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For example, we need some code to handle the possibility of multiple versions of the same component trying to instantiate themselves on the same elements now that we no longer have a guaranteed flat t…
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### Description of the bug
onChangeHandler return default value the second time when the React page is loaded from ReactRouter
### Expected behavior
onChangeHandler should return same prope…
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### Description
I have a page with an `iron-ajax` defined as follows:
```
```
This works perfectly on Chrome and Safari. However on Firefox 58.0.2 I get no data, and an error in …
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### Feature Request Description
Featured cards highlight new or important content, acting as banners to showcase product updates, services, or useful information. They aim to engage users and encoura…
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BUT info: ReferenceError: Can't find variable: Set
so no comments returned
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**描述bug**
主应用页面切换到其他路由再切回子应用时白屏;
**如何复现**
1. 在路由 A下通过单例模式正常加载一个子应用;
2. 切换主应用页面路由B,此时 iframe保留,webComponent 被销毁?
3. 再切回显示子应用的路由A,此时页面白屏,控制台报错,显示已中断主应用代码在子应用的加载;
* 触发位置如图所示,实际上是因为 shadowRoot…
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I tried to tie a label element into a content-editable div element using for attribute but it failed.
I suppose imprementing form inputs with content-editable elements will be increased, so it's natu…
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There was a long discussion running from https://github.com/w3c/webcomponents/issues/759#issuecomment-490256626 (in which @dandclark lays out three options) through https://github.com/w3c/webcomponent…
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### Description
`custom-elements-es5-adapter.js` contains ES2015 syntax (e.g. `const e=HTMLElement`) and thus cannot be used as a shim for es5 code without compiling, but it specifically says not t…
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Nochmal durchdacht: wir sollten im Widget eine Kontaktmöglichkeit bzw. ein Impressum hinterlegen. Für Vertrauenswürdigkeit, Glaubwürdigkeit und Seriosität in meinen Augen.
Idee 1
entweder oben die…