Trying to load different contents(can be pdf, swf etc.) in an 'iframe' through javascript in an chrome extension application. The content is loaded using the data URL scheme as : // this javascript is registered in the html file and the LoadFunction is registered inside the DOMContentLoaded event on the click of a button. void LoadFunction() { window.parent.document.getElementById("pa
尝试通过Chrome浏览器扩展应用程序中的JavaScript在“iframe”中加载不同的内容（可以是pdf，swf等）。 内容使用数据URL方案加载为： //这个javascript被注册在html文件中，并且LoadFunction是在点击按钮的DOMContentLoaded事件内注册的。 void LoadFunction() { window.parent.document.getElementById("page_data").src = 'data:application/pdf;base64,' + 'base64 encoded data'; (base64 data is received from a c++ c
如何在JavaScript中将十进制值转换为十六进制等价值？ Convert a number to a hexadecimal string with: hexString = yourNumber.toString(16); and reverse the process with: yourNumber = parseInt(hexString, 16); If you need to handle things like bit fields or 32-bit colors, then you need to deal with signed numbers. The javascript function toString(16) will return a negative hex number which is usual
如何在JavaScript中将十进制值转换为十六进制等价值？ 将数字转换为十六进制字符串： hexString = yourNumber.toString(16); 并通过以下操作反转过程： yourNumber = parseInt(hexString, 16); 如果你需要处理比特字段或32位颜色的事情，那么你需要处理有符号数字。 JavaScript函数toString（16）将返回一个负数的十六进制数，通常不是你想要的。 这个函数做了一些疯狂的添加，使它成为一个正数。 function decimalToHexSt
What's the difference between Object.getOwnPropertyNames and Object.keys in javascript? Also some examples would be appreciated. There is a little difference. Object.getOwnPropertyNames(a) returns all own properties of the object a . Object.keys(a) returns all enumerable own properties. It means that if you define your object properties without making some of them enumerable: false thes
Object.getOwnPropertyNames和Object.keys在JavaScript中有什么区别？ 还有一些例子值得赞赏。 有一点区别。 Object.getOwnPropertyNames(a)返回对象a所有属性。 Object.keys(a)返回所有可枚举的属性。 这意味着如果你定义你的对象属性而不让它们成为enumerable: false这两个方法会给你相同的结果。 这很容易测试： var a = {}; Object.defineProperties(a, { one: {enumerable: true, value: 'one'}, two: {enu
This question already has an answer here: How do I test for an empty JavaScript object? 39 answers I'm assuming that by empty you mean "has no properties of its own". // Speed up calls to hasOwnProperty var hasOwnProperty = Object.prototype.hasOwnProperty; function isEmpty(obj) { // null and undefined are "empty" if (obj == null) return true; // Assume if it has
这个问题在这里已经有了答案： 如何测试空的JavaScript对象？ 39个答案 我假设你的意思是“没有属性”。 // Speed up calls to hasOwnProperty var hasOwnProperty = Object.prototype.hasOwnProperty; function isEmpty(obj) { // null and undefined are "empty" if (obj == null) return true; // Assume if it has a length property with a non-zero value // that that property is correct. if
This question already has an answer here: Safely turning a JSON string into an object 22 answers 您需要使用以下字符串解析字符串： var dataObject = JSON.parse(data);
这个问题在这里已经有了答案： 安全地将JSON字符串转换为对象22个答案 您需要使用以下字符串解析字符串： var dataObject = JSON.parse(data);
This question already has an answer here: Safely turning a JSON string into an object 22 answers try using result.rss.channel.item[0].description because from the example it looks like item is an array of objects. You can do this with jQuery. var $div = $('<div/>').html(obj.rss.channel.item[0].description); var $img = $div.find('img') $scope.imgSrc = $img.attr('src') http://jsfidd
这个问题在这里已经有了答案： 安全地将JSON字符串转换为对象22个答案 尝试使用 result.rss.channel.item[0].description 因为从这个例子看来，item是一个对象数组。 你可以用jQuery来做到这一点。 var $div = $('<div/>').html(obj.rss.channel.item[0].description); var $img = $div.find('img') $scope.imgSrc = $img.attr('src') http://jsfiddle.net/h6mp1o56/ [更新：没有jQuery] var div = angular.el
This question already has an answer here: Safely turning a JSON string into an object 22 answers Simply use JSON.stringify() and JSON.parse() http://caniuse.com/#feat=json
这个问题在这里已经有了答案： 安全地将JSON字符串转换为对象22个答案 只需使用JSON.stringify() and JSON.parse() http://caniuse.com/#feat=json
This question already has an answer here: Safely turning a JSON string into an object 22 answers As the name suggests, stringify turns the JSON into a string. JSON is native JavaScript, and based on your sample data: [ { "ID": 1127, "title": "Paul Rand", "content": "<p>Good ideas rarely come in bunches. The designer who voluntarily presents his client with
这个问题在这里已经有了答案： 安全地将JSON字符串转换为对象22个答案 顾名思义， stringify将JSON转换为一个字符串。 JSON是原生JavaScript，并基于您的示例数据： [ { "ID": 1127, "title": "Paul Rand", "content": "<p>Good ideas rarely come in bunches. The designer who voluntarily presents his client with a batch of layouts does so not out prolificacy, but out of unce
This question already has an answer here: Parse JSON in JavaScript? [duplicate] 16 answers Safely turning a JSON string into an object 22 answers Parse Json in javascript or jquery [duplicate] 7 answers If response is a string, you might need to parse it, otherwise you can read the value directly. If console.log shows an object you can expand (in developer tools console) just use var
这个问题在这里已经有了答案： 在JavaScript中解析JSON？ [复制] 16个回答 安全地将JSON字符串转换为对象22个答案 解析JSON在JavaScript或jQuery中7个答案 如果response是一个字符串，则可能需要解析它，否则可以直接读取该值。 如果console.log显示可以扩展的对象（在开发人员工具控制台中），请使用 var id = response.order.id; 如果这不起作用，或者你确定它是一个字符串用法 var responseObj = JSON.parse(res
This question already has an answer here: Safely turning a JSON string into an object 22 answers You have to parse the data into an object variable: var data = JSON.parse( datastring ); After that, you can address certain properties directly (eg data.status). 既然这是一个数组，你应该像访问它var data = JSON.parse(json_string); var status = data[2].status I suggest restructuring the respons
这个问题在这里已经有了答案： 安全地将JSON字符串转换为对象22个答案 您必须将数据解析为对象变量： var data = JSON.parse( datastring ); 之后，您可以直接解决某些属性（例如data.status）。 既然这是一个数组，你应该像访问它var data = JSON.parse(json_string); var status = data[2].status 如果可能，我建议重新构建服务器的响应，因为响应格式不太好。 第1步 ：更改响应如下： { "value1": {"longi