{"id":29075,"date":"2021-06-03T16:59:00","date_gmt":"2021-06-03T13:59:00","guid":{"rendered":"https:\/\/themewp.inform.click\/?p=29075"},"modified":"2021-10-17T04:27:37","modified_gmt":"2021-10-17T01:27:37","slug":"flera-kryssrutor-markera-avmarkera-med-jquery","status":"publish","type":"post","link":"https:\/\/themewp.inform.click\/sv\/flera-kryssrutor-markera-avmarkera-med-jquery\/","title":{"rendered":"Flera kryssrutor Markera Avmarkera med jQuery"},"content":{"rendered":"

N\u00e4r vi utvecklar webbapplikationer beh\u00f6ver vi vanligtvis utf\u00f6ra CRUD-operationer. F\u00f6r listvyn brukade vi ha en tabell med flera rader. I varje rad beh\u00e5ller vi en kryssruta f\u00f6r att markera \/ avmarkera en specifik rad. Dessa kryssrutor anv\u00e4nds n\u00e4r anv\u00e4ndaren vill radera en rad fr\u00e5n databasen. Det kan ocks\u00e5 ha massraderingsfunktionalitet d\u00e4r den \u00f6verordnade kryssrutan som anv\u00e4nds f\u00f6r att markera \/ avmarkera barnets kryssrutor.<\/p>\n

I den h\u00e4r artikeln studerar vi hur du utf\u00f6r markera \/ avmarkera flera kryssrutor med jQuery.<\/p>\n

V\u00e5r slutliga vy \u00e4r som visas p\u00e5 sk\u00e4rmdumpen nedan. Den visar den \u00f6verordnade kryssrutan i rubrikraden och varje rad har sin egen kryssruta.<\/p>\n<\/p>\n

Om du markerar kryssrutan f\u00f6r f\u00f6r\u00e4ldern markeras alla kryssrutor f\u00f6r barn. Och n\u00e4r vi avmarkerar kryssrutan f\u00f6r f\u00f6r\u00e4ldrar, b\u00f6r barnets kryssrutor avmarkeras. Med detta sagt, l\u00e5t oss se hur du anv\u00e4nder flera kryssrutor markera \/ avmarkera med jQuery.<\/p>\n

Skapa provtabell i Bootstrap<\/h3>\n

F\u00f6r att komma ig\u00e5ng beh\u00f6ver vi en tabell med n\u00e5gra poster tillsammans med kryssrutorna. I koden nedan skapar jag dummy-tabell med Bootstrap<\/a>. Jag har ocks\u00e5 lagt till dummy-poster i tabellen.<\/p>\n

<link rel=\"stylesheet\" href=\"https:\/\/stackpath.bootstrapcdn.com\/bootstrap\/4.5.2\/css\/bootstrap.min.css\" \/>\n<div class=\"container\">\n\u00a0\u00a0\u00a0\u00a0<div class=\"row\">\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<div class=\"col-xs-12 col-md-8\">\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<table class=\"table\">\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<thead>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<th><input type=\"checkbox\" id=\"selectall\"\/><\/th>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<th>First Name<\/th>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<th>Last Name<\/th>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<th>Username<\/th>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/thead>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<tbody>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td><input type=\"checkbox\" class=\"singlechkbox\" name=\"username\" value=\"1\"\/><\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>Mark<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>Otto<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>@mdo<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td><input type=\"checkbox\" class=\"singlechkbox\" name=\"username\" value=\"2\"\/><\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>Jacob<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>Thornton<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>@fat<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td><input type=\"checkbox\" class=\"singlechkbox\" name=\"username\" value=\"3\"\/><\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>Larry<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>the Bird<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<td>@twitter<\/td>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/tr>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/tbody>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/table>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/div>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<div class=\"col-xs-6 col-md-4\"><\/div>\n\u00a0\u00a0\u00a0\u00a0<\/div>\n<\/div>\n<script src=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/jquery\/3.5.1\/jquery.min.js\"><\/script><\/code><\/pre>\n
Om du k\u00f6r ovanst\u00e5ende HTML-fil i webbl\u00e4saren ser du en tabell som inneh\u00e5ller fyra rader. Den f\u00f6rsta raden \u00e4r f\u00f6r rubrik\u00e4ndam\u00e5l och den f\u00f6rsta kolumnen \u00e4r f\u00f6r kryssrutorna. Nu ska vi skriva jQuery-kod som g\u00f6r verklig magi i kryssrutorna.<\/p>\n
jQuery-kod som markerar \/ avmarkerar flera kryssrutor<\/h3>\n
jQuery tillhandah\u00e5ller metoder och h\u00e4ndelser som vi kan n\u00e5 v\u00e5rt m\u00e5l. H\u00e4r kommer jag att anv\u00e4nda click<\/code>h\u00e4ndelse och prop<\/code>metod f\u00f6r att utf\u00f6ra v\u00e5r uppgift.<\/p>\n
<script type=\"text\/javascript\">\njQuery(function($) {\n\u00a0\u00a0\u00a0\u00a0$('body').on('click', '#selectall', function() {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$('.singlechkbox').prop('checked', this.checked);\n\u00a0\u00a0\u00a0\u00a0});\n\u00a0\n\u00a0\u00a0\u00a0\u00a0$('body').on('click', '.singlechkbox', function() {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if($('.singlechkbox').length == $('.singlechkbox:checked').length) {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$('#selectall').prop('checked', true);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} else {\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0$(\"#selectall\").prop('checked', false);\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\n\u00a0\n\u00a0\u00a0\u00a0\u00a0});\n});\n<\/script><\/code><\/pre>\n
Ovanst\u00e5ende kod kontrollerar om den \u00f6verordnade kryssrutan \u00e4r markerad. Om det \u00e4r s\u00e5 markerar det alla kryssrutor. N\u00e4r du avmarkerar kryssrutan f\u00f6r f\u00f6r\u00e4ldern, avmarkeras den ocks\u00e5 f\u00f6r alla underordnade kryssrutor.<\/p>\n
Jag hoppas att du f\u00f6rst\u00e5r hur du markerar \/ avmarkerar kryssrutor med jQuery. Jag skulle vilja h\u00f6ra dina tankar i kommentarf\u00e4ltet nedan.<\/p>\n
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