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I can't figure out why my JavaScript file won't display when linked

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问题 I can't figure out what's wrong here and I'm not getting any output from the Javascript file. I am trying to use src to be able to type my javascript file outside of the index file. This just prints the header from the html file "A test heading" without printing the text variable. If I type the code within the html file it works fine. Both scripts are in the same folder. <!DOCTYPE HTML> <html> <head> <h2> A Test Heading </h2> <script language = "JavaScript" src="/slider.js"></script> </head>

Javascript image src attribute returns wrong value

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问题 I have a little javascript code attached to a button with onclick to the following code: function ondelete () { var getDiv = document.getElementById("imgdiv"); var lb_img = $("#imgdiv").children(); for (var i = 0; i < lb_img.length; i++) { console.log(lb_img[i].src); } } This returns a single output which is great, this is the corresponding html when opened in chrome with F12 developers tool: <div id="imgdiv" class="modal-body next"> <img draggable="false"src="http://(urlfrommywebsite)/A_LANX

jQuery- dynamically alternate between image sources within an animated div

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问题 I have a menu that is animated to slide across the page when triggered by clicking on an image of an arrow. I'd like to switch the arrow to a different image source once the menu's animation has completed, and then return back to the original file when the menu has been closed. Best way to do this? Thank you! HTML: <div id="slider"> <div id="trigger_right"> <img class="arrow_small" src="images/left_small.png" alt="slide menu out" /> </div> <div class="trans" id="overlay"></div> <div id=

php正则表达式匹配img中任意属性的方法

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> `<?php / PHP正则提取图片img标记中的任意属性 / $str = '<center><img src="/uploads/images/20100516000.jpg" height="120" width="120"><br />PHP正则提取或更改图片img标记中的任意属性</center>'; //1、取整个图片代码 preg_match('/<\s img\s+[^>] ?src\s*=\s*('|")(. ?)\1[^>] ?/?\s*>/i',$str,$match); echo $match[0]; //2、取width preg_match('/<img.+(width="?\d*"?).+>/i',$str,$match); echo $match[1]; //3、取height preg_match('/<img.+(height="?\d*"?).+>/i',$str,$match); echo $match[1]; //4、取src preg_match('/<img.+src="?(.+.(jpg|gif|bmp|bnp|png))"?.+>/i',$str,$match); echo $match[1]; （PS：T不错的php Q扣峮：276167802，验证：csl）

setting variable value in src attribute of image tag to a base64 encoded image in javascript/ajax

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问题 I have an image byte code base64 encoded which i am trying to set the tag's src attribute in the javascript/ajax. I don't want to directly set it as i am getting this byte code from reading the response back from a servlet and taking the bytecode into a variable and want to set this variables value in the src attribute like following. var src3="data:image/jpg;base64,/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0aHBwgJC4nICIsIxwcKDcpLDAxNDQ0Hyc5PTgyPC4zNDL

Disable HTML 5 video from loading

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问题 I have a setup where there is a background video displaying depending on the current weather conditions, shown here: http://pitfarmtennis.co.uk/cms/. There are 6 different videos, currently the jQuery code to decide which to show just sets them to display:none, This sadly means all of them still load. This is the jQuery that is currently making a certain video play, in this case a sunny video: /*Day-sun*/ if((weather.code == "28")||(weather.code == "30")||(weather.code == "44")) { $('.home-bg

Responsive full width image banner with fixed height using srcset

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问题 I am trying to implement a responsive full width (fixed height) image banner with the srcset attribute. To support older browsers i am using picturefill as a polyfill. Basically i want a always 150px heigh full width banner, but with a different sized image depending von the screen width and the device pixel ratio . The Problem is that srcset does not pick for example the banner960x300 image if the device pixel ratio is 2. Here is what i have tried: <img srcset="/images/banner480x150.png 480w

get string between two strings using jquery

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问题 If I have this HTML <div class="comment-body"> [img]http://topnews.net.nz/images/YouTube-3.jpg[/img] random text here </div> <div class="comment-body"> [img]http://blog.brightcove.com/sites/all/uploads/FACEBOOK%20ICON.png[/img] random text here </div> how using jquery can I extract the value between [img] and [/img] and set it as a variable data-src2="" within an <img> element giving <div class="comment-body"> <img src="samesrc" class="commentimg" data-src2="http://topnews.net.nz/images

ROS创建功能包

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打开Home文件夹，在home文件夹下单击右键选择 Open in Terminal 在home目录下创建自己的工作空间，具体命令格式如下： mkdir <工作空间名称> 实例： mkdir ros_project_ws ,于是，home目录下多了一个文件夹。进入src文件夹， cd <文件夹名称> ，实例: cd ros_project_ws/ 。创建src文件夹, mkdir src ,并进入到该文件夹下。初始化创建的工作空间， catkin_init_worksapce 。具体过程请看运行截图：如果出现 Creating symlink "/home/<用户名>/ros_oriject_ws/CMakeLists.txt" pointing to "/opt/ros/melodic/share/catkin/cmake/toplevel.cmake" 字样，在src文件夹下查看是否有cmakelist.txt文件。说明初始化成功。退到总工作空间 ros_project_ws 下，执行下面代码 catkin_make 。会打印如下内容，并在创建出build和devel两个文件夹。创建install文件夹，用来存放要执行的文件。代码如下： catkin_make install ,会发现工作空间会多了一个install文件夹。进入src文件夹下，开始创建功能包

scatter_(input, dim, index, src)用法

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scatter_(input, dim, index, src)用法 0 表示按行填充 index中的位置对应x的位置取出用来填充的值，index的值的值对应input的要填充那个位置的行号，index的列号对应要填充input的列号例如index[0][2]----src[0][2]=0.4497 对应input[2][2] = 0.4497 同理得到按列填充一般用来进行onehot的处理吐槽网上说的实在看不懂来源： CSDN 作者： Moringstarluc 链接： https://blog.csdn.net/Moringstarluc/article/details/103654031