Fix (FreeCodeCampChina#29)

* fix some typo error

* remove upcoming fileds

* resolve conflicts

Author: huluoyang

01-responsive-web-design/applied-accessibility.md

@@ -11,49 +11,3 @@
 
 
 Having accessible web content is an ongoing challenge. A great resource for your projects going forward is the W3 Consortium's Web Content Accessibility Guidelines (WCAG). They set the international standard for accessibility and provide a number of criteria you can use to check your work.
-
-# Upcoming Lessons #
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-Add a Text Alternative to Images for Visually Impaired Accessibility
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-Know When Alt Text Should be Left Blank
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-Use Headings to Show Hierarchical Relationships of Content
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-Jump Straight to the Content Using the main Element
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-Wrap Content in the article Element
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-Make Screen Reader Navigation Easier with the header Landmark
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-Make Screen Reader Navigation Easier with the nav Landmark
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-Make Screen Reader Navigation Easier with the footer Landmark
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-Improve Accessibility of Audio Content with the audio Element
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-Improve Chart Accessibility with the figure Element
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-Improve Form Field Accessibility with the label Element
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-Wrap Radio Buttons in a fieldset Element for Better Accessibility
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-Add an Accessible Date Picker
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-Standardize Times with the HTML5 datetime Attribute
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-Make Elements Only Visible to a Screen Reader by Using Custom CSS
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-Improve Readability with High Contrast Text
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-Avoid Colorblindness Issues by Using Sufficient Contrast
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-Avoid Colorblindness Issues by Carefully Choosing Colors that Convey Information
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-Give Links Meaning by Using Descriptive Link Text
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-Make Links Navigatable with HTML Access Keys
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-Use tabindex to Add Keyboard Focus to an Element
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-Use tabindex to Specify the Order of Keyboard Focus for Several Elements

01-responsive-web-design/applied-visual-design.md

@@ -6,108 +6,3 @@ At a basic level, most web content provides a user with information. The visual
 
 This section covers some of the basic tools developers use to create their own visual designs.
 
-# Upcoming Lessons # 
-
-Create Visual Balance Using the text-align Property
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-Adjust the Width of an Element Using the width Property
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-Adjust the Height of an Element Using the height Property
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-Use the strong Tag to Make Text Bold
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-Use the u Tag to Underline Text
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-Use the em Tag to Italicize Text
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-Use the del Tag to Strikethrough Text
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-Create a Horizontal Line Using the hr Element
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-Adjust the background-color Property of Text
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-Adjust the Size of a Header Versus a Paragraph Tag
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-Add a box-shadow to a Card-like Element
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-Decrease the Opacity of an Element
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-Use the text-transform Property to Make Text Uppercase
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-Set the font-size for Multiple Heading Elements
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-Set the font-weight for Multiple Heading Elements
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-Set the font-size of Paragraph Text
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-Set the line-height of Paragraphs
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-Adjust the Hover State of an Anchor Tag
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-Change an Element's Relative Position
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-Move a Relatively Positioned Element with CSS Offsets
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-Lock an Element to its Parent with Absolute Positioning
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-Lock an Element to the Browser Window with Fixed Positioning
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-Push Elements Left or Right with the float Property
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-Change the Position of Overlapping Elements with the z-index Property
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-Center an Element Horizontally Using the margin Property
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-Learn about Complementary Colors
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-Learn about Tertiary Colors
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-Adjust the Color of Various Elements to Complementary Colors
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-Adjust the Hue of a Color
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-Adjust the Tone of a Color
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-Create a Gradual CSS Linear Gradient
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-Use a CSS Linear Gradient to Create a Striped Element
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-Create Texture by Adding a Subtle Pattern as a Background Image
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-Use the CSS Transform scale Property to Change the Size of an Element
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-Use the CSS Transform scale Property to Scale an Element on Hover
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-Use the CSS Transform Property skewX to Skew an Element Along the X-Axis
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-Use the CSS Transform Property skewY to Skew an Element Along the Y-Axis
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-Create a Graphic Using CSS
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-Create a More Complex Shape Using CSS and HTML
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-Learn How the CSS @keyframes and animation Properties Work
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-Use CSS Animation to Change the Hover State of a Button
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-Modify Fill Mode of an Animation
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-Create Movement Using CSS Animation
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-Create Visual Direction by Fading an Element from Left to Right
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-Animate Elements Continually Using an Infinite Animation Count
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-Make a CSS Heartbeat using an Infinite Animation Count
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-Animate Elements at Variable Rates
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-Animate Multiple Elements at Variable Rates
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-Change Animation Timing with Keywords
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-Learn How Bezier Curves Work
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-Use a Bezier Curve to Move a Graphic
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-Make Motion More Natural Using a Bezier Curve

01-responsive-web-design/basic-css.md

@@ -16,90 +16,3 @@ There are three main ways to apply CSS styling. You can apply inline styles dire
 
 In this section, you'll see how adding CSS styles to the elements of your CatPhotoApp can change it from simple text to something more.
 
-# Upcoming Lessons #
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-Change the Color of Text
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-Use CSS Selectors to Style Elements
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-Use a CSS Class to Style an Element
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-Style Multiple Elements with a CSS Class
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-Change the Font Size of an Element
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-Set the Font Family of an Element
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-Import a Google Font
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-Specify How Fonts Should Degrade
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-Size Your Images
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-Add Borders Around Your Elements
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-Add Rounded Corners with border-radius
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-Make Circular Images with a border-radius
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-Give a Background Color to a div Element
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-Set the id of an Element
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-Use an id Attribute to Style an Element
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-Adjust the Padding of an Element
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-Adjust the Margin of an Element
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-Add a Negative Margin to an Element
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-Add Different Padding to Each Side of an Element
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-Add Different Margins to Each Side of an Element
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-Use Clockwise Notation to Specify the Padding of an Element
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-Use Clockwise Notation to Specify the Margin of an Element
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-Use Attribute Selectors to Style Elements
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-Understand Absolute versus Relative Units
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-Style the HTML Body Element
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-Inherit Styles from the Body Element
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-Prioritize One Style Over Another
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-Override Styles in Subsequent CSS
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-Override Class Declarations by Styling ID Attributes
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-Override Class Declarations with Inline Styles
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-Override All Other Styles by using Important
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-Use Hex Code for Specific Colors
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-Use Hex Code to Mix Colors
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-Use Abbreviated Hex Code
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-Use RGB values to Color Elements
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-Use RGB to Mix Colors
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-Use CSS Variables to change several elements at once
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-Create a custom CSS Variable
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-Use a custom CSS Variable
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-Attach a Fallback value to a CSS Variable
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-Cascading CSS variables
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-Change a variable for a specific area
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-Use a media query to change a variable

01-responsive-web-design/basic-html-and-html5.md

@@ -31,60 +31,4 @@ The HyperText part of HTML comes from the early days of the web and its original
 
 As web pages and web applications grow more complex, the W3 Consortium updates the HTML specification to ensure that a webpage can be shown reliably on any browser. The latest version of HTML is HTML5.
 
-This section introduces how to use HTML elements to give structure and meaning to your web content.
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-# Upcoming Lessons #
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-Say Hello to HTML Elements
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-Headline with the h2 Element
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-Inform with the Paragraph Element
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-Fill in the Blank with Placeholder Text
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-Uncomment HTML
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-Comment out HTML
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-Delete HTML Elements
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-Introduction to HTML5 Elements
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-Add Images to Your Website
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-Link to External Pages with Anchor Elements
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-Link to Internal Sections of a Page with Anchor Elements
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-Nest an Anchor Element within a Paragraph
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-Make Dead Links Using the Hash Symbol
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-Turn an Image into a Link
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-Create a Bulleted Unordered List
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-Create an Ordered List
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-Create a Text Field
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-Add Placeholder Text to a Text Field
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-Create a Form Element
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-Add a Submit Button to a Form
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-Use HTML5 to Require a Field
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-Create a Set of Radio Buttons
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-Create a Set of Checkboxes
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-Check Radio Buttons and Checkboxes by Default
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-Nest Many Elements within a Single div Element
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-Declare the Doctype of an HTML Document
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-Define the Head and Body of an HTML Document
+This section introduces how to use HTML elements to give structure and meaning to your web content.

01-responsive-web-design/css-flexbox.md

@@ -3,39 +3,3 @@
 A website's User Interface ("UI") has two components. First, there are the visual elements, such as colors, fonts, and images. Second, there is the placement or positioning of those elements. In Responsive Web Design, a UI layout must accommodate many different browsers and devices accessing the content.
 
 CSS3 introduced Flexible Boxes, or flexbox, to create page layouts for a dynamic UI. It is a layout mode that arranges elements in a predictable way for different screen sizes and browsers. While somewhat new, all popular modern browsers support flexbox. This section covers how to use flexbox and the different layout options it offers.
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-# Upcoming Lessons # 
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-Use display: flex to Position Two Boxes
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-Add Flex Superpowers to the Tweet Embed
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-Use the flex-direction Property to Make a Row
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-Apply the flex-direction Property to Create Rows in the Tweet Embed
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-Use the flex-direction Property to Make a Column
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-Apply the flex-direction Property to Create a Column in the Tweet Embed
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-Align Elements Using the justify-content Property
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-Use the justify-content Property in the Tweet Embed
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-Align Elements Using the align-items Property
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-Use the align-items Property in the Tweet Embed
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-Use the flex-wrap Property to Wrap a Row or Column
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-Use the flex-shrink Property to Shrink Items
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-Use the flex-grow Property to Expand Items
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-Use the flex-basis Property to Set the Initial Size of an Item
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-Use the flex Shorthand Property
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-Use the order Property to Rearrange Items
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-Use the align-self Property