如何讓我的Web組件滾動到底部？

我正在構建一個響應式佈局，並且我的大多數組件都是爲了在其父項的範圍內生存。例如，我的主頁是位於頂部的固定菜單，並且頁面上的所有內容都會在其下滾動。

這幾乎可以工作，但我似乎無法讓孩子的組件獲得他們父母的正確大小，並且這樣的工件是我無法將子組件全部滾動到其內容的底部。

這裏有很多答案，涉及知道固定菜單的大小是多少，並補償孩子的邊際，但Web組件的整個構想是獨立於它們附着到你的位置應用程序。

關於如何在本示例中獲得「lorem ipsum」文本的任何想法，都可以通過黑客滾動到底部來硬編碼其位置？我需要這個工作，無論它是應用程序的頂級還是嵌入式8級。什麼是正確答案？

全plunker證明了問題就在這裏：http://plnkr.co/edit/OlOeCP?p=preview

這裏的index.html的：

<!doctype html> 
<html lang="en"> 

<head> 
    <script src="http://polygit.org/components/webcomponentsjs/webcomponents-lite.js"></script> 
    <link rel="import" href="top-menu.html"> 

    <style> 
    html { 
     overflow: hidden; 
    } 

    body { 
     font-family: 'Roboto', 'Noto', sans-serif; 
     font-size: 14px; 
     overflow: hidden; 
    } 

    body, 
    html { 
     height: 100vh; 
     width: 100vw; 
     margin: 0; 
     padding: 0; 
    } 
    </style> 
</head> 

<body> 
    <top-menu></top-menu> 
</body> 

</html>

頂部菜單組件：

和子組件，它只是顯示足夠的文字來強制滾動：

<link rel="import" href="http://polygit.org/components/polymer/polymer.html"> 

<dom-module id="lorem-ipsum"> 
    <template> 
    <style> 
     :host { 
     display: block; 
     height: 100vh; 
     overflow: auto; 
     background-color: green; 
     } 

     .lorem { 
     padding: 10px; 
     } 
    </style> 

    <div class="lorem"> 
     <h4>The standard Lorem Ipsum passage, used since the 1500s</h4> "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure 
     dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum." 

     <h4>Section 1.10.32 of "de Finibus Bonorum et Malorum", written by Cicero in 45 BC</h4> "Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem 
     quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius 
     modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit 
     qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?" 

     <h4>1914 translation by H. Rackham</h4> "But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder 
     of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who 
     loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical 
     exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?" 

     <h4>Section 1.10.33 of "de Finibus Bonorum et Malorum", written by Cicero in 45 BC</h4> "At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt 
     mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas 
     assumenda est, omnis dolor repellendus. Temporibus autem quibusdam et aut officiis debitis aut rerum necessitatibus saepe eveniet ut et voluptates repudiandae sint et molestiae non recusandae. Itaque earum rerum hic tenetur a sapiente delectus, 
     ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat." 

     <h4>1914 translation by H. Rackham</h4> "On the other hand, we denounce with righteous indignation and dislike men who are so beguiled and demoralized by the charms of pleasure of the moment, so blinded by desire, that they cannot foresee the pain and trouble that are bound to ensue; 
     and equal blame belongs to those who fail in their duty through weakness of will, which is the same as saying through shrinking from toil and pain. These cases are perfectly simple and easy to distinguish. In a free hour, when our power of choice 
     is untrammelled and when nothing prevents our being able to do what we like best, every pleasure is to be welcomed and every pain avoided. But in certain circumstances and owing to the claims of duty or the obligations of business it will frequently 
     occur that pleasures have to be repudiated and annoyances accepted. The wise man therefore always holds in these matters to this principle of selection: he rejects pleasures to secure other greater pleasures, or else he endures pains to avoid worse 
     pains." 

     <h4>The standard Lorem Ipsum passage, used since the 1500s</h4> "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure 
     dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum." 

     <h4>Section 1.10.32 of "de Finibus Bonorum et Malorum", written by Cicero in 45 BC</h4> "Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem 
     quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius 
     modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit 
     qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?" 

     <h4>1914 translation by H. Rackham</h4> "But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder 
     of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who 
     loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical 
     exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?" 

     <h4>Section 1.10.33 of "de Finibus Bonorum et Malorum", written by Cicero in 45 BC</h4> "At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt 
     mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas 
     assumenda est, omnis dolor repellendus. Temporibus autem quibusdam et aut officiis debitis aut rerum necessitatibus saepe eveniet ut et voluptates repudiandae sint et molestiae non recusandae. Itaque earum rerum hic tenetur a sapiente delectus, 
     ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat." 

     <h4>1914 translation by H. Rackham</h4> "On the other hand, we denounce with righteous indignation and dislike men who are so beguiled and demoralized by the charms of pleasure of the moment, so blinded by desire, that they cannot foresee the pain and trouble that are bound to ensue; 
     and equal blame belongs to those who fail in their duty through weakness of will, which is the same as saying through shrinking from toil and pain. These cases are perfectly simple and easy to distinguish. In a free hour, when our power of choice 
     is untrammelled and when nothing prevents our being able to do what we like best, every pleasure is to be welcomed and every pain avoided. But in certain circumstances and owing to the claims of duty or the obligations of business it will frequently 
     occur that pleasures have to be repudiated and annoyances accepted. The wise man therefore always holds in these matters to this principle of selection: he rejects pleasures to secure other greater pleasures, or else he endures pains to avoid worse 
     pains." 

     <h4>WHERE IS THIS LINE?</h4> 
    </div> 
    </template> 

    <script> 
    Polymer({ 
     is: 'lorem-ipsum', 

     properties: { 
     title: { 
      type: String 
     } 
     } 
    }); 
    </script> 
</dom-module>

來源

2016-09-24 Jim Baldwin

這看起來像的內容高度是由導航元件的高度短。在這種情況下，我認爲你可以使用[ScrollMagic]（http://scrollmagic.io/）固定導航欄。 [Here]（http://scrollmagic.io/examples/basic/simple_pinning.html）就是例子。當doc準備就緒時，設置'duration'啊內容的高度。 – ciurciurek

我會看看scrollmagic，但我想知道爲什麼會發生這種情況並修復根本原因。它好像是我在託管文檔中做的事情，我在組件中做的事情，或者兩者都有。 –

另外，這裏的關鍵是這裏的葉子組件（）應該從它所連接的任何父母中挑選它的寬度和高度。我不想在這個例子中解決這個問題。 Web組件應該如何配置，以便它可以按照它應該的方式在其父代中滾動？ –

好吧，我設法讓這個工作。我的解決方案是基於這篇文章：

https://blogs.msdn.microsoft.com/kurlak/2015/02/20/filling-the-remaining-height-of-a-container-while-handling-overflow-in-css-ie8-firefox-chrome-safari/

其中採用display:table來控制高度。我還發現我有一些缺失的height:100%註釋需要將父母的高度傳播給子女。

訣竅包括子表格中的第二個div層。我的頂級菜單組件的模板現在看起來像這樣：

<template> 
    <style> 
     :host { 
     display: block; 
     height: 100%; 
     } 
     .container { 
     display: table; 
     height: 100%; 
     } 
     .header { 
     display: table-row; 
     } 
     .content { 
     display: table-row; 
     height: 100%; 
     } 
     .content-inner-wrapper { 
     display: table-cell; 
     height: 100%; 
     } 

    </style> 

    <div class="container"> 
     <div class="header"> 
     <paper-toolbar> 
      <div class="title">Test</div> 
     </paper-toolbar> 
     </div> 
     <div class="content"> 
     <div class="content-inner-wrapper"> 
      <lorem-ipsum></lorem-ipsum> 
     </div> 
     </div> 
    </div> 

    </template>

這是我最終的結果。我相信它可能會更乾淨，但它讓我暢通無阻，並且對維度的傳遞方式有了更好的教育。

http://plnkr.co/edit/J71E3G?p=preview

來源

2016-09-25 00:18:48

該解決方案最終不能跨瀏覽器工作。在這個例子中，Safari的行爲與Chrome不同。最終的解決方案是讓我充分理解高度是如何在html中從父到子繼承的，同時也可以使用flexbox來控制每個div的高度。 –

如何讓我的Web組件滾動到底部？

回答

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