function createQp(){// 创建棋盘 var str = ''; for(var i = 0;i<row;i++){// 行数 str += '<ul class="row">' for(var j = 0;j<col;j++){// 列数 str+='<li class="col" data-x="'+i+'" data-y="'+j+'"></li>' } str += '</ul>' }解释代码
时间: 2024-03-29 13:42:11 浏览: 23
这段代码是用于创建一个棋盘的函数,其具体实现是通过字符串拼接生成相应的 HTML 代码。其中,变量 `row` 和 `col` 分别表示棋盘的行数和列数,通过两个嵌套的 for 循环分别遍历每一行和每一列,生成对应的 HTML 代码。具体来说,外层循环遍历每一行,内层循环遍历每一列,根据当前行和列的索引,使用字符串拼接生成一个 `<li>` 元素并将其添加到对应的 `<ul>` 中。由于这里的 `<li>` 元素是表示棋盘中的一个格子,因此需要为其添加一些额外的属性,例如 `data-x` 和 `data-y`,用于表示该格子的行号和列号。最终,函数返回一个字符串,表示生成的 HTML 代码。
相关问题
<script> // 1.创建表格 var row = parseInt($("#row-input").val()); // 获取行数 var col = parseInt($("#col-input").val()); // 获取列数 var table = $("<table></table>"); for (var i = 0; i < row; i++) { var tr = $("<tr></tr>"); for (var j = 0; j < col; j++) { var td = $("<td></td>"); tr.append(td); } table.append(tr); } $("#table-container").empty().append(table); // 清空并添加表格到容器中 // 2.设置表格首行为浅绿色 $("tr:first-child").css("background-color", "lightgreen"); // 3.设置偶数行为灰色 $("tr:even").css("background-color", "gray"); </script>补全html代码
以下是补全后的HTML代码:
```html
<!DOCTYPE html>
<html>
<head>
<title>表格练习</title>
<meta charset="utf-8">
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script>
$(function() {
$("#create-btn").click(function() {
// 1.创建表格
var row = parseInt($("#row-input").val()); // 获取行数
var col = parseInt($("#col-input").val()); // 获取列数
var table = $("<table></table>");
for (var i = 0; i < row; i++) {
var tr = $("<tr></tr>");
for (var j = 0; j < col; j++) {
var td = $("<td></td>");
tr.append(td);
}
table.append(tr);
}
$("#table-container").empty().append(table); // 清空并添加表格到容器中
// 2.设置表格首行为浅绿色
$("tr:first-child").css("background-color", "lightgreen");
// 3.设置偶数行为灰色
$("tr:even").css("background-color", "gray");
});
});
</script>
</head>
<body>
<h1>表格练习</h1>
<div>
<label>行数:</label>
<input type="number" id="row-input" value="3">
<label>列数:</label>
<input type="number" id="col-input" value="3">
<button id="create-btn">创建表格</button>
</div>
<div id="table-container"></div>
</body>
</html>
```
这个页面包括一个标题,一个表单用于输入行数和列数,一个按钮用于创建表格和一个用于显示表格的容器。当用户点击“创建表格”按钮时,页面将根据输入的行数和列数创建一个表格,并将其添加到容器中。同时,会将表格的首行设置为浅绿色,偶数行设置为灰色。
count: function() { var that = this; var list = this.rbars; var allcount = 0; //被选中个数 var len = list.length; //加入购物车个数 var totalmoney = 0; var discount = 0; for(var i = 0; i < len; i++) { if(list[i].ischecked) { var c = list[i].count; //个数 allcount += parseInt(c); var p = list[i].price; totalmoney += c * p;
This code snippet seems to be a JavaScript function called "count". It starts by creating a variable "that" which is a reference to the current object (presumably the object that this function is a method of). It then creates another variable "list" which is presumably an array of items that this function is meant to count.
The function proceeds to initialize a few more variables: "allcount" (which will keep track of the total number of selected items), "len" (which is the length of the "list" array), "totalmoney" (which will keep track of the total cost of all selected items), and "discount" (which is currently set to 0 but may be used to track any discounts later in the function).
The function then proceeds to loop through each item in the "list" array using a for loop. For each item, it checks if the "ischecked" property is true (presumably indicating that the item has been selected). If it is, the function adds the item's count and price to the "allcount" and "totalmoney" variables, respectively.
The function then ends without returning anything. It is possible that this function is meant to update some UI elements on the page (e.g. displaying the total number of selected items or the total cost), but without more context it is difficult to say for sure.
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