polymer | 易学教程

how to pass arguments to listeners in lit-element?

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问题 <div @click=${this.click_cb.bind(this, record)}>${record.msg}<div> Is this the correct way to pass an argument to a listener? 回答1: You should also be able to do this <div @click=${() => this.click_cb(record)}>${record.msg}<div> 来源： https://stackoverflow.com/questions/57585862/how-to-pass-arguments-to-listeners-in-lit-element

HierarchyRequestError: Failed to execute 'appendChild' on 'Node'

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问题 Can someone please explain why the following error occurs and what it means? Uncaught HierarchyRequestError: Failed to execute 'appendChild' on 'Node': Nodes of type 'HTML' may not be inserted inside nodes of type '#document'. I am not sure I am able to reproduce it but it occurs from time to time, usually when I import more than one custom element. It's extremely hard giving exact context since I am working on integrating polymer's paper/core elements for our in-house widgets. Broadly

HierarchyRequestError: Failed to execute 'appendChild' on 'Node'

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How can I change a Boolean property in Lit-Element to hide content on my component?

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问题 I have a custom component that should hide content when I set a boolean property to false. Every other property gets reflected except that one. I must be doing something wrong. static get properties(){ title: { type: String, attribute: 'title', }, titleEnable: { type: Boolean, attribute: 'title-enable', }, } constructor() { super(); this.titleEnable=true; this.title="default"; } render(){ return html` ${this.titleEnable ? html` <p class="title" ?hidden="${!this.titleEnable}">${this.title}</p>

How can I change a Boolean property in Lit-Element to hide content on my component?

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@font-face not working in polymer/web-components

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问题 I'm trying to get a web font into my polymer component, however the font is failing to render. Could someone shed some light on this? Google hasn't been giving me much love on this issue. If you need any more info then just let me know. Thanks! @font-face { font-family: 'open_sansextrabold'; src: url('fonts/OpenSans-ExtraBold-webfont.eot'); src: url('fonts/OpenSans-ExtraBold-webfont.eot?#iefix') format('embedded-opentype'), url('fonts/OpenSans-ExtraBold-webfont.woff') format('woff'), url(

@font-face not working in polymer/web-components

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@font-face not working in polymer/web-components

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关于一些大学课程名的中文翻译

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发信人: cameoer (趁年轻多看点comic：）), 信区: job 标题: 课程词汇（全）(转载) 发信站: 饮水思源 (2004年10月13日12:30:06 星期三), 站内信件【以下文字转载自 Translation 讨论区】【原文由 cameoer 所发表】高等数学 Advanced Mathematics 工程数学 Engineering Mathematics 中国革命史 History of Chinese Revolutionary 程序设计 Programming Design 机械制图 Mechanical Drawing 社会学 Sociology 体育 Physical Education 物理实验 Physical Experiments 电路 Circuit 物理 Physics 哲学 Philosophy 法律基础 Basis of Law 理论力学 Theoretical Mechanics 材料力学 Material Mechanics 电机学 Electrical Machinery 政治经济学 Political Economy 自动控制理论 Automatic Control Theory 模拟电子技术基础 Basis of Analogue Electronic Technique 数字电子技术 Digital

Is it possible to use Polymer inside of React?

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问题 I have been using React and look to use Polymer tags inside of React. React does not recognize Polymer tags as React only handles basic DOM tags. Is there a way to add the Polymer tags to React DOM library? 回答1: Yes, it is possible. Create a polymer element. <link rel="import" href="../../bower_components/polymer/polymer.html"> Polymer({ is: 'calender-element', ready: function(){ this.textContent = "I am a calender"; } }); Make the polymer component a html tag by importing it in a html page.