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                                            Aleen

[集] A collection of confusing problems met when developing JavaScript under IE

## Some shim may have wrong implementation around `Object.assign()` （`Object.assign()` 的部分 shim 会产生错误实现） For example, failed to define `toString` prototype of Object under IE8 when using `[email protected]`: 例如，当使用 `[email protected]` shim...

[集] A collection of confusing problems met when developing JavaScript under IE

## Don't try to prevent default events and cancel events bubbling in another event loop under IE8（IE8 下不要尝试在另一个事件循环去禁止默认事件及事件冒泡） ```js document.onclick = function (e) { e = e || window.event; setTimeout(function...

[集] A collection of confusing problems met when developing JavaScript under IE

## Keyup events won't fire when there is a button within the same Form under IE8/IE9/IE10（IE8/IE9/IE10 下若 input 标签所属 Form 含有 button 元素则无法监听 Keyup 事件） Recently, I found that when...

[集] A collection of confusing problems met when developing JavaScript under IE

## Some problems around IPv6 address you may need to know under IE8/IE9 （IE8 / 9 下一些关于 IPv6 地址的问题） 1. Form action need to be set with correct address format...

[集] A collection of confusing problems met when developing JavaScript under IE

## `Array.prototype.splice` is not fully supported under IE8（IE8 下 `Array.prototype.splice` 并非实现完全正确） > Array.prototype.splice(start[, deleteCount[, item1[, item2[, ...]]]]) As defined in [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice), `Array.prototype.splice` should be supported under IE8. However, I recently...

[集] A collection of confusing problems met when developing JavaScript under IE

## `clearTimeout` and `clearInterval` is not a `Function` under IE8（IE8 下 clearTimeout 和 clearInterval 并非函数） ```js ({}).toString.call(clearTimeout); // => [object Object] under IE8, while [object Function] under IE9/Chrome ({}).toString.call(clearInterval); //...

[集] A collection of confusing problems met when developing JavaScript under IE

## A pseudo-element with some scrollbar styles defined will crash IE9（IE9 下一个伪元素若含有某些 scrollbar 样式定义会导致崩溃） Recently, I have found that if there are some defined scrollbar styles, you may suddenly crash...

[集] A collection of confusing problems met when developing JavaScript under IE

## Wrong base64 images with texts from the clipboard under IE11 (IE11 下图文粘贴时错误的 base64 编码图片) When I tried to copy a snippet of texts and an image from a Word...

[集] A collection of confusing problems met when developing JavaScript under IE

## We cannot access some attributes of `DispHTMLCurrentStyle` under IE8 (IE8 下无法直接访问 `DispHTMLCurrentStyle` 的部分属性) In IE8, there is no [`Window.getComputedStyle()`](https://developer.mozilla.org/en-US/docs/Web/API/Window/getComputedStyle) method for extracting styles from a DOM element. In such...

[集] A collection of confusing problems met when developing JavaScript under IE

## `URL()` Constructor in old Edge (旧版 Edge 中的 `URL()` 构造) Before Edge 79, query arguments in the base URL argument are removed when calling the `URL()` constructor event passing...