Tag: JavaScript

在HTML5canvas上绘制旋转的文字: 我正在开发的Web应用程序的一部分，需要我创build条形图来显示各种信息。我想，如果用户的浏览器是有能力的，我会使用HTML5canvas元素来绘制它们。我没有问题为我的graphics绘制线条，但是在标记轴线，条形或线条时遇到了一个障碍。如何将旋转的文字绘制到canvas元素上，以便它与所标记的项目alignment？几个例子包括：将文本逆时针旋转90度以标记y轴将文本逆时针旋转90度以在垂直条形图上标记条形将文本旋转任意大小以标记折线图上的线条任何指针将不胜感激。

JavaScript – 获取浏览器高度: 我正在寻找一个代码片段来获取浏览器窗口内的可视区域的高度。我有这个代码，但是它有一些bug，就好像身体没有超过窗口的高度，然后又回来了。 document.body.clientHeight; 我已经尝试过其他一些东西，但是要么返回NaN，要么与上面的高度相同。有谁知道如何获得浏览窗口的真正高度？

Datatables实时resize: 我正在使用奇妙的DataTables jQuery插件; http://datatables.net/添加了FixedColumns和KeyTable的额外function。现在，当窗口大小改变时，表格会进行大小调整。然而，表格的包含div也可以通过jQueryanimation宽度来resize，而且我还没有find调整表格大小的方法 – 它只是停留在原始宽度上。只有在pageload之前更改代码中的div宽度，表格才能正确resize。我怎样才能使DataTable根据窗口宽度和包含的div宽度dynamicresize？提前致谢！ 🙂

Underscore.js – 将键/值对的数组映射到对象 – 一个class轮: 我一直在经历下划线文档，但我似乎无法find一个方法（或嵌套的方法调用）做下列转换：比方说，我有以下的JavaScript数组： [{ "name" : "sEcho", "value" : 1},{ "name" : "iColumns", "value" : 12}, … ] 我需要将其转换为以下对象： { sEcho: 1, iColumns: 12, … } 我使用underscore.js的原因，所以它必须是一个class轮。

在Javascript生成的表的顶部添加一行: 我在表格结构中做了一个错误的计算。下面的代码是一个乐透游戏（我认为是一段已知的代码）有没有办法在充满数字的表顶部添加一行？我真的不知道该怎么做。 http://www.coldcharlie.nl/lotto/ <script type="text/javascript"> (function() { var players = { Joop : ["6","8","16","18","26","28","32","36","38","41"], Marijke: ["7","10","14","18","24","29","30","34","39","40"], Michel : ["4","5","11","16","21","27","33","36","42","44"], Mario : ["6","9","18","25","32","35","39","40","43","45"], Diana : ["2","6","8","17","22","23","33","36","42","45"], Agnes : ["3","5","10","15","26","29","32","37","41","44"], Chris : ["5","7","8","9","11","12","16","28","30","32"], Jeannette: ["1","2","4","7","8","11","13","28","30","38"], Wieger: ["1","2","3","7","10","13","14","22","23","27"], Anita: ["6","13","15","17","21","26","32","33","43","45"], Thea: ["1","3","5","7","10","17","19","20","22","38"], Danny: ["3","7","11","15","22","28","32","37","40","43"], Cindy: ["2","4","16","18","21","24","33","38","41","44"], Hanneke: ["1","3","4","12","18","21","25","30","36","40"], Willem: ["3","9","17","21","27","33","35","39","41","42"] }, draws = [ { when: […]

通过javascript删除html元素样式: 我试图replace元素的内联样式标记值。当前元素如下所示： `<tr class="row-even" style="background: red none repeat scroll 0% 0%; position: relative; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" id="0000ph2009-06-10s1s02">` 我想删除所有的风格的东西，所以它的风格，而不是它的内联风格。我试过删除element.style; 和element.style = null; 和element.style =“”; 无济于事。我目前的代码在这些声明中断了。整个function如下所示：函数unSetHighlight（index）{ if(index < 10) index = "000" + (index); else if (index < 100) index = "000" + (index); else if(index < 1000) index = […]

使用JQuery获取触发事件的元素的类: 无论如何，点击事件被触发时，得到类。我的代码如下，它只适用于id而不是类。 HTML： <html> <body> <a href="#" id="kana1" class="konbo">click me 1</a> <a href="#" id="kana2" class="kinta">click me 2</a> </body> </html> JQuery的： $(document).ready(function() { $("a").click(function(event) { alert(event.target.id+" and "+event.target.class); }); }); jsfiddle代码在这里

插件在WordPress 4.5更新后引发TypeError: 我正在debugging一个可视化的composer php插件，当我更新Wordpress到4.5后，我无法弄清楚它为什么会抛出一个TypeError。控制台中的错误消息： JQMIGRATE: Migrate is installed, version 1.4.0 load-scripts.php?…. Uncaught TypeError: $template.get is not a function composer-view.js?ver=4.1.1.1:73 在下面的代码中只能find$template 。我明白，这不是很多情况下，但我怎样才能解决这个错误？ /** * Convert html into correct element * @param html */ html2element: function(html) { var attributes = {}, $template; if (_.isString(html)) { this.template = _.template(html); $template = $(this.template(this.model.toJSON()).trim()); } else { this.template = html; […]

在大写字母之前插入空格: 我有一个string"MySites" 。我想在“ My和“ Sites之间放置一个空格。我怎样才能做到这一点在jQuery或JavaScript？

获取无法通过引导轮播脚本读取未定义的属性'offsetWidth': 我使用Bootstrap 3.3创build了一个carousel ，它可以在我的本地机器上运行，但是当我将上面的bootstrap js文件与其他文件一起编译到一个文件的服务器上时，出现这个错误： Cannot read property 'offsetWidth' of undefined – 有没有人遇到过这个问题，并有任何已知的解决scheme？