option

I have a simple select tag <select> <option value="a">a</option> <option value="b">b</option> <option value="c">c</option> <option value="d">d</option> </select> I want add hover event on option $('select option').hover(function(){ console.log($(this).val()); },function(){ console.log("mouse out"); }); However, it only works in Firefox, not in Chrome. How can I solve this problem? Is it a bug in jquery? Is there some hack? hover event will not fire for option elements in Chrome and IE, might be in other browsers as well. You could try using some custom script for that: http://peterned.home

需求背景：dashboard作为目前企业中后台产品的“门面”，如何更加实时、高效、炫酷的对统计数据进行展示，是值得前端开发工程师和UI设计师共同思考的一个问题。今天就从0开始，封装一个动态渲染数据的Echarts折线图组件，抛砖引玉，一起来思考更多有意思的组件。 准备工作 项目结构搭建 因为生产需要（其实是懒），所以本教程使用了 ==vue-cli==进行了项目的基础结构搭建。 npm install -g vue-cli vue init webpack vue-charts cd vue-charts npm run dev 安装Echarts 直接使用npm进行安装。 npm install Echarts --save 引入Echarts //在main.js加入下面两行代码 import echarts from 'echarts' Vue.prototype.$echarts = echarts //将echarts注册成Vue的全局属性 前端全栈学习交流圈：866109386,面向1-3经验年前端开发人员,帮助突破技术瓶颈，提升思维能力,群内有大量PDF可供自取，更有干货实战项目视频进群免费领取。 到此，准备工作已经完成了。 静态组件开发 因为被《React编程思想》这篇文章毒害太深，所以笔者开发组件也习惯从基础到高级逐步迭代。 静态组件要实现的目的很简单

I have spent the last five hours trying to get every product option combination from a table but I'm totally stuck now. I have a table with data like (simplified): CREATE TABLE `assigned_options` ( `option_id` int(10) unsigned NOT NULL DEFAULT '0', `value_id` int(10) unsigned NOT NULL DEFAULT '0', ); INSERT INTO `assigned_options` (`value_id`, `option_id`) VALUES (4, 2), (3, 2), (2, 1), (1, 1), (5, 3), (6, 3), (7, 3); Say option ID 2 is color with variations red (4) and blue (3), option id 1 size etc.... Is it possible to do this with one MySQL query? I have tried using PHP to make a recurring

使用语法 1. $("#select_id").append("<option value='Value'>Text</option>"); //为Select追加一个Option(下拉项) 2. $("#select_id").prepend("<option value='0'>请选择</option>"); //为Select插入一个Option(第一个位置) 3. $("#select_id option:last").remove(); //删除Select中索引值最大Option(最后一个) 4. $("#select_id option[index='0']").remove(); //删除Select中索引值为0的Option(第一个) 5. $("#select_id option[value='3']").remove(); //删除Select中Value='3'的Option 来源： https://www.cnblogs.com/XuanZP/p/11672529.html

I'm trying to bring up an alert dialog box when one of my OptionsMenuItems is clicked. Proceed with operation if user clicks "yes", cancels if clicks no. I just don't know how to do the code. This is what I have: @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.exit: this.finish(); return true; case R.id.about: Intent i = new Intent(this, AboutActivity.class); this.startActivity(i); case R.id.skip: AlertDialog.Builder alertbox = new AlertDialog.Builder(this); // set the message to display alertbox.setMessage("The yoga pose will be skipped

环境：OS X EI Capitan 10.11 & lnmp & python 2.7 背景： 　　　python脚本模拟登陆 现象： 　　　手动登陆，弹出滑块验证，手动拉动滑块也会报错，如下图： 　　　　 　　　　 　　 解决： 1 from selenium import webdriver 2 option = webdriver.ChromeOptions() 3 option.add_experimental_option('excludeSwitches', ['enable-automation']) 4 browser = webdriver.Chrome(options=option) 5 driver = browser.get('https://xxxx.xxxx.com/member/login.jhtml?spm=url') 原理请参考： 　　诸多资料查询，这个是最清晰易懂，也是正确的 　　　　 一行js代码识别Selenium+Webdriver及其应对方案 来源： https://www.cnblogs.com/estadewey/p/11667715.html

I have a program where you enter an option -d and then whether or not you supply a non-optional argument after the option, do something. Heres my code: #include <stdio.h> #include <getopt.h> #include <stdlib.h> #define OPT_LIST "d::" int main (int argc, char *argv[]) { int c; char string[] = "blah"; while ((c = getopt (argc, argv, OPT_LIST)) != -1) { switch (c) { case 'd': printf("%s\n", optarg); break; case '?': fprintf(stderr, "invalid option\n"); exit(EXIT_FAILURE); } } } So if you enter a non-optional argument after the option, it prints the argument. But I want it to print out the char

I am trying to see if an option was selected in a selectbox and if not, I want it to alert a string. I was referring to this link( Check if option is selected with jQuery, if not select a default ), but its not working. Here's my code: <select id="language" name="language"> <option value=""></option> <option value="1">One</option> <option value="2">Two</option> <option value="3">Three</option> </select> if(!$("#language option:selected").length) { alert('no option is selected'); } I pretty much copied the linked answer, but it's still not working. What am I missing? Another way to go is: if($(