tr>
    <td>345678917</td>
    <td>Test 1</td>
    <td>one_test1@gmail.com</td>
  </tr>
  <tr>
    <td>3512376894</td>
    <td>Test 2</td>
    <td>two.test2@hotmail.com</td>
  </tr>  
</table>

// JavaScript
window.onload = function(){
  var term = "3512376894";                   // term you're searching for
  var column = 0;                            // which column to search
  var pattern = new RegExp(term, 'g');       // make search more flexible 
  var table = document.getElementById('dataTable');
  var tr = table.getElementsByTagName('TR');
  for(var i = 0; i < tr.length; i++){
    var td = tr[i].getElementsByTagName('TD');
    for(var j = 0; j < td.length; j++){
      if(j == column && td[j].innerHTML == term){

      // for more flexibility use match() function and the pattern built above
      // if(j == column && td[j].innerHTML.match(pattern)){

        console.log('Found it: ' + td[j].innerHTML);
      }
    }    
  }
};

输出：

Found it: 3512376894

Working jsBin 或jsFiddle 或此版本jsFiddle

Verions 4 | Verions 5 | Verions 6

Answer 2

听起来你的问题是遍历 DOM。以下是如何遍历表行：

var trs = document.getElementsByTagName('tr');

for(i = 0; i < trs.length; i++){
    //trs[i] is the current table row, .children[0] selects the first child
    console.log(trs[i].children[0]);
}

然后您可以使用正则表达式或indexOf 检查innerHtml 中的搜索词。

Answer 3

很确定这是你想要做的：

function findRows(table, column, searchText) {
    var rows = table.rows,
        r = 0,
        found = false,
        anyFound = false;

    for (; r < rows.length; r += 1) {
        row = rows.item(r);
        found = (row.cells.item(column).textContent.indexOf(searchText) !== -1);
        anyFound = anyFound || found;

        row.style.display = found ? "table-row" : "none";
    }

    document.getElementById('noresults').style.display = anyFound ? "none" : "block";
}

function performSearch() {
    var searchText = document.getElementById('searchTerm').value,
        targetTable = document.getElementById('dataTable');

    findRows(targetTable, 0, searchText);
}

document.getElementById("searchTerm").onkeyup = performSearch;

working jsFiddle

Answer 4

function processTable(tableId, searchTerm, colNumber, hideCallback, showCallBack) {

    var mySearchTerm = searchTerm || "",
        myTable = document.getElementById(tableId) || document.createElement("TABLE"),
        myRowsArray = getElements(null, "TR", myTable), //convert to array
        myRowsArrayLength = myRowsArray.length;

    var index = 0;
    for (var i = myRowsArrayLength; --i;) {
        var myTempRowElement = myRowsArray[i],
            myTempColArray = getElements(null, "TD", myTempRowElement),
            myTempCol = (myTempColArray.length > 0 ? myTempColArray[colNumber - 1] : document.createElement("TD")),
            myText = getText(myTempCol);
        if (myText === mySearchTerm) {
            showCallBack(myTempRowElement);
        }
        else {
            hideCallback(myTempRowElement);
        }
    }
};

function init() {

    var myHandler = function (e) {
        var myTermEl = document.getElementById("searchTerm"),
            myTextContent = getText(myTermEl) || myTermEl.value || "";

        processTable("dataTable", myTextContent, 1,
            function hideCallback(el) {
                el.style.display = 'none';
            },
            function showCallBack(el) {
                el.style.display = 'table-row';
            }
        );
    };

    myHandler();

    document.getElementById("searchTerm").onkeyup = myHandler;
    document.getElementById("searchTerm").onchange = myHandler;
    document.getElementById("searchTerm").onclick = myHandler;
};

(function () {
    if (this.addEventListener) {
        this.addEventListener("load", init, false)
    }
    else {
        window.onload = init;
    }
}());
var isClassMember = function (element, classname) {
    var classes = element.className;
    if (!classes) {
        return false;
    };
    if (classes == classname) {
        return true;
    };
    var whitespace = /\s+/;
    if (!whitespace.test(classes)) {
        return false;
    };
    var c = classes.split(whitespace);
    for (var i = 0; i < c.length; i++) {
        if (c[i] == classname) {
            return true;
        };
    };
    return false;
};
var getElements = function (classname, tagname, root, firstFlag, depth) {
    if (!root) {
        root = document;
    }
    else {
        if (typeof root == "string") {
            root = document.getElementById(root);
        };
    };
    if (!tagname) {
        tagname = "*";
    };
    if (depth) {
        var maxRecursion = depth;
        var all = (function getChildsElementsLevel(root, tagName, currentLevelNumber) {
            var result = [],
                currentLevelChilds = (function getLevelChilds(root, tagName) {
                    var result = [];
                    var children = root.firstChild;
                    do {
                        if (children.nodeName == tagName) {
                            result.push(children);
                        };
                    } while (children = children.nextSibling);
                    return result;
                })(root, tagName),
                currentLevelChildsLength = currentLevelChilds.length,
                nextLevelNumber = ++currentLevelNumber;

            for (var f = currentLevelChildsLength; f--;) {

                var currentEl = currentLevelChilds[f];
                result.push(currentEl);
                if (nextLevelNumber < maxRecursion) {
                    result.concat(getChildsElementsLevel(currentEl, tagName, nextLevelNumber));
                }
            }
            return result;
        })(root, tagname, 0);
    }
    else {
        var all = root.getElementsByTagName(tagname);
    }
    if (!classname) {
        return all;
    };
    var elements = [],
        allLength = all.length,
        isMyClass = isClassMember;
    if (firstFlag) {
        for (var i = 0; i < allLength; i++) {

            var element = all[i];
            if (isMyClass(element, classname)) {
                return element;
            };
        };
    }
    else {
        for (var i = allLength; i--;) {

            var element = all[i];
            if (isMyClass(element, classname)) {
                elements.push(element);
            };
        };
    }

    return elements;
};
var getText = function (n) {
    function getStrings(n, strings) {

        if (n.nodeType == 3 /* Node.TEXT_NODE */) {
            strings.push(n.data);
        }
        else {
            if (n.nodeType == 1 /* Node.ELEMENT_NODE */) {
                for (var m = n.firstChild; m != null; m = m.nextSibling) {
                    getStrings(m, strings);
                };
            };
        };
    };
    var strings = [];
    getStrings(n, strings);
    return strings.join("");
};