Can someone tell me what is the main difference between a JavaScript object defined by using "Object Literal Notation" and JSON object? According to a JavaScript book it says this is an object defined by using Object Notation: var anObject = { property1 : true, showMessage : function (msg) { alert(msg) } }; Why isn't it a JSON object in this case? Just because it is not
有人能告诉我通过使用“Object Literal Notation”定义的JavaScript对象和JSON对象之间的主要区别是什么？ 根据一本JavaScript书，它说这是一个使用Object Notation定义的对象： var anObject = { property1 : true, showMessage : function (msg) { alert(msg) } }; 为什么不是这种情况下的JSON对象？ 仅仅因为它没有用引号定义？ 让我们首先澄清JSON实际是什么。 JSON是一种独立于语言的文本数据交换格式，非常
This question already has an answer here: Can comments be used in JSON? 42 answers NO, comments are not part of the JSON RFC 7159, however there are JSON parsers which support C++-Style comments { "img":{ "width": 320, "height": 240 } //Picture details } See JSON++ So the answer depends on what you are going to do with your JSON. The JavaScript-JSON parser ( JSON.parse() ) doesn't
这个问题在这里已经有了答案： 可以在JSON中使用评论吗？ 42个答案 不，注释不是JSON RFC 7159的一部分，但是有JSON解析器支持C ++ - 样式注释 { "img":{ "width": 320, "height": 240 } //Picture details } 请参阅JSON ++ 所以答案取决于你将如何处理你的JSON。 JavaScript-JSON解析器（ JSON.parse() ）不支持这一点。
I am trying to write a JavaScript script to add to greasemonkey that adds a button after an element. The onClick for this button should copy the parents element text to the keyboard. I have seen plenty of examples that copy already selected text to the clipboard such as this: <SCRIPT LANGUAGE="JavaScript"> <!-- Begin function copyit(theField) { var selectedText = docum
我正在尝试编写一个JavaScript脚本以添加到在元素后添加按钮的greasemonkey。 该按钮的onClick应该将父母元素文本复制到键盘。 我已经看到了很多将已选文本复制到剪贴板的示例，如下所示： <SCRIPT LANGUAGE="JavaScript"> <!-- Begin function copyit(theField) { var selectedText = document.selection; if (selectedText.type == 'Text') { var newRange = selectedText.createRange();
Is there a way in javascript to copy an html string (ie <b>xx<b> ) into the clipboard as text/html, so that it can then be pasted into for example a gmail message with the formatting (ie, xx in bold) There exists solutions to copy to the clipboard as text (text/plain) for example https://stackoverflow.com/a/30810322/460084 but not as text/html I need a non flash, non jquery soluti
有没有一种方法在javascript中将html字符串（即<b>xx<b> ）复制到剪贴板中作为text / html，以便它可以粘贴到例如具有格式的gmail消息中（例如，xx in胆大） 有一些解决方案可以以文本（文本/纯文本）的形式复制到剪贴板，例如https://stackoverflow.com/a/30810322/460084而不是text / html 我需要一个非Flash，非jQuery的解决方案，至少可以在IE11 FF42和Chrome上运行。 理想情况下，我想在剪贴板中存储字符
When you hover over a card in Trello and press Ctrl+C, the URL of this card is copied to the clipboard. How do they do this? As far as I can tell, there is no Flash movie involved. I've got Flashblock installed, and the Firefox network tab shows no Flash movie loaded. (That's the usual method, for example, by ZeroClipboard.) How do they achieve this magic? (Right at this moment I
当您将鼠标悬停在Trello的卡片上并按Ctrl + C时，此卡片的URL将被复制到剪贴板。 他们如何做到这一点？ 据我所知，没有涉及Flash电影。 我已安装Flashblock，并且Firefox网络选项卡未显示加载的Flash影片。 （这是通常的方法，例如，ZeroClipboard。） 他们如何实现这种魔力？ （在这一刻，我想我有一个顿悟：你不能选择页面上的文本，所以我认为他们有一个不可见的元素，他们通过JavaScript代码创建文本选择，Ctrl + C
This question already has an answer here: Sending multipart/formdata with jQuery.ajax 11 answers I believe you could do it like this : var fd = new FormData(); fd.append( 'file', input.files[0] ); $.ajax({ url: 'http://example.com/script.php', data: fd, processData: false, contentType: false, type: 'POST', success: function(data){ alert(data); } }); Setting processDat
这个问题在这里已经有了答案： 用jQuery.ajax发送multipart / formdata 11个答案 我相信你可以这样做： var fd = new FormData(); fd.append( 'file', input.files[0] ); $.ajax({ url: 'http://example.com/script.php', data: fd, processData: false, contentType: false, type: 'POST', success: function(data){ alert(data); } }); 将processData设置为false可以防止jQuery自动将数据转换为
I have been trying to get an ajax call to work inside a function triggered by an onclick event. When I use event.preventDefault the page is not reloaded but the ajax call does not work, no data is added to my database. When I comment out that line the page is reloaded but everything else works. function clickFunction(elem) { var var1 = elem.id; var var2 = var1.split("_"); // ele
我一直试图让ajax调用在由onclick事件触发的函数内部工作。 当我使用event.preventDefault页面不会重新加载，但ajax调用不起作用，没有数据被添加到我的数据库。 当我注释掉该行时，该页面将被重新加载，但其他所有功能都可以使用。 function clickFunction(elem) { var var1 = elem.id; var var2 = var1.split("_"); // elem.preventDefault(); if (var2[0] == "Add") { if (var2[1] == "Calls"
I'm debuging my library in someone elses code: Part of it it's vanilla JS and my library is wirtten in jQuery. It have tabs tabber.js (code from 2006) and it have tabs onclick event attached to DOM that call return false . tabberObj.prototype.init = function(e) { DOM_a = document.createElement("a") ; DOM_a.appendChild( document.createTextNode( t.headingText ) ) ; DOM_a.href
我正在调试我的库在某人elses代码：它的一部分它是香草JS和我的库在jQuery中wirtten。 它有tabber.js（来自2006年的代码）选项卡，并且它具有连接到DOM的标签onclick事件，该事件调用return false 。 tabberObj.prototype.init = function(e) { DOM_a = document.createElement("a") ; DOM_a.appendChild( document.createTextNode( t.headingText ) ) ; DOM_a.href = "javascript:void(null);" ; DOM_a.title
I've recently started learning ExtJS, and have trouble understanding how to handle Events. I have no experience of any previous versions of ExtJS. From reading various manuals, guides and documentation pages, I've figured out how to use it, but I'm not clear on how it works. I've found several tutorials for older versions of ExtJS, but I'm not sure how applicable they are
我最近开始学习ExtJS，并且无法理解如何处理事件。 我没有任何以前版本的ExtJS的经验。 从阅读各种手册，指南和文档页面，我已经想出了如何使用它，但我不清楚它的工作原理。 我发现了几个旧版ExtJS的教程，但我不确定它们在ExtJS 4中的适用性。 我特别关注诸如此类的“最终词” 事件处理函数传递了什么参数？ 是否有一组标准的参数总是可以通过？ 如何为我们编写的自定义组件定义自定义事件？ 我们如何才能解决这些自
I wondered if event.preventDefault() and return false were the same. I have done some tests, and it seems that If the event handler is added using old model, for example elem.onclick = function(){ return false; }; Then, return false prevents default action, like event.preventDefault() . If the event handler is added using addEventListener , for example elem.addEventListener( 'cli
我想知道是否event.preventDefault()和return false是相同的。 我做了一些测试，似乎是这样 例如，如果使用旧模型添加事件处理程序 elem.onclick = function(){ return false; }; 然后， return false可防止默认操作，如event.preventDefault() 。 例如，如果使用addEventListener添加事件处理程序 elem.addEventListener( 'click', function(e){ return false; }, false ); 然后， retur