使用后“使用严格”语句在我的JS文件不允许我之后IST级使用JavaScript 这个 'use strict' module.exports = { a: function() { var self = this //works fine upto this level var name = 'atul'; function b() { this.name = name; //gives me error as can not set property name of undefined } } } this and Javascript: this references to the global object by default. ("window"
使用后“使用严格”语句在我的JS文件不允许我之后IST级使用JavaScript 这个 'use strict' module.exports = { a: function() { var self = this //works fine upto this level var name = 'atul'; function b() { this.name = name; //gives me error as can not set property name of undefined } } } 这和Javascript: 这是默认引用全局对象。 (浏览器上的“窗口”) 这引用了调用对象的例子: v
Here is my code: TextClass = function () { this._textArr = {}; }; TextClass.prototype = { SetTexts: function (texts) { for (var i = 0; i < texts.length; i++) { this._textArr[texts[i].Key] = texts[i].Value; } }, GetText: function (key) { var value = this._textArr[key]; return String.IsNullOrEmpty(value) ? 'N/A' : value; } }; I
这是我的代码: TextClass = function () { this._textArr = {}; }; TextClass.prototype = { SetTexts: function (texts) { for (var i = 0; i < texts.length; i++) { this._textArr[texts[i].Key] = texts[i].Value; } }, GetText: function (key) { var value = this._textArr[key]; return String.IsNullOrEmpty(value) ? 'N/A' : value; } }; 我正
This question already has an answer here: Javascript “this” pointer within nested function 7 answers The mainState is an object literal. 'prototype' is a property of function object in javascript used for prototype inheritance. Javascript Prototype 有一件事总是帮助我记住this将是什么,以查找谁在调用函数,请检查此代码段var sayHi = function() { console.log(this.name) } var yoda = {
这个问题在这里已经有了答案: 嵌套函数中的Javascript“this”指针7个答案 mainState是一个对象文字。 'prototype'是javascript中用于原型继承的函数对象的一个属性。 Javascript原型 有一件事总是帮助我记住this将是什么,以查找谁在调用函数,请检查此代码段var sayHi = function() { console.log(this.name) } var yoda = { name: "Yoda", sayHi: sayHi } var darthVader = { name: "Anakin Skywalker", s
This question already has an answer here: Javascript “this” pointer within nested function 7 answers If not works this way. The self technic is a closure and it should be defined in the same function as being used. For example: function myFunc() { var self = this; anotherFuncWithCallback( function() { self.myValue = this.valueFromOtherContext; }); } You can't bind this to yo
这个问题在这里已经有了答案: 嵌套函数中的Javascript“this”指针7个答案 如果不是这样工作的话。 self技术是封闭的,它应该与使用的功能相同。 例如: function myFunc() { var self = this; anotherFuncWithCallback( function() { self.myValue = this.valueFromOtherContext; }); } 你不能以你想要的方式将this绑定到你的方法上。 如果你有绑定问题,你需要改变你的方法调用: myObject.myMethod.bind(my
This question already has an answer here: Javascript “this” pointer within nested function 7 answers Try by assigning this to a variable: var XClass = function () { var that = this; this.dataMember = "hello world"; $("div").on("click", "button", function() { console.log(that.dataMember); }); } This way, that will refer to the current XClass object. Otherwise, in
这个问题在这里已经有了答案: 嵌套函数中的Javascript“this”指针7个答案 通过分配尝试this变量: var XClass = function () { var that = this; this.dataMember = "hello world"; $("div").on("click", "button", function() { console.log(that.dataMember); }); } 这样, that将引用当前的XClass对象。 否则,在事件处理程序回调中, this指的是被点击的对象。 分配this变量: var XClas
This question already has an answer here: Javascript “this” pointer within nested function 7 answers Either store a reference to this in the enclosing function and use that: var me = this; this.suits.forEach(function(currentSuit) { console.log(me.suits); }); Or use bind : this.suits.forEach(function(currentSuit) { console.log(this.suits); }.bind(this)); Or use the second argument
这个问题在这里已经有了答案: 嵌套函数中的Javascript“this”指针7个答案 在封闭函数中存储this的引用并使用它: var me = this; this.suits.forEach(function(currentSuit) { console.log(me.suits); }); 或者使用bind : this.suits.forEach(function(currentSuit) { console.log(this.suits); }.bind(this)); 或者使用forEach的第二个参数:(这可能是最好的解决方案。) this.suits.forEach(function(currentS
This question already has an answer here: How to access the correct `this` inside a callback? 6 answers Javascript “this” pointer within nested function 7 answers You are losing context in AJAX callback functions inside getTransactions and getCompanies too. Try this: Rank.prototype.getTransactions = function(callback) { Transaction.find({}, function(err, transactions) { //bla
这个问题在这里已经有了答案: 如何在回调中访问正确的`this`? 6个答案 嵌套函数中的Javascript“this”指针7个答案 您在getTransactions和getCompanies中的AJAX回调函数中失去了上下文。 尝试这个: Rank.prototype.getTransactions = function(callback) { Transaction.find({}, function(err, transactions) { //blah blah blah this.transaction = transactions; callback(); }.bind
I want to animate background from coloured to transparent. I have code like this: $('.selector') .animate({ 'background-color' : 'transparent' }, 2000, function () { $(this).css({ 'background-color' : '' }); }); It is quite complicated, because: I need to remove the style="" after the animation finishes, because otherwise the style would keep overriding the CSS clas
我想从彩色到透明的动画背景。 我有这样的代码: $('.selector') .animate({ 'background-color' : 'transparent' }, 2000, function () { $(this).css({ 'background-color' : '' }); }); 这很复杂,因为: 我需要在动画结束后删除style="" ,否则style会覆盖由.hover处理程序设置的CSS类。 所以我使用了这个技巧:jQuery - 使用.css()函数添加删除样式 我不知道有什么更好的方法来等待jQ
I have an HTML form where submit button is disabled when input value is less than 10. The button changes its color when input value becomes greater than 10. Problem comes when I use backspace or delete button to remove input value, submit button color does not change to disabled button until I refresh the page. setInterval(function () { if ($('#tot2').val() >= 10){ $("#submit").remo
我有一个HTML表单,当输入值小于10时,提交按钮被禁用。当输入值大于10时,按钮会改变其颜色。 当我使用退格或删除按钮删除输入值时,问题就出现了,提交按钮颜色不会更改为禁用按钮,直到我刷新页面。 setInterval(function () { if ($('#tot2').val() >= 10){ $("#submit").removeAttr("disabled"); $("#submit").css({"background-color": "blue", "color": "white"}); } else { $("#submit").attr
I have a button, which when clicked loads an additional CSS file, that overrides a great part of the basic CSS files. (this is for accessibility purposes if you wonder) Let's say I have a background and background-color properties used in multiple selectors for input[type='text'] . I want to reset/delete those. I DON'T want to set a new value for those background properties,
我有一个按钮,点击时会加载一个额外的CSS文件,它覆盖了很大一部分基本的CSS文件。 (如果您想知道,这是为了可访问性) 比方说,我有一个background和background-color属性在多个选择器中用于input[type='text'] 。 我想重置/删除这些。 我不想为这些背景属性设置一个新值,我想删除它们,这样浏览器就会默认渲染每一个。 其原因是因为在Firefox中以黑色背景颜色为背景的高对比度模式下,任何设置为input或butt