


The following is a list of 13 functions commonly used by jQuery to operate tables:
1. The row changes color when the mouse moves
$(this).children('td').addClass('hover')
}, function(){
$( this).children('td').removeClass('hover')
});
Method 2:
$("#table1 tr:gt(0)").hover(function() {
$(this).children(" td").addClass("hover");
}, function() {
$(this).children("td").removeClass("hover");
});
2. Different colors for odd and even rows
$('#table1 tbody tr:even').css('background-color',' #ffc');
//Operation class
$("#table1 tbody tr:odd").addClass("odd");
$("#table1 tbody tr:even").addClass ("even");
3. Hide a line
$('#table1 tbody tr:eq(3)').hide();
$("#table1 tr td::nth-child(3) ").hide();
$("#table1 tr").each(function(){$("td:eq(3)",this).hide()});
4. Hide a column
5. Delete a row
$('#table1 tr:not(:first)') .remove();
//Delete the specified row
$('#table1 tr:eq(3)').remove();
6. Delete a column
$ ('#table1 tr th:not(:nth-child(1))').remove();
$('#table1 tr td:not(:nth-child(1))').remove( );
//Delete the first column
$('#table1 tr td::nth-child(1)').remove();
7. Get (set )The value of a certain cell
$('#table1 tr:eq(1) td:nth-child(1)').html('value');
// Get table1, the first td of the second tr value.
$('#table1 tr:eq(1) td:nth-child(1)').html();
8. Insert a row
$('
9. Get the value of the cell specified in each row
$('#table1 tr td:nth-child(1)').each (function (key, value) {
arr.push($(this).html());
});
var result = arr.join(',');
10. Select all or none
//Method zero:
$('#all').on('click', function () {
$('input.checkSub').prop('checked', this.checked); // Add effects to the currently bound sub-selections
});
//Method 1:
//Select all or not select all. The parameter passed in is event. For example: checkAll(event)
function checkAll(evt){
evt=evt?evt: window.event;
var chall=evt.target?evt.target:evt.srcElement;
var tbl=$("#table1");
var trlist=tbl.find("tr") ;
for(var i=1;i
var input=tr.find("INPUT[type=' checkbox']");
input.attr("checked",chall.checked);
}
}
//Method 2:
//Select all or none The parameter passed in is this, such as: checkAll(this)
function checkAll(evt){
var tbl=$("#table1");
var trlist=tbl.find("tr");
for(var i=1;i
var input=tr.find("INPUT[type='checkbox ']");
input.attr("checked",evt.checked);
}
}
//Method 3:
//Select all or none The input parameter is this. For example: checkAll(this)
function checkAll(evt){
$("#table1 tr").find("input[type='checkbox']").each(function( i){
$(this).attr("checked",evt.checked)
});
}
//Method 4:
//Select all or none The parameter passed in is this. For example: checkAll(this)
function checkAll(evt){
$("#table1 tr").find("input[type='checkbox']").attr( "checked",evt.checked);
}
11. The client dynamically adds rows
function btnAddRow(){
//The row number starts from 0, and the last row is the add, delete, save button, so subtract 2
var rownum=$( "#table1 tr").length-2;
var chk="";
var text="";
var sel="";
var row="
$(row).insertAfter($("#table1 tr:eq(" rownum ")") ;
The code is as follows:
Only one row can be deleted at a time. An error occurs when deleting multiple rows. function btnDeleteRow(){
$("#table1 tr").find(" input[type='checkbox']").each(function(i){ if($(this).attr("checked")){
Copy code
The code is as follows:
function btnSaveClick(){
//I don’t know how to set multiple filter conditions in the find() method, so I can’t get the value of the select list below
//$(" #table1 tr td").find("input[type='text']" || "select").each(function(i){
//alert($(this).val());
//}); ='text']").length>0){
alert($(this).find("input[type='text']").val()); (this).find("select").length>0)
{
alert($(this).find("select").val());
}
}) ;
}

实现方法:1、用“$("img").delay(毫秒数).fadeOut()”语句,delay()设置延迟秒数;2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句,通过定时器来延迟。

修改方法:1、用css()设置新样式,语法“$(元素).css("min-height","新值")”;2、用attr(),通过设置style属性来添加新样式,语法“$(元素).attr("style","min-height:新值")”。

区别:1、axios是一个异步请求框架,用于封装底层的XMLHttpRequest,而jquery是一个JavaScript库,只是顺便封装了dom操作;2、axios是基于承诺对象的,可以用承诺对象中的方法,而jquery不基于承诺对象。

增加元素的方法:1、用append(),语法“$("body").append(新元素)”,可向body内部的末尾处增加元素;2、用prepend(),语法“$("body").prepend(新元素)”,可向body内部的开始处增加元素。

在jquery中,apply()方法用于改变this指向,使用另一个对象替换当前对象,是应用某一对象的一个方法,语法为“apply(thisobj,[argarray])”;参数argarray表示的是以数组的形式进行传递。

删除方法:1、用empty(),语法“$("div").empty();”,可删除所有子节点和内容;2、用children()和remove(),语法“$("div").children().remove();”,只删除子元素,不删除内容。

去掉方法:1、用“$(selector).removeAttr("readonly")”语句删除readonly属性;2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。

on()方法有4个参数:1、第一个参数不可省略,规定要从被选元素添加的一个或多个事件或命名空间;2、第二个参数可省略,规定元素的事件处理程序;3、第三个参数可省略,规定传递到函数的额外数据;4、第四个参数可省略,规定当事件发生时运行的函数。


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